Smart Battery Charging Control with Victron DVCC. It actually works!

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You have a small battery which gets too much power? Still on lead acid but a massive solar array connected? Hot battery because of too much current?
We are going to have a closer look at the Victron DVCC (Distributed Voltage and Current Control). It is an option in the Victron Venus OS but how does it actually work, what does it do and how to configure it?
With the new solar upgrade on the garage, I'm constantly having far too high charging currents for my battery banks. I tried restricting the MPPTs or turning on more loads during solar peak time but both is not really an option and needs constant monitoring and adjusting of the system.
Some people have already suggested to turn on DVCC in the Venus OS but I was always under the impression, we would need a smart BMS for that to work.
It seems like, the solution is far easier than I thought. With DVCC we can easily control the charging current without affecting the overall solar performance. Once it is set, forget about it and DVCC will take care of everything. AMAZING!
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8 дек 2022

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Комментарии : 251

@offgridps Год назад

Andy, thank you so much for listening to our requests and conducting these tests we didn't have time to conduct ourselves. Amazing content!

@OffGridGarageAustralia Год назад

Thanks a lot, Ed. There is heaps more too come once we have setup the Seplos batteries and BMS. Lots to test and learn for all of us. Thank again for your support!

@williamfairley2502 Год назад

Thanks Andy, I'm slowly learning all about Victron.

@edwardvanhazendonk Год назад

Thanks for sharing Andy, Victron really has thought and created a really thorough system!

@3Dscubacam Месяц назад

Great video & explanations! It looks like Victron updated the CerboGX manual to include a lot of these details. Section 11.4. DVCC features for all systems These features apply to all types of systems when DVCC is enabled; with or without ESS Assistant, with lead-acid or other normal batteries as well as when an intelligent CAN-bus BMS connected battery is installed:...

@gumpster6 Год назад

That's an interesting setting. Should come in handy for anyone with a complex setup like yours.

@camielkotte Год назад

The investment in your victron landscape is paying back itself. Very nice feature. Learning a lot here .

@evil17 Год назад

Always enjoy ur vids Andy, great info & content. Cheers

@TK-123 Год назад

Andy, perfect timing as I just purchased Victron Quattros at a Black Friday sale and along with everything else, can configure my off grid system now..

@DanBurgaud Год назад

Based on your explanation of this DVCC, I do find it a great feature!

@engineerdan3077 Год назад

I love your videos. Simple, understandable and correct. Thank you so much for your effort!

@mdunbar04 Год назад

Congrats on 50K Subs.

@580guru Год назад

Excellent knowledge share! Your videos are great in helping us put the final touches on our designs. Making me look again look at the value in the more expensive Victron equipment--we'll thought out options! You just need to know what all they CAN do and what it's called- DVCC in thus case, but whose got the time to figure it out and present it in a pre-digested, entertaining way😋 And you Andy do a great job at it-mistakes and all! Keep up the great job and I'll be sending you a 🍺

@swolath Год назад

You have the best system. Very envious. Free power for life. Well done.

@OffGridGarageAustralia Год назад

Thank you!

@damianhla Год назад

DVCC works very well with CERBO GX cordinating the various solar chargers. I use this to coordinate my 6x SmartSolar 100/50. What is nice is you can get it to read the voltage and current from BMS, much more accurate. But there is still an ongoing issue. Overnight, one or more SmartSolar can randomly go to sleep without waking up. The fix is easy, just need to disable and re-enable the controller. Luckily you can now perform this remotely via VRM. I make it a habit to check via Bluetooth or VRM each morning to ensure all my Victron SmartSolar solars are generating power and not sleeping... I have 2x other 150/100. Haven't yet connected to this setup yet as i use these with 4x 200w folding solar for my RV portable solar set-up. But shall try later to see if this sleeping / not waking up issues extends beyond the 100/50. What's more impressive is, after all the batteries are fully charged, but only the inverter is utilising power from the solar that Cerbo GX can regulate amongst the 6x SmartSolar controller how much power each controller should generate, just to meet this load, without over charging the battery. It is quite amazing to see how this magically happens via the VRM portal. 😊👍 The key towards Offgrid solar success is tuning your system so that the energy is spread out over multiple peaks and not just a single peak from one controller, which would need to be throttled down via DVCC. Ideally you never want DVCC to kick in and intervene... as this is net loss of solar energy captured. You want to have as many SmartSolar as you can setup, each having a different and non-over lapping peak output coming through. You can strategically place different groups of panels connected to different SmartSolar to achieve this. This way, if you over size your solar and over size your battery, you can easily ride out bad weather and even continue to make good power on rainy and overcast days. 🌧️☔🌞😬💪💪💪

@Dutch_off_grid_homesteading 7 месяцев назад

Heya, nice to see that victron has a hole package that all can communicate to getter

@martijnheeroma5492 Год назад

Yes, and DVCC also ramps down the charging current when SOC reaches more than 90% and stops charging when SOC is 100%. Once every 1-2 months I switch DVCC off for one charge cycle to get the SOC of my BMS in sync again (3.5V/cell). So happy with it.

@albinb.g.gulich9818 Год назад

Andreas, ich danke Dir für den Tipp mit dem Smartshunt auf DC Seite. Vielen Dank, und beste Grüße aus D.

@PanelsUpSolar Год назад

Hey there Andy, I have not gone back to binge-watch all your episodes from the beginning(yet), but the advancement of the DVCC is a great benefit but the power of ESS is also huge. I have a small system in my shop set up that is allowing me to feed my excess solar production back into my shop to help provide some of my daily use. At some point, I would love to have an array like yours but can not spend all the extra beer money on panels ya know. My goal is not to feed back to the grid but to be totally self sufficient through most of the year and to also allow me to add air conditioning to my shop.

@jimduke5545 Год назад

Well…no kidding. DVCC is muy bueno for those of us with multiple types of chargers and loads. As you have demonstrated, shunts make it even smarter. My system has 5kW alternator (Wakespeed regulator), 2 Multiplus’s (split phase on ac side but easy to parallel if shorepower isn’t split phase), and dual mppts for 800w (hey, it’s a sailboat, not a roof😎). I will take all the solar I can, then shore power, if available, then the alternator, if engine is on. I’ve only got 21kWh batt storage (25.6v) but air conditioning in summer on a sailboat without a generator is…marriage saving 😇. Next add-on will be wind. Another great video. Thanks, again. PS-one SPAT is on the way 🍺

@manuelg8412 Год назад

a never ending project :) und trotzdem lieben wir deinen content :)

@excillisbank2611 Год назад

Très intéressant ANDY, merci pour ce partage de connaissance.🐸👍

@KevIsOffGrid Год назад

Nice feature, this is why I like Victron, it has 100s of features that are only useful to a few people who never even knew they could benefit from such a feature. Although I do similar by limiting charge voltage, and that way you still get a fast charge early then just slows down and maybe never quite hits 100% - however you get full kick in for AC loads. And I was so sure that would be the route you went down for these niggles, not the DVCC I knew nothing about. But that helps a solar upgrade for me without a BMS upgrade - 100A BMS on a 900ah system with the inverters bypassing the BMS as they draw more current.

@larskiau2115 Год назад

Many Thanks Andy for this perfect explain of the Victron DVCC feature. I like it too, will use it on my boat with LeadAcid and my Solar Setup.. one point: you have change to Augustiner🤣no Öttinger any more…BR Lars

@emileviljoen 2 месяца назад

Great info thanks. I actually bought two Blue Nova RacPower BN52V-100-5.2k DU batteries to integrate with my Victron system to benefit from exactly this DVCC function. Integrating a third party BMS system with Victron can be problematic, but the Blue Nova documentation is very well written and describes setup/wiring to the finest detail. I have the Victron Shunt VE.Can included to measure battery load. This information, combined with the BMS Can info from the batteries is combined in the Cerbo for very accurate control by the Cerbo GX, leaving total peace of mind that the batteries are looked after in a closed loop system. With this setup, DVCC is forced on by the Cerbo.

@pauldevey7602 Год назад

Thanks Andy Great explanation of the DVCC week 2 with my solar living off gridd in Warwickshire having over specified my panel count off to buy an EV and maybe with the DVCC set up its time for an EV Scag ! finding your knowledge and advise a massive help cheers. Paul

@onthelake9554 Год назад

Great feature , nice .

@mytube7473 Год назад

VIDEO IDEA: Hi Andy, would you consider hooking up your NoArk DC breaker and intentionally shorting a LiFePo4 cell, and testing its capacity afterward and seeing if it gets damaged? Maybe even multiple short/test cycles. Keep up the great informative videos. Cheers.

@wayne8113 Год назад

Thanks Andy

@taulli1 Год назад

Excellent!

@junkerzn7312 Год назад

Nice episode! I'd say your current system is really quite robust. DVCC is a good idea though. Even better would be to have the current limit (going into the battery) servo'd to a battery temperature sensor. We do something similar (a temperature / power servo) for side-of-building LED lighting. It is needed not only to protect the lighting against someone programming in an all-on condition (RGBWW all on full), but also situations where full sun in summer is shining onto the side of the building that the LEDs are on. Basically the normal PWM controlling brightness has a second control loop coded up in the controller which derates it based on the temperature of the LEDs. In anycase, its a temperature servo loop with a very slow response time (about 10 seconds) and a linear ramp to avoid causing any noticable flickering or lighting changes. We limited the circuit board to around 85C, but start the servo de-rating at 70C. The system goes into fail-safe at 90C. Due to 'noise' in the measurements, the fail-safe needs to be about 5C higher than the maximum servo de-rating. For a battery / charging current servo, you would start at 35C and fully-derate at 50C or so (for LFP). e.g. up to 250A at 35C derated linerally to, say, 25A at 50C, and a cut-off at 55C. The idea is that if the servo is implemented properly, the fail-safe cut-off point will never be reached. This is essentially what fast DC chargers for EVs do, too (at least when the firmware is properly implemented).

@580guru Год назад

Great amount of info here! Now perhaps Andy takes on the task of presenting it for us visual/auditory way??

@wingnut771 Год назад

Hi Andy, please can you make a video about your DC loads, what they are and how they're connected? Cheers, great channel, I've watched every video.

@MoaningGit Год назад

Get an air source heat pump water heater, hot air in, cold air out and hot Water. I use the cold air for air conditioner. Great video, didn't know that limiting feature existed 👍

@OffGridGarageAustralia Год назад

Thanks for the tips!

@paulcurtis5496 Год назад

Like# 6, always during lunch! Did you say you plan to add another shunt to the DC Load? This is super interesting BTW!

@matija3791 Год назад

Hi Andy, with Venus OS Large and Node Red you can program controls for the charging and discharging current as you wish. So you just need a temperature sensor in the battery, which communicates to the Victron System and control the current depending on the temperature. Even cheaper alternative, if you have a lot of solar to spare in summer, you can just program it such that the charge current is lower in summer and higher in winter.

@OffGridGarageAustralia Год назад

I know, this can be done with Node Red, but no idea where to start and how to program that. Just not enough time to look into all that...

@diysolaradventures7894 Год назад

@@OffGridGarageAustralia Andy was that u on the Telegram app who sent me a message saying I won something ??

@SiriusSolar Год назад

@@diysolaradventures7894 i doubt it

@diysolaradventures7894 Год назад

@@SiriusSolar ok thanks someone posing as u tried to scam me telling me I won something he was messaging me on one of your videos comment sections

@SiriusSolar Год назад

@@diysolaradventures7894 Just to be clear I am not off-grid garage. I know he has done giveaways before and I'm not sure what method he uses to contact people but 99.9% chance that the person contacting you was literally a scammer. It's easy to tell though Just look at the person's name and click on their name. If it brings you to their RU-vid channel and it is literally the correct channel then it would be the real off-grid garage. But if it brings you to a different channel that might have some stolen videos from the official channel but doesn't have the whole history going clear back then it's a scammer. And if he's giving you some stupid WhatsApp , or telegram or some other messaging system contact then it's definitely a scammer!

@Fergo101 Год назад

You now have a system bigger than me. Challenge accepted

@jackoneil3933 Год назад

Fascinating demo and info Andy! Thanks for that. Would it be possible to turn on charge current limiting based on battery temp, say a raspberry Canbus PLC that measures temp and sends a message to your DVCC or Charge controllers?

@jon6124 Год назад

Andy, You can use Node Red (part of Venus OS Large) to create a flow that automagically adjusts the DVCC current based off of a value you set for battery max current. I use this method and have the max battery current set at 0.1C (lead acid) . so now when I add load, Node Red adjusts the DVCC current. if there is excess solar available, the battery only ever receives 0.1C with the excess current available for DC loads.

@OffGridGarageAustralia Год назад

Yeah, I know this works somehow with Node Red. Never looked into this, no idea how it works. Even all my Venus OS are Large

@jon6124 Год назад

Node Red is awesome. in summary enables automation. from node red you can read and set the state of dvcc and read battery current and DC loads. all I do is add 0.1C + DC Load Current and use this value as the new DVCC current value. this automation runs every second and now I can charge the battery at max and use the excess power for loads

@SkypowerwithKarl Год назад

Andy, I found that the easiest way to keep your batteries cool is to cool them down with a very light breeze across the top but only during the early cool morning hours and off by 9am. The buss bars are actually great heat radiators and pull the heat out excellently! If you cool them this way you, it GREATLY delays the heat buildup during the day. Remember, you don’t want to blow warm air over them when the air gets hot. Just let the stagnant air be around them when you charge/discharge. A very small computer fan is all that’s needed for each bank. If the battery is in an enclosure there needs to be a means for air exchange. My garage got pretty hot last summer luckily it does cool down at night and I have some ventilation to help bring in the night air.

@OffGridGarageAustralia Год назад

The problem with that is that it will accumulate a lot of dust over time and I would need to have some sort of airflow with also an in/outlet , filters, fans, control electronics and.... maintenance. Limiting the charging current during these hot days works brilliantly and I could see up to 5 degrees cooler batteries than charging them faster. It also does not stress the batteries as much, so win-win

@SkypowerwithKarl Год назад

@@OffGridGarageAustralia Well, perhaps a little Pelletier thermal electric unit. Trust me, it doesn’t take much to change the core temperature. I actually was in disbelief and thought it was only the surfaces and only the thermistor were being cooled/fooled but I could verify the temperature down the sides of the cells.

@john_in_phoenix Год назад

@@OffGridGarageAustraliaHumidity can also cause problems, in particular with busbars. I left a busbar in front of an evaporative cooler during the summer, and it corroded rather badly in just 3 or 4 months. I live in a substantially warmer (and less humid climate) and was wanting to see if an evaporative cooler was an option to keep batteries cool. The answer is no, it will cause too much corrosion.

@marcotrotamundos Год назад

Also when using can.bus bms controlled batteries, you can limit the battery voltage to stop charging with dvcc. Beyond this point would be great to have another video about “Using node-red to automatically stop charging when programmed soc is reached and still feeding all dc loads” :)

@45acpbear74 Год назад

Thanks for the informations

@OffGridGarageAustralia Год назад

Thanks for your support!

@SuperBrainAK Год назад

Don't worry most of us are staying quite cool over in the States, 48 degrees as well but in Fahrenheit! :D ~9 degrees Celsius.

@jimmyg6215 Год назад

-3C here in New England tonight. Try to keep my batteries warm in the off grid cabin while watching your channel. 😂🥶

@SuperBrainAK Год назад

@@jimmyg6215 yes that is chilly! Thanks!

@CollinBaillie Год назад

Living the dream.

@OffGridGarageAustralia Год назад

It comes together nicely, yeah...

@CollinBaillie Год назад

One day, I will get batteries and cabling and also have a (admittedly.much smaller, and much simpler) solar setup. Keep scratching together those pennies... 🙂

@johnemery2723 Год назад

I start balance at 2.50 and 3.65 max on a victron 100v/50amp 280ah lifepo4. I don't have enough input from solar to overheat the battery but even though it never says it's balancing it is. I wish I had your grid. All that free energy

@lotswithoutqualities Год назад

The DVCC can communicate with with the serial battery driver from Louis. You can limit with shared temperature also from DVCC ;)

@martijnheeroma5492 Год назад

yes, and that works really nice ;)

@ralphmaas9273 Год назад

Hi Andy, thanks for all your insights! I'm in the process of building my own battery for a Victron system using your video's. Some people talk about sanding the battery leads and busbars and putting some carbon paste in between to prevent corrosion and make a better connection. Can you ellaborate on that? And do you have a paste in mind? I cannot seem to find any suitable paste. Kind regards from windy Netherlands 🙂

@andyyfischer Год назад

Again, great video Andy! I have tried the DVCC settings as well in my setup, but I faced the problem that the system should all my energy (into the grid) - any suggestions how to prevent this situation? Add: I have connected the JK-BMS to my Victron system.

@harryparsonage3878 7 месяцев назад

Thanks!

@OffGridGarageAustralia 6 дней назад

Thank you very much for your support!

@evil17 Год назад

Thanks

@OffGridGarageAustralia Год назад

Thank you very much. Great support!

@Ernest_son Год назад

With all your excess energy that is available, have you thought of perhaps installing dc powered ac units for the garage? just a thought. Thanks for posting.

@danfitzpatrick4112 Год назад

I almost spit out my "spat" when you said I have plenty of power I need to waste, I'll use it on the air conditioner.. 🤣 That's a great feeling eh? Awesome!

@OffGridGarageAustralia Год назад

Yeah, it's a pretty good feeling not to be worried any more. But let's wait for winter...

@jmpcrx Год назад

And down under here in east england, its - 4 tonight and im having to use a heated mat inside my battery bank thats stored outside in my workshop!

@TruWrecks Год назад

Enjoy the sun. It is -7C at my house today and there is 3 inches of snow covering all my panels. ;-) Spring can't get here fast enough.

@tujuprojects Год назад

Half meter snow in couple days here.

@Wirelessinfopuntbe Год назад

Hallo Andy, can you demonstrate the inportend parameters on solar charge controllers for agm battery,'s on 24 volt pleace. Greatings Jean Pierre

@JPHein-pg1yk Год назад

Hallo evt ein Tipp: victron battery sense 😉 Viel Erfolg und mag es deine Videos anzuschauen Danke dafür 👍 Gruss aus Luxemburg

@OffGridGarageAustralia Год назад

Danke Dir. Guck ich mir an!

@hommerdalor6301 Год назад

Hello Andy, maybe it would be possible to pump the fresh pool water to cool the battery? 37° is still hot to my view. Cheers.

@cyberplebs6577 Год назад

🐸 I like it

@sarahjrandomnumbers Год назад

I use this all the time to keep the efficiency of the multiplus above 90%. If I turn it off and let it charge at the full 35a (48/3000), it's around 85%, and as I only have 500w of solar, the battery is always charged from the grid. I only turn if off if my ToU price is really low and not that long, then I don't care about the efficiency :).

@jackoneil3933 Год назад

Given the sealed design of the prismatic LFP cells might it be feasible to place them a liquid cooling/warming bath to maintain a constant temp similar to what Tesla does?

@davidpatrick1813 Год назад

477 I had to come back and give a thumbs up. Good job with all the video work... pat

@OffGridGarageAustralia Год назад

Awesome! Thank you!

@alikayacan6768 Год назад

I dont have DVCC facility. But I can limit battery charge current/Amp from JK Bms :)

@maxmeyer7299 Год назад

Could you briefly show an overview plan of what and how you connect the DC loads to your system? Somehow I'm on the hose what consumes so much on DC.

@TheRonskiman Год назад

I think he's using another inverter to power some stuff in the house.

@e9999qwe Год назад

Good to know! I didn't. Goes to show me yet again that I should RTFM...! I wonder, though, about the Orion DC-DC converter which does not have a charge current limit feature IIRC, so it likely would not be affected by this DVCC limitation unfortunately, would it? Or is there some secret feature that is to be revealed?

@davidkettell6236 Год назад

i have a beautiful clear sky in Ohio with 6 degrees C. Best i got today was 6.3 amps from my 800 watts but of course we are only two weeks away from the shortest day of the year.

@astrogerard Год назад

Nice but, why not automate this with e.q. node-red? Based on the temperature, load rate, dc usage you could set this value automatically.

@simon359 Год назад

I’ve been thinking about this particular subject in the last few weeks. I’m curious to know how do you know how many amps to put into your batteries at one time without damaging them? 🖖

@regnerusb Год назад

Yesss

@garys-half-baked-offgrid-dream Год назад

You win lol

@regnerusb Год назад

@@garys-half-baked-offgrid-dream next time i will wait a couple of minutes special for you.

@larsandersen2048 Год назад

Dvcc is great, but it could be great if this feature also worked in ESS mode, where feed in excess is activated. Victron do not think you should be able to turn down charge to battery. They just advice to buy a larger battery or do not do over panelling. I do over panelling to harvest enough sun in the darker periods, but this increase max current in a sunny day, which heat up battery. Makes no sense to charge fast in sunny days, you have a lot more hours to charge, so why not decrease current!

@ianpope7061 Год назад

Maybe you might consider programming a 'dump load' with the MP2 when the batteries reach full charge so as no to waste excess solar? A HWS, etc.

@MiranPayman Год назад

I actually used small water air cooler to bring down system temps in the summer days, I recommend you do the same but you need to put it outside it would not work on sticky days though. Better solution is to install 24000btu inverter Ac this will solve all the issues in your garage even 18000btu unit is enough you can use the last 10 amps to run it once temps settle power use will go down significantly.

@john_in_phoenix Год назад

I tested using an evaporative cooler here in the desert. You very much accelerate corrosion problems.

@MiranPayman Год назад

@@john_in_phoenix the space needs to be open so the air goes in and out without circululating inside and from far away using bernoulli effect.

@john_in_phoenix Год назад

@@MiranPayman oddly enough,, I know how it works

@petebuttons210 Год назад

How does the system dissipate all the unused excess energy coming from the panels?

@mariousai Год назад

any chance to control it, based on the battery temperature? using for example a Victron temperature sensor. that would be also great

@makersergio5773 Год назад

Hi, I have two mppt connected to a colour control via ve direct. Could the dvcc system synchronise the charging of the two mppt to the battery? How could I set it up? I currently manually set the maximum amps of each mppt to add up to the maximum current allowed by the battery. Greetings and thank you very much for your video

@manuelquintinhernandezhern4018 Год назад

Geni@l crack😊

@djsamira84 Год назад

Hi great video, please I have a question : my grid tie solar installation is with Huawei SUN2000-5KTL-L1 Which only use high (400v) voltage batteries but I will like to use 48v lithium battery with it, so please how can I make this combination work? Thanks in advance

@theheathkitshop2424 Год назад

Andy, what is your DC loads, loads?

@clarencewiles963 Год назад

Setting up so you don’t have to worry about it every day. Just let it run.

@walterweese2527 Год назад

Schönen 3. Advent

@OffGridGarageAustralia Год назад

Das ist doch erst morgen, Walter.

@boatelectricaldiy Год назад

There is no need for 2 shunts my friend. You need to keep charging and DC loads on 1 side of the shunt, and battery storage on the other side of the shunt. That's it. All the charging equipment have their own internal shunts to transmit data with, anything extra is a DC load. I use the 1000 amp lynx shunt for this usually in my installations. I suggest changing how you wired your installation to how we do it on ships instead of adding a shunt.

@HermitHippy Год назад

If Andy adds a 2nd shunt for dc loads then he can set the charge rate and it won't be affected by dc loads. The system will then allow the solar controllers to generate more power to run the dc load, as it currently does for his ac loads, without subtracting them from the battery charge current.

@boatelectricaldiy Год назад

@@HermitHippy you can do the same thing if the dc loads are on the charging side of the shunt as I have suggested without buying 2 shunts. All you have to do is program your battery's BMS properly so it limits the charging current. No matter how the installation is put in, the BMS for each LiFePO4 should keep it's battery safe, independent of everything else.

@caroleemoreno8086 25 дней назад

DId you have to turn off your ve networking when turning on dvcc?

@dobrzpe Год назад

anyone know if there is a "DVCC"-type setting in the Conext equipment from Schneider?

@peteradshead2383 Год назад

I have 2 smart shunt for DVCC it doesn't work , I using node-red to take the ( DC load smart shunt + your max charge amps ) and set the max dvcc charge current .

@ronny7380 Год назад

Nivea Video. Wie hast du den dc load angeschlossen.ein zweiten smart shunt.

@batterynerd8779 Год назад

Hi Andy, great video. I have a question for you. I live in cold Switzerland, where i have to heat my lifepo4 batteries in my garage to not destroy them while charging. That Problem was solved with the streetlight function on the Victron MPPT charge controller, which allows me to program the heating mat under my battery bank to switch on 3 hours before sunrise and get the batteries above 0°C. It‘s a 25w heating mat. So approx 75wh/day. Isn‘t that bad. So my question to you: i have a big problem with my solar cells icing up and taking a few hours to deice and generate power. Since a solar panel is essentially a diode, could i reverse the polarity and generate heat inside the solar panel? Will it take damage? I could use a buck converter to get the reverse voltage to a safe level. Thanks for anyone replying :)

@pulith5220 Год назад

Hi Andy nice one again. Couldn't u reduce the charge current through the bms I understand that the bms is the last line of defense and the best method would be to reduce it from the inverter. But just wondering.

@OffGridGarageAustralia Год назад

The BMS cannot regulate charging current, that is the task of the charger. (OK, this BMS can actually do it if on cell hits 3.5V, it reduces the charging current to 10A)

@pulith5220 Год назад

@@OffGridGarageAustralia is it you on telegram. Just wondering if I got caught to a scammer.

@user-jz5zc5qo6f Месяц назад

Andy, what is DC POWER in your vrm?

@PlexMulti Год назад

Ευχαριστούμε!

@OffGridGarageAustralia Год назад

Thanks a lot! Great support and much appreciated.

@PlexMulti Год назад

Andy I was almost get scammed by someone pretending that was you

@OffGridGarageAustralia Год назад

Always watch the channel name. They steal my logo but the channel name is very different.

@PlexMulti Год назад

@@OffGridGarageAustralia yes you are rite it was late night and I was surprised that I won something but it took only a couple of minutes to understand the scam I told him send me a photo from the jk bms on the bench and he send me a photo from goggle

@nielsdaemen Месяц назад

You should use all the acces power to run a small AC to keep the batteries cool and extend their life

@OffGridGarageAustralia Месяц назад

Wouldn't make sense without proper insulation in the garage.

@nielsdaemen Месяц назад

@@OffGridGarageAustralia Yea insulating the garage would be the hardest part

@adamsherman Год назад

If you add a Victron SmartShunt to the system to only show your DC loads, you can fix the problem with it only considering the total DC load.

@adamsherman Год назад

I guess I should have waited until the end of the video before commending. :)

@panospapadimitriou3498 4 месяца назад

it is the hybrid of the off griders.... i guess i cant have it without the full gx conversion and at least one external victron shunt

@SigmaOfMyParts Год назад

about 40°C for the battery is perfectly fine. I would be more concerned about a charge higher then 0.6C for cycle life

@Sprengi86 Год назад

I did try to fiddle with charge current limiting through DVCC a while ago - but the limit i set were ignored by the system since i have excess DC-PV feed-in enabled. The reasoning seemed to be that the charge controllers always need to be able to supply their full power to enable exporting the excess. Of course the system can miraculously throttle the charge controllers to not exceed the feed-in limit i have set. Really seems more like a software issue to me - i'd be very happy if Victron would address that :/

@Fergo101 Год назад

Dc feedin really does mess things up with regards to charge current - all limits from the BMS are ignored. I’ve reported it and been dismissed by Victron. At the end of the day I just disabled dc feedin.

@awesomusmaximus3766 Год назад

My outback system has current control where it only limits battery input current only but it doesn't work

@bloodcarver913 Год назад

Cool. I did something similar during the autumn to watch and adjust the temp inside the batteries. 3xinverters each at 50A=150A total atm. charging 4 big x 200ah batteries. The batteries WILL last longer when cooler.

@Elites-asthetic Год назад

With the dvcc setting of 100 amp you placed Would this also apply for shore power ? Let’s say I have 70amp from shore power coming in to charge the battery plus 50 amp on the mppt would that be a total of 120 amp

@Elites-asthetic Год назад

@offgridgarage

@kennethericsson3587 Год назад

Andy .. Why not supply the dc load before the shunt?..

@martijnheeroma5492 Год назад

is possible when the BMS communicates with VenusOS, for people where the shunts measures the current to and SOC of the battery this will not work.

@jmaus2k Год назад

Shouldn't you allow full current under 50% or 75% state of charge and reduce above that. Can DVCC get enabled over a certain voltage?

@davidpenfold Год назад

That's what some Smart BMSs can do (e.g. REC BMS with 2A passive balancing and SMA Sunny Island/Victron compatibility etc). REC BMS massively reduces current at higher SOC.

@cjtroutt8092 Год назад

🍺🍺🍺🍺🐧🐧🍺🍺😎🐸🐸 nice video We were very overcast ☁️ today but battery built back to 90%.

@OffGridGarageAustralia Год назад

That's what you want from a powerful system. Nice!

@martehoudesheldt5885 Год назад

your batt box did not have ventilation built in so it collects heat. think like your solar was like water or wind . how would get rid of the excess power? use Home Assistant and a couple of esp32's to turn on fan's in the batt box , turn on ac to cool the batt and electronics when solar is to much. home assistant can integrate all of the items (bms , solar charge, inverter's, ect) onto 1 screen and can be installed on a raspi or esp32. and if you want manage from anywhere. so far i am using it to manage 3 smart thermostats (i built esp32) , 2 epever solar charge controllers and battery volts and current and can be used anywhere. phone, computer, pad or display on a wall. check out Home Assistant.

@mikaelreichel3759 Год назад

Do you actually need two smart shunts, can´t you just move the DC load to the other side of the shunt (not battery side)? It appears odd the DC load is not separated from the current in-out of battery....it must be no? The other thing that would be useful is to be able to "dump" excess power (solar power) when batteries are full to a load such as water heater (in your case perhaps heat the pool in winter). How can this be achieved? I had planned to use a PLC/Raspi for this but if DVCC has support for such a thing it would be great. Currently designing a threephase (3x5kW) system using Quattros. Tempcontrol of battery is vital, at around 60deg C the LFP electrolyte begins to breakdown. Staying well away from this battery killer is wise.