Paralleling 3 inverters together, Growatt 5000w Solar System

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Wiring 3 inverters together in parallel to make a 15kw system! These inverters are the Growatt 5000ES model. It has a 5kw inverter putting out 240v AC from a 48v DC battery. This inverter has a built in MPPT solar charge controller that can accept up to 6kw of solar PV per inverter. That means I can have up to 18kw of solar panels connected.
I'm wiring these inverters with a solar-edge auto transformer. This allows me to split the 240v into two 120v legs. This provides the 120/240 volt split-phase power we use in North America.
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My videos are in no way intended to be instructional "how-to" lessons. I am simply documenting my project for informational purposes. Property damage, personal injury, or death may result, even when following manufacturer's instructions. I cannot be held liable for such damage or injury. It is YOUR OBLIGATION to ensure that you are complying with any local and federal laws as well as code and permit requirements.
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Комментарии : 1 тыс.

@williammeek4078 3 года назад

Great video, but now i feel old for being able to instantly recognize a serial cable.

@charlesrichards5389 3 года назад

I had one on my first mouse, back when mice had balls.

@feelingtardy 3 года назад

you'd be surprised how much "modern" equipment still uses rs232 for downloading to/uploading from

@davidchristensen1219 3 года назад

True, but mfgs have switched to using RJ11 or RJ45 connections for serial communications. On top of that, most equipment these days are using RS485 for CAN and Modus communications.

@igotedumacated 3 года назад

LOL you are not alone in that comment.

@carrieperez1618 3 года назад

@@feelingtardy I thought the same thing! I immediately said, "that's just an RS232"!

@CaptKirk1701 3 года назад

Use 4 bushings under the cover of your auto transformer to allow air to flow behind cover.

@sixoffive 3 года назад

Stand offs

@JasonWorksAlot 3 года назад

🙋🏼‍♂️🙋🏼‍♂️🇺🇸

@scoleri 3 года назад

I'd love to see the grid wired in as well. So we could see what happens at night or when the grid power gets cut. Also the same thing without a battery at all.

@mikewhitlock1849 3 года назад

Sounds like he has manual transfer switch or maybe ATS on his main grid service. He just manually overrides the ATS so he can test.

@rtheprizeisright7323 2 года назад

If you have your grandfathers tool box put chalk in with the tools in the toolbox it will keep the tools from rusting more.

@dudleykruythoffdiy 3 года назад

David it has been a pleasure watching you, it has helped me in making my the choice to use the 5000 220 volts, with a mid point transformer purchased them from signature solar and was over happy that i did not realize I didn't use the coupon code. I will be powering my entire home with this and hope to add another inverter later this year. looking forward to your updates on this installation. I think this will be the first solar installation using Growatt on the Island of St. Maarten the Dutch Caribbean.

@MiniLuv-1984 3 года назад

All the best with that project Dudley.

@jefferyhickey7342 2 года назад

Whats the cost I'm curious

@eddietee6305 2 года назад

The main drawback with auto-transformers and transformers are the efficiency. You gonna have losses. 80% efficiency is typical and decreases with increasing loads.

@IntenseGrid 3 года назад

I love your videos, BTW. You do the testing and building and make the mistakes so we don't have to. Please don't ever cover up your mistakes.

@DavidPozEnergy 3 года назад

Thanks for watching. I appreciate the positive feedback for showing my mistakes. Sometimes showing them spawns so much criticism that it makes me want to stop. Then your comment keeps me centered.

@DIYDaveT Год назад

@@DavidPozEnergy You can tell the people who are just spectators vs. those who are using your data as actionable intel. Spectators will complain, doers will thank you for sharing. Spectators actually want you to fail because it makes a better show for them AND they don't feel like they are missing out and falling behind. I'm impressed by the value prop of these GroWatt units because, yes, the Sunny island units are expensive. Even worse, Sunny Island seems designed to force you into buying Sunny Boy inverters in order to turn your solar power into something that can be used either for direct consumption or to charge the batteries. This suggests that they care more about their profits than they do about the value prop for their customers. Now, if the Growatt product turns out to be cheap Chinese junk then SMA is worth every penny because, especially in the USA, the big cost of these systems is the labor to install, not the gear. So if you can install it once and have it not break down then that is worth A LOT. But if GroWatt combines the functionality of a MidNite Solar Classic 250 charge controller with a SMA Sunny Island Battery inverter and it does so for way cheaper and it is actually reliable then GroWatt is going to dominate in a short period of time because this is the functionality that people actually want. One more thing: those who live in the city and have access to city power will be seeing their power bills skyrocket into the future. So it is becoming cost effective to install an offgrid system which feeds one side of an ATS where the city power feeds the other side and solar is made primary. When your solar system runs out of juice, the system flips over to city power as a backup. But if you size your system right, 80-90% of the time or more will be running in off grid mode.

@popoyislife129 3 года назад

Finally a video for old regular joe like me. thank you kid this video answer my question. You got a new subcriber👍

@FilAmGabe 3 года назад

Hey David great video. Can you please send a link to the disconnects that you use?

@MindCrime550 3 года назад

He linked to the one he uses on the PV side in the previous video, check the description: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-wDTkMQY3Rx0.html

@jdjd1754 3 года назад

The "old" pc connectors are DB9 and you can build your own custom RS-232 cables!

@MiniLuv-1984 3 года назад

Are you sure? They looked like DB15's to me. I could be wrong.

@jdjd1754 3 года назад

@@MiniLuv-1984 18:31 9 pins :)

@chrisdeleo4574 3 года назад

Also looks like it is RS-485 @ 19:28

@daemoncan2364 3 года назад

...and they're M-F cables to daisy-chain between units.

@ChadCourtneyTAZ427 3 года назад

The cable is a DB9 (serial cable) but based on the labeling instead of using RS232 (typical serial communication) it uses RS485 (SCSI communication - pronounced scuzzy)

@phillipsusi1791 3 года назад

@MikkelRS Indeed.. nothing to do with SCSI ( that's for disk drives ). Though the difference between RS232 and RS485 isn't voltage but rather that it is meant to daisy chain devices with a few bits to address them rather than being point to point.

@rawsonreyes9774 2 года назад

I would like a basic hand drawn lay of the wiring diagram of this set if possible

@Starkchris 2 года назад

Send me your info if you need a drawing

@hcclife425 2 года назад

@@Starkchris I could use that drawing if you don't mind

@REELAXJoor 2 года назад

@chris stark I would also appreciate the drawing please 🥺

@k4831 2 года назад

@@Starkchris I would also love to have the drawing when it is convenient.

@johnsamons1961 2 года назад

@@Starkchris Could you kindly send me that drawing as well please.

@maverickmacgyver 3 года назад

“I just checked the meter, and we’re pulling 1.21GW, prepare to jump to light speed!” -DPZ

@DavidPozEnergy 3 года назад

LOL

@ziggystardog 3 года назад

Next, he'll find a way to get his house up to 88 mph. Somehow I think hoverboards will be involved.

@LithiumSolar 3 года назад

Very cool setup. I look forward to the efficiency testing! I'd love to hear what the idle/self-consumption is of running those 3 inverters.

@DavidPozEnergy 3 года назад

Hi LithiumSolar, Idle consumption is high. 70w per inverter, plus 18w for the auto-transformer. 5.5kwh per 24 hours. I am with you, in that I wish it was lower. My SMA inverters are lower, but also cost a lot more.

@randybobandy9828 3 года назад

@@DavidPozEnergy that is crazy! 5.5kwh just to idle for a day! How much power are you generating a day during winter?

@DavidPozEnergy 3 года назад

Hi Randy, I have not gone through a winter with all 3 solar arrays producing, so I can't say for sure.

@charlesrichards5389 3 года назад

@@DavidPozEnergy Don't Growatt inverters have a low-power mode?

@Chuck.Henderson 3 года назад

@@DavidPozEnergy Over 5kw per day seems like a lot of inefficiency. I am experimenting with using a small off grid pure sinewave inverter, and then putting many grid tie microinverters in parallel with the AC output of the off grid inverter. The grid tie inverters seem much more efficient than any off grid inverters I have tried and they seem to sync up just fine to the off grid inverter. This entire system being off grid, the grid tie inverters just think they are on grid. I seem to get a lot better efficiency doing it this way, rather than using a larger off grid inverter. I do not know how well my method would scale. I only have 1.5kw of solar to experiment with, but have fun trying different configurations to try to improve efficiency. I wonder if you or anyone else here has tried something like this?

@lunatik9696 3 года назад

David seems to be a genuinely nice guy. I enjoy watching your video's. Lots of good practical info.

@oleksii.zagorskyi 3 года назад

18:40 it's a DB9 connector, in most cases used for serial port communication.

@DavidPozEnergy 3 года назад

Thank you.

@davestech6357 3 года назад

You have come a long way. They make phase sensors that monitor your power and it can really save your day by tripping a disconnect. I would add one especially if you were to lose your neutral. Awesome setup you got.

@markmyers454ss 3 года назад

Signature solar recommended watching your videos before we ordered these inverters. Thank you for the video series on these so far. We ordered 2 and the transformer yesterday. Just ordered the watt meters off Amazon as well. Thank you

@DavidPozEnergy 3 года назад

Your welcome, and good luck with your build

@theradioweyr 3 года назад

Looking forward to the autotrans floating neutral nightmare issue being addressed - I have seen how seriously a power company takes this because as they are responsible for failures on their end and how fires can occasionally be started. I recently bought the Victron 100A (still just 30A neutral capability really, not different from what you are using, just that it is a toroid and a wee bit more efficient and quiet) autotrans, mainly for potential hurricane use here in Florida and as a matching tool as I build out my PV/hybrid system to match alternate power/generator inputs to the inverters that have charge capabilities.

@paulpierce2051 3 года назад

I think your system is on par with how I wanna go. I’m installing a separate breaker box with separate “emergency” outlets in my house. From there I want to be able to run a generator or solar for the things I want on. So if the power goes out I just unplug my well and plug into my emergency power source.

@charlesrichards5389 3 года назад

I'm looking for a large toroid core to wind my own, but even the ones from China are too expensive.

@CotyCondry 3 года назад

I am building a similar setup to David's, with the Growatts and solaredge autotransformer, but using 1 breaker panel for 240v loads and a 2nd breaker panel just for 120v loads. The 2nd breaker panel gets its neutral from the autotransformer, and bonded L1 and L2 with it, and their shared power comes from the 240v panel via a single 30A double-pole breaker. This way, if the autotransformer breaker is tripped, all 120v power is disconnected and I won't have a floating neutral.

@ai4px 3 года назад

Great video. Fwiw you can stack 120v growatts asymmetrically. Really love how you let us in on what you are thinking and doing as you go.

@karikreps3513 2 года назад

Have only once wired ceiling light. Am/was telecommunications, so understand most of what your saying. I have man who says he journeyman electrican so I am considering solar & What I need. I have read about a new type glass that is capable of replacing solar panels. Then there is another guy who says they can use a spray on regular windows that can also collect the rays & supply solar. ] I don't want to buy what will be outdated soon. Have u heard about that?

@cattigereyes1 3 года назад

Total cost of the system Also as someone who’s worked with a electrician. I can see electrician knowledge from these videos.

@tomsmith4484 2 года назад

@davidpoz what's the largest guage battery cable that will fit into the 5000es? It looks like you went big. That's what i want to do. M8 5/16 terminals right? Thanks bud, long time subscriber here 👍

@maxmilliah 2 года назад

Great work, the stuff of legends. If you add a pdf of the wiring schematics that would be great for your fans.

@GreekSIMRACING Год назад

When you have this setup 3 inverter as paraller we can feed loads as 15kw but with how many amps?My home have 3 phases so i spread the loads on each phase.Which way should i go?What if we run heavy loads with in this paraller setup as i understand is limited in 50A correct?

@travisdjermyn 2 года назад

We build 100 homes a year and, I use these batteries on all of the holes that come with solar and battery in the build.. we use single or duel Sol-Ark typically, however we just started trying grow watt. Great videos for sure. 👍

@digigamer7 3 года назад

Looking forward for the next video. I'm planning in making an budget solar system for my parents here in Puerto Rico because we are right next to the hurricane season and we don't want a Maria or Irma part 2.

@kingarthurthe5th 3 года назад

Same here bro.

@nicholashowell 3 года назад

I had wondered if having 3 inverters/charge controllers connected to the same battery would cause any issues. It looks from your video like this is what you have done with no apparent issues so I guess it's OK.

@DavidPozEnergy 3 года назад

Yes, one battery bank. The manual actually says to have only one battery bank.

@paulpierce2051 3 года назад

When doing this in an off grid situation, do you bond the neutral to ground at the breaker box?

@crhu319 3 года назад

It has to be bonded in only ONE place per system. Else you get multiple paths through all your neutral and ground wires in a fault situation. The inverter documentation should clearly tell you - and show on a wiring diagram - if the incoming DC node that it treats as ground (ie doesn't turn off when off) is isolated from the most positive wire on the outgoing 3 phase 240/120. If it is isolated, you would need to bond the wires at the service panel to deal with load faults, and separately at the feed panel (near the inverters). If it is not isolated, it could be bonded in either place but not both. For compatibility with grid power you may prefer to bond it at the service panel. Bonding it in both panels is not particularly dangerous as they are connected only to each other leaving no alternate paths other than on the wire between. But code will tell you to do it one way or another.

@paulpierce2051 3 года назад

@@mikehodgetts4864 yes helps a ton. I understood everything you posted but found the new nugget of information at the end, thank you.

@TheJmac82 3 года назад

@@mikehodgetts4864 Just so I get this correctly, Main breaker box in a hybrid situation like this would be grid box correct?

@kennethnwarache8562 3 года назад

I have a couple of stringed inverters (up to 9units in parallel). Still I always enjoy watching you at the back ground.

@SyberPrepper 3 года назад

Thanks for all the detail. Much appreciated.

@captainobvious9188 3 года назад

I'm glad I'm not the only one that breadboards stuff out on the wall before putting it in conduit.

@constructioneerful 3 года назад

So cool. I'm thinking the efficiency calculation ends up considering the slight inefficiency of the new growatts compared to how many additional solar panels you can buy with the savings?

@staudtj1 Год назад

The old computer connector is called a DB9.

@chriswaller4229 3 года назад

If you haven't used the app, it has some really cool features. I'm running 2 of the new style 3kw 48v growatts rated for 250v pv and 120v output.

@abecoulter8550 3 года назад

you need to be using insulated screw drivers, that is a potential disaster there

@edstiver 3 года назад

Great content David! Would love to see a follow-up on overall efficiency of the system.

@ChinaChuck 3 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-OogbHnFa7G4.html

@walkingthruyourdata-6019 2 года назад

Very great!. I'm learning about Solar to build my own system. Yes, expensive, but I'm tired of depending on the grid. Great Vid.

@jwsolarusa 3 года назад

You have put in a lot of work into this video. Thanks for all the awesome videos and advices. Cheers

@thomasrehak9725 3 года назад

David, I am wiring 6 growatt 5000 inverters, not having much luck. From your video it looks like the load and neutral lines from the inverter to the panel go into a 220 breaker 2 pole is that correct?

@DavidPozEnergy 3 года назад

Hi. Yes. The Growatt model I'm using is SPF5000ES. This model is 240V output only. Inside the growatt the output terminals are labeled Ground, Line, Neutral. In the US we usually would label this G, L1, and L2, so that's how I treat it, as two hot legs. I run the two hot legs into my "combiner box" which is nothing more than a 20 slot circuit breaker panel from Home Depot. Each inverter has a 2-pole 50 amp circuit breaker, and I'm using 6 gauge wire. It's very easy to accidently swap your L1 with L2 from one inverter to another. This is because the bus bars jump from left to right as they go down the panel. I've spoken with some other installers who accidentally made this mistake. So try to ensure all your L1's are on 1 bus bar and all your L2's on the other bus bar.

@robbonner 3 года назад

Epic amount of detail. Good stuff

@stephaniemckeen3511 3 года назад

great video would love to know what your average hydro consumption is per day, what are some larger loads that you run off the inverters and how big your array is coming into the system plus wondering how the 30kwh battery bank is working if its lots sufficent to run your house at night or for a day of low sun. like watching your videos lots of info would like to make a similar system completly off grid with about 10kw of sola pv

@DavidPozEnergy 3 года назад

My 3 solar arrays total about 12kW. My house and garage are 100% electric. That includes oven, dryer, water heater, air conditioning, and space heating. During the winter I could use 30kwh in just one day because of heating. But most of the time I use about 12kwh per day.

@carrieperez1618 3 года назад

Really great videos, I really enjoy watching and learning! I only wish my property got enough sunlight to do this myself. I research it every couple of years, and I always give up on it because my property's too small, and just does not get enough sun :(

@dalehorne9316 3 года назад

David the grey wire for paralleling the panels is a serial connector yes from the older times but still is functional

@easylooker 3 года назад

Its good to finally see someone on the internet have a video on hooking up multiple units of a Euro style inverter. I on the other hand have 4 and use a transformer instead. All 4 go to a subpanel and from subpanel have 2 wires a neutral and hot going to the transformer, in goes 240 and out comes 2 legs of 120V. It can handle about 7x more current load than that autotransformer for just a little more money . From the transformer it goes to another subpanel that then distrubutes out to house, shops etc.

@DavidPozEnergy 3 года назад

Sounds like a good setup.

@billjohnson3344 3 года назад

It's generally not a good idea to do this in the US as the possibility of a 'floating neutral' is very dangerous. Given a fault or circuit breaker open which results in a disconnection of the autotransformer, either 120V leg could see up to 240V (double voltage) depending on the present imbalance of the phases. Say goodbye to any 120V rated electronics. Same scenario if David forgets to turn on the autotransformer breaker first - before the house/inverters. A few ways to do this correctly and safely. Autotransfer switches for home backup are wired in such a way such that the integral autotransformers can't be disconnected from the house when off-grid/grid down backup mode. Alternately, off-grid inverters have them integrated - same inability to ever disconnect. Some inverters like SMA make you use two 120V inverters instead, so you'll only loose one 120V phase given a fault (which is safe). Growatt also makes split-phase inverters with an integrated autotransformer, which are probably better for this US application (though still not UL listed).

@danp762 3 года назад

@@billjohnson3344 So, all he has to do is connect the autotransformer to L1, L2 and the neutral bar without a breaker? Maybe run all the wires from the autotransformer and breaker panel in steel conduit? just in case there is a fault? Where would you hook up earth ground?

@MiniLuv-1984 3 года назад

@@billjohnson3344 Very interesting Bill, in Australia we don't have this problem (I don't think), since we either have single phase 230V or 3 phase (380V). Can you point me to an article that describes this? Cheers.

@billjohnson3344 3 года назад

@@danp762 The SolarEdge autotransformer that David is using is designed to be wired directly to a SolarEdge StorEdge 'Connection unit' - no breaker in between. That configuration has been specifically designed, and safety verified by the certifying body (UL in the case of US usage). He is not using the transformer as it was intended. Connecting to the bus bars without circuit protection is also not a good idea. It solves the issue of the floating neutral, but an overcurrent fault in the autotransformer is now unprotected. To do what he is doing safely, the autotransformer breaker should be physically linked to all the other inverter breakers. This way a fault on the autotransformer will disable the supply voltage also. Possibly this could be linked only to the master inverter breaker, if the slaves shut down instantly when the master looses power. He'd have to test this. If linking all the breakers, he'd need to make sure they are rated to be able to trip the physical load of the multiple connected breakers. Regarding grounding, I'm not sure where he is linking neutral and ground - as well as if he has ground rods for the garage and house separately. The correct way to do this is to bond the ground and neutral at the 'main panel'. In his case here (providing power from the garage to house), his garage is his 'main panel' and his house is a 'sub panel'. So ideally the garage would have the bond, and the house would have ground and neutral separate. I suspect that is not how he has it set-up, probably left the bond to occur in his house panel so as not to disturb all that 'normal' wiring when connected to the grid.

@jameshancock 2 года назад

So let's say I want to use the AC inputs on these units as well as the AC outputs for the paralleling so that I have backup if there wasn't enough sun. What's the best way of breaking out the power? If I read from the manual correctly, it appears that their suggestion is to get some sort of 200A panel and that the units have their own breakers in them. But I can't find a 200a fused disconnect that doesn't also require breakers that isn't VERY expensive. I want to have 4 units but eventually have 6. (whole home geo thermal etc.) Suggestions?

@deltoncbaker 3 года назад

I would mount the auto transformer to a concrete board like the board you mounted the Gowatts.

@t.d.5804 3 года назад

Got 4 MPPSolar Pip4048 each 4kW in 3phase setup (Europe 400V 3p and 230V 1p) for 7 years now. Running fine, House, HeatPump/AC, electric cars. Bought them because SMA were too expensive in 2014 and they did not offer the features I needed. greetings from Europe

@desertaip9137 2 года назад

Really enjoy your videos. For this install, I'd recommend running the 240VAC lines in conduit, or using SOOW cable for safety. Or install a shield over the wiring bundle.

@michaelspencer6523 2 года назад

True

@Desertphile Год назад

Thank you. I used the Demuda 6,000 watt 24/48 VDC - 110/220 VAC input, 110/220VAC pure sine wave output 100 amp MPPT charger-inverters and I think they might have cost more than the Growatt. It has a PV input max of 5,760 Watts which is vastly larger than my two 100 watt panels. :-) Going by functionality and price, it appears to Growatt is the better deal.

@leexgx 3 года назад

I would strongly recommend using full PPE when flipping switches for the first time and especially the DC switches for solar and lithium battery Banks it can be especially dangerous as things can get dangerously exciting very quickly (at a minimum have long arm flash resistant gloves, and protective glasses but ideally full face covering type mast, might not be messing with 10kv+ here but risk is still there)

@cornwallav8r 3 года назад

PPE would make sense in facilities with larger fault current. I highly doubt this guy's system is capable of more than 4KAIC, which isn't necessarily enough to justify that level of protection.

@bobsaturday4273 2 года назад

full ppe ? sure . go back to your knitting

@ProspectorTripp 3 года назад

Hello David, Sub D connectors are those old folks PC type connectors when you were a sprout 😂 Question sir: Is the neutral box necessary for the 240v single phase items.. like the water heater, dryer, AC and so forth or just to meet the US code? I am still somewhat confused about why you need the neutral transformer. You would think it too would be built in to comply with US code. I guess not as you are using the neutral transformer. I have my shop running on solar with a SunGold 6kw split phase LF inverter. I’ve run my 240vac arc welder with no issues.. it comes to life like it’s on the grid! I’m using only the 240vac output from the inverter which is not a true neutral from what I understand? But works fine? I guess I need to study the reasons a neutral is needed and why my inverter is not acceptable for a US home? Thanks ✌️PT

@DavidPozEnergy 3 года назад

You don't need the auto-transformer if you are powering a 240v only load. I demonstrated this in my first test of this inverter, I just wired it directly to a water heater. I'm using the auto transformer so I can also power my 120v loads.

@ProspectorTripp 3 года назад

@@DavidPozEnergy I’ll go check it out.. thanks. I am DIYing my off grid home system. Finishing up the ground mount rack and mounting the panels! Thanks

@igotedumacated 3 года назад

It is really great to see guys like you do this stuff. I plan on making my parents property fully self contained in the future and seeing how you and others power their houses will help me make my parents property self contained. Do you possibly have a well to see how this system reacts to well pumps turning on?

@DavidPozEnergy 3 года назад

Thanks for your comment. Unfortunately, I'm on town water at this property. Hopefully I'll build another house in a couple years and have a well. I have tested this with air conditioners, air compressor, table saw, etc. and they all start perfect. I know someone with a well and running just one of these inverters and he reports no issues.

@billjohnson3344 3 года назад

I know this isn't grid tie, but any concerns about using these being non UL listed?

@DavidPozEnergy 3 года назад

I don't have any concerns about UL in my personal situation.

@billjohnson3344 3 года назад

@@DavidPozEnergy In the case of a household inverter and associated equipment, doesn't the NEC (and most AHJ's) require that component to be UL listed? Could be a sticky situation with your home-owners insurance if ever a fire?

@DavidPozEnergy 3 года назад

My personal experience with insurance companies is that they don't pay out, even if it's not your fault, and you followed every rule.

@MiniLuv-1984 3 года назад

@@DavidPozEnergy Ahh, we must have the same insurance companies here in Australia!

@feelingtardy 3 года назад

if you want to clean up that wiring, you could get a "gutter/troth" about 5 foot long or so, they come in many sizes. but be prepared to drill a bunch of holes of varying sizes and proper bushings. then you can run your mess inside the gutter and have holes directly under/above your connections. you'd be left with straight runs from the gutter to the connections so all the wires would be in neat lines. a lot of work though

@mwolrich 3 года назад

Yes, “Engineer775” uses those gutters all the time, wiring up the 12K Solark inverters, installations always come out looking great, and meets all code requirements as well, which is important, if you have Homeowners insurance and your house burns down due to an electrical fire 😳

@offgridwanabe 3 года назад

Good stuff I am sure you matched the voltage strings from each array so they would be the same it will be interesting to see if the higher voltage array produce more. I am still confused on the transformer feeding the 120 volts to the same box as the 240 from the inverter. I would have wired a separate breaker panel for 120 but I am not an electrician.

@firpofutbol 3 года назад

I am also confused. From other auto transformers I've looked at, there have an input from the AC source, and an output. Here I only see an output of two hots and a neutral and no input. On top of that, like you said, it feeds back into the same panel as the 240 inverter.

@johnbcampise 3 года назад

The 30 amp breaker in sub panel feeds into the transformer. Then the transformer sends 120 volts to the neutral bar. When a 120volt breaker is inserted into sub panel, it only touches one of the 240 volt panel bars and sends one wire from breaker to the 120volt appliance load (light switch, plug, etc.). The neutral return line from the appliance attaches to the neutral bar (which is attached to 120volt transformer output line). Seems weird, but that’s how it turns 240v into 120volt. So apparently since the load is not going from one 240v bar to the other 240v bar, but instead from on 240v bar to the 120volt neutral bar, that equals 120volts?

@fly4fun24 3 года назад

Great Video How about you add a wire diagram of what you are connecting l!?

@lanfordmims5080 3 года назад

David,, Thank you, Thank you, Thank you for showing how you connected everything to the main panel !!! Most you tubers show these all in one inverters how to mount them to the wall, then presto change-o it’s running the whole house, but never show how you connect to the main panel to get the inverter to run the whole house ! Cudos to you for showing the whole system connectablity! This has made my day! Of course anyone should know the final step is letting a certified electrician do the final hookup for safety. Otherwise famous last words, oh I can do this myself, then wake up in the middle of the night with the house fire alarm going off!!

@DavidPozEnergy 3 года назад

Your welcome. Thanks for watching.

@michaelagnew7825 2 года назад

Everything still working?, I feel everyone is nervous with chinese stuff. Is that 3x max in parallel;?

@DavidPozEnergy 2 года назад

Yes, everything s still working and in use. This setup was 15kw total, but since this video I took one down and am running the house on two inverters

@JamesLee-ey2yv 2 года назад

@@DavidPozEnergy I have 4 Growatt 5000 es Inverters. Can I run PV to 3 inverters and no PV to the 4th inverter? Would the only loss be not being able to charge the battery with the 4th inverter. (#14 setting is OSO "Only Solar). Do you know of any problems caused by not running PV power to inverter 4?

@technoe02 3 года назад

Your videos and others like you are how renewables become common household items. You're doing some of the hard work to make it easier for the rest of us. I really appreciate that.

@HauNguyen-kj3mn 2 года назад

⁷6⁸⁵55⁵5⁵⅚ 80

@HauNguyen-kj3mn 2 года назад

9 90 000⁰ ha t hữu ⁿ⁸ ngoài ⁶⁶⁶⁶⁶⁶⁶⁶⁶6 69 ⁶⁶5⁷⁶6⁶88ù6

@kikofras 2 года назад

1.21 GIGAWAAAATTSSS. GREAT SCOTT!!!

3 года назад

How are you dealing with the neutral to ground connection?

@RolandW_DIYEnergyandMore 3 года назад

@David, if you didn't bond yet, can you please measure the voltages from Ground to L1,N, L2. Would be interesting how that looks like with the auto-transformer...In principal, you will need to bond at that shown load panel as this is the point of entry from all generators.

@crhu319 3 года назад

@@RolandW_DIYEnergyandMore Yes in principle. But do the inverters bond the DC input ground to the AC ?

@alanmainwaring1830 Год назад

@@crhu319 No they do not , leave the DC wiring floating bond the Neutral at the switch board only in Australia RCD devices are compulsory at the switchboard. Of course USA is different.

@olegvihodets8680 3 года назад

Thank you sir . I speak Russian but your English so easy to understand so sometime I thinking you are speaking in Russian 😂

@Wingman77tws 3 года назад

you have your auto transformer on a circuit breaker seperate from the inverters... The problem with this is that if for any reason you trip or turn off that transformer, you loose your neutral completely and the voltage can swing either direction and destroy all kinds of things in your house. you need to be very careful with that. (ps I also run 240V victron inverters and I use a transformer for neutral, entire place off grid)

@DavidPozEnergy 3 года назад

Yes, I agree with you and I'm working on a solution. Did you go with the Victron Auto-transformer?

@Wingman77tws 3 года назад

@@DavidPozEnergy I did get the victron auto transformer because it has the really cool relay system, however the neutral is not neutral!!! the legs were more than 10V different! this create lots of problems, one of the biggest is that you can’t use grid power anymore because it would short out. So I’m using a 10kva transformer off eBay and have it hard wired. Overkill instead of automatic safety.

@DavidPozEnergy 3 года назад

O, darn about the voltage difference. Shoot. I was really excited about the Victron auto-transformer and was thinking about picking one up. I would have expected better from Victron.

@Wingman77tws 3 года назад

@@DavidPozEnergy yea I worked with them for a while about trying a replacement but they told me it was “within spec”. How that is within spec is beyond me. It does not even function for its intended purpose. I still kinda want to try another one just to see if I can get more lucky with it.

@eDoc2020 3 года назад

@@Wingman77tws That will happen with any autotransformer, including the one David has. You simply can't have two split-phase transformers connected to each other, one of the leads needs to be disconnected from one of them. As long as the 240v inverter's input is not connected to the grid (or any other source with the neutral and ground connected) this isn't an issue.

@iviaverick52 2 года назад

how do the three inverters handle high surge loads like a miter saw or well pump?

@alanmainwaring1830 Год назад

I have had metal cutting drop saws 2.4 KW and a welder running off two MPP Solar inverters at 8KW output have had no problems make sure 48V batteries are in good condition and large enough capacity

@johanstoltz3263 3 года назад

Hi David, great videos and very educational. One question, how big is your house if you use 3 inverters?

@DavidPozEnergy 3 года назад

Square footage doesn't matter as much as what loads you have. My house if pretty small, but it's 100% electric. stove, oven, water heater, space heating, space cooling. It can add up.

@garybrown9719 2 года назад

Can you make 3 phz

@jameswalker2088 2 года назад

Hey Dave.. Ive been a Solar Installer for over 10 years Now. Very familiar wirh Growatt and sold tons of them. However I COULD NOT GET THEM TO PARALLEL and work together.. HOW DID U do it.. Thanku. JAMES W. All Pros Solar.

@CDNguyen59 3 года назад

David, very interesting to see you installed Growatt inverter, I gave been used MppSolar for about 5 yrs, currently I have 2 hybrid inverter parallel together that give me 10kw to use for my electric cloth drier and the water heater, I hoped these Growth work ok for you, watching your video man, they look exactly installation for PIP inverters

@omarescalante9125 2 года назад

Hello David what do you think about this inverter by Growatt 3.7 out of 5 stars9 Reviews ixaer Wave Power Inverter Growatt 48V 6kW 120/240V Split Phase Solar Inverter Built-in 80A MPPT Solar Charge I got two from Amazon and I'll be getting it by the end of this month I'm planning to hook it up in Parallel Off Grid

@smakarl0 3 года назад

the computer ports / cables are DB-9 serial communication units.

@ArewaOrun 2 года назад

In case of On-grid, With 3 phase. The output of each of the 3 inverter, will it be as (L1 N1) for INV 1, (L2 N2) for INV 2, (L3 N3) for INV 3. All going into the distribution box in which L1 of INV 1 because phase 1, L2 of INV 2 become phase 2, and L3 of INV3 becomes Phase 3. All with a common Neutral. In the distribution box....,? Also, can a three phase Automatic Transfer Switch be used as a bypass to switch between grid and inverter...?

@flippolis Год назад

The connectors are DB9 (D-sub 9 Pin) connectors communicating using either RS-232 or RS-485 protocol

@edwinnetto6248 Год назад

Had 2 in parallel 5kW Growatts, replaced with 2 in parallel 8kw Sunsynk, found Sunsynk to be must more robust & user friendly.

@chrisrichardson8908 3 года назад

Is their a reason why u didn't by a solar edge instead. U could have bought 1 inverter/charger and been done

@ai4px 3 года назад

Sunny islands were $1200 each about 2 years ago. Now over $2k. And to go from 12kw to the next step requires two more inverters for $4k. Also the sunny islands don’t have MPPT charge controller in them. I’m having to jump thru hoops with mine because my peak power from sun is 14kw and the inverters can’t back feed more than 12kw. So I’m having to derate one of my solar inverters. I’m ac coupled.

@Nobody_Famous 3 года назад

Does SolarEdge do offgrid inverters?

@antoniobastos780 2 года назад

I am thinking of purchasing these for my next project. How would you recommend to wire two 15kW battery packs with two 16s bms to the inverters? I will build the battery using 16 280-320ah 3.2v lifepo4 cells

@ArizonaHighDesertHomestead 3 года назад

Newbie here... can you parallel small inverters? Say 1000 or 2000 watts ?

@DavidPozEnergy 3 года назад

You can only parallel inverters that specifically say so. Most inverters on the market don't parallel. When in doubt, assume they don't support paralleling. It's not about the size of the inverter. There are some smaller 2000W inverters that allow paralleling.

@surendrapersaud3857 2 года назад

Good afternoon David. When you placed the three Growatts in parallel. How many COMMUNICATION cable did you run from inverter to battery. Did you just run one from Master Inverter to Top Battery or did you use the network hub to have Communication between battery bank and EACH INVERTER. Many thanks

@benoito8753 2 года назад

hi thx for all your video i got a question, the circuit pannel braker like your is a 100 amp and what transfer switch would i need? Can i use this ? MOES Dual Power Controller Automatic Transfer Switch 50A 5500W for Off Grid Solar Wind System ATS DC 12V 24V 48V AC 110V 220V or i need something else ?

@pequodexpress 2 года назад

I thought there was a 120V Growatt 5000 model for the U.S. market, but there is not. Only 240V AC is available. I will have to stick with the 3000ES model for my portable setup.

@hoanggiadakwerhoanggiadakw533 2 года назад

Mình muốn mua Groqatt 6kv bạn có thể tư vấn được không bạn

@enriquemascote542 3 года назад

Hi David!, can you do a review on the MPP Solar brand? i think they use the same parts as growatt or nearly similar build, Thanks

@DavidPozEnergy 3 года назад

I did a review on the MPP Solar 5048: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-FUaDmVDcYks.html

@echopapa243 2 года назад

Here’s a solution for the 120VDC auto-transformer failure or disconnect. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-wMewui1CZW4.html

@ajiboladavid3835 2 года назад

Thanks bro, your video was fantastic,i really enjoyed it. however, i am in Nigeria and our voltage is 240v. i need to power a single phase equipment of 12kw i have 2 units of 10kw Growatt inverter how to i run the connection (combining the both inverters) to power a 12kw equipment? Please help me out ASAP thanks.

@fidoleung4617 2 года назад

Hello David.. Want to confirm how do you DIY your lithium battery rack .. Pls Expecting you confirm

@williamseptember640 2 года назад

Hey brother, I have a Growatt TL5000, with 6.6kwh Growatt Lit batteries and 2200w solar array (2 strings) Solar power increase incrementally from 8:00 in morning up to 12:00. At this time the battery is fully charged, then solar goes off-line and the battery supplies the load. How do I get the solar (pv) to continue supplying the load even when the battery is fully charged, until such time that; (1) there is no sunlight?, or (2) the load requirement by the house is higher then solar output ? Where at this point I should be able to choose if the battery or utility should supply the load.

@njc7293 Год назад

Nice video and set up but has an electrician I am super concerned with your wiring methods. 120/240v (high voltage) should NOT be ran open with no conduit.

@codeworksarena 2 года назад

I really enjoy your video. Quick question, what is function of Auto-Transformer. In my country we use 240V.

@SandeepSingh-qi6gj 2 года назад

Sir,Can we connect MPPT of Solar On Grid Inverter in order to reduce current on each MPPT.For example I want to use 18 Amps Panels with 11 Amps per MPPT Solar On Grid Inverter.Is it OK if I wire all 14 panels in series in a single string and then split up using Y cable and feed both MPPTs to reduce current to each MPPT to 9 Amps?

@dcobb9558 3 года назад

Would you calculate the standby power consumption of this setup? I think that could be one of the weaknesses of this system.

@DavidPozEnergy 3 года назад

Yes, it is a weakness. about 70w per inverter, and another 18w for the auto-transformer. about 228w in idle. I have this connected to my house. There is always a load on my system 24/7. Anything from my ventilation system, cell phone chargers, up to the oven, and heating.

@dcobb9558 3 года назад

@@DavidPozEnergy That works out to about 5.5 Kw per day if my math is correct. In any case, I really enjoy your videos and I have learned a lot from watching you. Thank you for all your hard work.

@MiniLuv-1984 3 года назад

@@dcobb9558 That is substantial kWh draw. David's 30kWh battery bank will be flattened in under 6 days with no other draw or solar charging. I'm looking for myself, so I might look at the self draw specs a little closer. Thanks D Cobb for point this out.

@ahnafpiash 3 года назад

I don't know since when but my subconscious mind has been waiting for this video since the last video update!!

@alanloughman 2 года назад

hi David.. great videos .. I have a new led acid 48v 560ah forklift battery here and am going to install a 6kw solar pv system on my house ..all the solar pv company's here in Ireland don't want to know about forklift battery's. only want to sell me 3 .....5kw lithium battery's at 9000 euro... so my question is ..what hybrid solar inverter should I use and do I need mppts or how many .. . I'm fitting 18 pv panels @380w each

@farside87 3 года назад

Dave, another great video. Thanks for all the information. Let us know when you get those fuses and where you install them.

@franciscovalderrama719 2 года назад

How do you connect these units in parallel when your commercial AC is 208V L1+L2+N? Is it possible to connect the two L1+L2 onto L+N to still have the 208V?

@tomiylilammi 2 года назад

You shouldn´t connect two different panel chains to one (with a crymp). Every chain is producing different power and voltage so other is backfeeding the other imo (if you don't have diodes in between). I don't think you will brake anything, but you will lose power....!?

@solexxx8588 3 года назад

David, can you test one 5000 watt inverter directly to a 4500 watt water heater and see if it will work without batteries from a large PV string? I have hydronic heat and more panels than I need for electricity. My plan is to run direct hot water from 6000 watts of solar panels through the Growatt 5000ES if it will work. If it won't work I'm going to include a 48 volt battery in the system. I have 24 extra 265 watt solar panels and want to put them to work. I heat water and my floors with Nat gas now. I enjoy your videos. Cheers!

@DavidPozEnergy 3 года назад

Hi Solexx X, In my first video on these inverters I ran a 4500W element off of the inverter, but it was fed with my battery bank. Could you run it through the inverter without batteries? Technically, yes, but it will be hugely disappointing. 4.5kW element on a 5kW inverter is about 90% load. Up there I think I measured the inverter at 88% efficiency. That means the inverter will draw 5,114 watts. The largest array you can connect is 6kW. This means that the inverter will only turn on when your solar array is producing >85% of it's rating. That happens about 2 hours a week at my location on my arrays. Most of the time they just don't produce that because of clouds, angle of the sun, haze, smog, shade, temperature, dust, etc. If you want to run a water heating element directly from solar, I'd suggest doing so without the inverter. I have a few videos on heating water directly from panels. Start with this one: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-kVaxAfXQPDU.html

@solexxx8588 2 года назад

@@DavidPozEnergy Hi again David. I did watch your direct water heating videos but I don't think for my load that is very efficient. I'm going to invert to 240 volts with the Growatt 5kW and have purchased 7 of the 36 volt 36v 48ah 1.78kWh POWER Module - 60x SPIM08HP from Battery Hookup that I will convert to 48 volts and 12kw/hrs of storage. I will run 2X3000 watt elements and use the load sharing of the Growatt to see how much it reduces my peak daytime load on the condensing gas boiler. My electricity is very cheap from 07:00 pm to 07:00 am. The most expensive power where I live in Ontario Canada is just 5 hrs.

@Redblower 3 года назад

Dunno where you got the idea sunny island have to be in pairs I have 3 in a 3 phase setup. You also havent explore the fact that sunnyisland mates with sunny boy inverters and the output is aggregated between yellow inverters and red inverters. But...you are telling the story...LOL...BTW two sunny islands give 16kw....using the 8.0h models

@rklauco 2 года назад

You won't believe it - there is like 15 reviews of the Growatts all over the place. NONE of them shows you can multiply the charging by having more units, not only the AC output. This video answered my biggest question on the inverters. Thanks!

@DavidPozEnergy 2 года назад

Glad it helped.

@swtnlnly 2 года назад

Heard or read somewhere that auto-transformer only handles 21 amps...That's not enough to run a clothes dryer, cook stove or even possibly a well pump... Are larger capacity auto-transformers available???

@angelkm2599 4 месяца назад

Hello, I have a solar installation with 3 inverters 5 kW mounted in parallel with a total single-phase output of 15 kw but I have a three-phase public network subscription of 15A per phase, I would like to know if it is possible to make the network injection of the 3 phases with a phase by inverter on the prallèle mono

@jfree9951 2 года назад

@DavidPoz Looking for your parts list with the video, the switches and the battery rack grommets. The meters? Are your inverters in 1 phase? are they in 2 phases? Love your shows, I have the 2 growatts and the transformer on my table, waiting for panels and G4LL lifepower batteries.