Building the SEPLOS MASON 280 DIY Kit - What a BEAUTY! Da-Da!

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Today, we are building the SEPLOS MASON 280 DIY Kit. From scratch to finish. Even it is a DIY kit which comes with all the parts, it is still a lot of work. And challenge. Especially, if there is no real installation guide. I made the best out of it and just followed what we learned form the first MASON built.
During our work, I explain all details of building this battery. We also got some headwind and have to repair a few battery terminals. Unbelievable how many are now stripped an faulty of this 'old' battery. No big deal and it is quickly repaired.
At the end everything seemed to have worked well and the battery built is now complete. Not quite, there are more problems with this kit. When I tried to turn it on,...
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6 окт 2024

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Комментарии : 392

@danielp5208 2 года назад

Hey Andy! So I just assembled three of these last week and I have the following comments to your build: The chewing gum is a heat exchange pad, it goes on the heatsync on the back of the BMS PCB. I cannot for the life of me figure out why they opted to "save" putting this in before shipping and fix the BMS with the 6 screws so it's actually in place, but you have to take off the BMS from the front plate, attach the heat pad and screw it down again. When you put the BMS back, make sure that the LED diodes align with the holes in the frontplate. The same for the display, you have to loosen the two screws it comes it, slide the display to the far left if you are looking from behind and screw it back in and add the additional two missing screws. This is why you had issues pressing the buttons, because the alignment is off, so the buttons don't travel properly. The busbar for the positive terminals on the front is facing the wrong way, you need to put the "nut side" towards the fuseholder. There was 4 little round foam discs in the kit, put them inside the top holes of the case, so the next box you put on top rests with its feet on that foam pad. I got the 200a bms and it worked fine for connection via the RS485 ports like you showed with the previous build. I also told Seplos that their packaging inside the case was borderline stupidity with 3/3 bags for my kits broken and things all over the place. I recommended a cardboard box for all the bits and pieces and separate box for the BMS and display as well. In one of my cases, the PCB of the BMS had actually broken off a corner due to being beaten up in shipping and them not attaching it with the full 6 screws. I'll look forward to you getting the rollable basestation and hear your judgement on bolt alignment vs the wheel attachment plates :P It'll be fun.

@RoddyPerry 2 года назад

I did the same terminal repair after seeing your previous video. You saved me big time! Thank you so much Andy!

@OffGridGarageAustralia 2 года назад

Thanks a lot. Many have complained about this method but I think it's brilliant. Quick, easy and safe!

@GeoffHou 2 года назад

@@OffGridGarageAustralia the only thing I'm a bit concerned about is the dielectric corrosion between aluminum and stainless steel

@MeineEnergiewende 2 года назад

same experience as i made. The Case is top notch .... the BMS needs a software workover ! Nice video as always ! Thx Andy.

@danmc1313 2 года назад

Great video. Been looking forward to the 280AH Mason build as I have one en route. Can't wait for the testing.

@OffGridGarageAustralia 2 года назад

Great, hope you can find all the parts 😂

@WillieKiely Год назад

Great info. You could have had Triio from your home country with DaDaDa.🤣 In the background.

@SkypowerwithKarl 2 года назад

Hey Andy. Stack a second flexible jumper in the back. You’d be surprised at the residence difference between the buss’s and the cable. At higher charge/discharge rates you may get some weirdness between 8 and 9 if you don’t.

@polsariuk Месяц назад

Hi Andy. Hello from miserable wet chilly England. Loving the channel. Just received my mason 280 v3 in the UK there is an active balancer on the compression plate, a sold end plate now where you put the aluminium sheets in the follow up video. All the gubbins also came in a separate accessories box… so just a shame the supplier sent the wrong accessories box for the vertical mason case not the stackable one. So looks like your vids have had a positive effect on Seplos. Well done 👍

@Sylvan_dB 2 года назад

Nice repair on the stripped terminals. Having them all torqued correctly is a good thing. My O.C.D. would like to see all the terminals matching size, but I try really hard to fight that when it adds extra work and extra risk to my projects!

@OffGridGarageAustralia 2 года назад

Over time, I will probably end up with replacing them all. I could already feel that some just made the 5Nm but would not go any further. The UNC screws seems to be rock solid.

@vferrandobe 2 года назад

Hi Andy! A couple of suggestions. Just in case you haven't already found. The busbar screwed to the positive terminals should be reversed. The thread on the opposite side. This way you'll have more contact area with the bar coming from the fuse. The "chewing gum" is for better heat dissipation on the BMS. It is supposed to be installed between the front panel and the BMS's heat sink. Kind Regards.

@SuperBrainAK 2 года назад

hah I was going to comment that same thing! I was waiting for him to realize his mistake. But at least I wasnt alone! good eye!

@wolfgangziler6125 2 года назад

In my case (literally box) the heatsink of the BMS ist only 1-2mm away from the front plate. When I put that blue stuff in, the PCB will be bent extremely. AND! As I tried that, the thermolube of the heatsink was pushed to the outside :(. So, I decided to not use this chewing gum.

@trevornelmes9331 Год назад

@35:30, if you reverse that metal busbar, the bridge connector to the fuse is too long, and not flexible enough to fit. It must be the way Andy shows it.

@vferrandobe Год назад

@@trevornelmes9331 I'm not sure if I understand what you mean. I've assembled a couple of this boxes this way. And there is no problem with the length. Only very slight curve on the bar.

@trevornelmes9331 Год назад

@@vferrandobe Ah. I have one on its way. The front panel is a revised design. The power terminals are vertically arranged, as I look at the front the negative two are on the left and the positive ones on the right. The LCD is in the middle and looks different also. Supposed to be to allow vertical cabling runs easier. The connecting 'flexible bar has the busbar to join each terminal pair built in, so that positive bridge busbar is no longer there. The fuse is a different type as well. The front also has a power button, that goes to a jumper on the BMS. The cell busbars have insulation and are the 'flexible' type that has a hump in. The BMS has Bluetooth. They did me a really nice deal of ~ $700 delivered including UK taxes, 150A BMS and the trolley.

@retrozmachine1189 2 года назад

These high capacity batteries are nice from an energy storage point of view but there's more to think about than just that. You have to think about being able to physically move it and that's more than just putting it on a skateboard to wheel it around the workshop floor. How to get it into the eventual mounting position, by yourself, for example. That could well mean you need some sort of lifting machine, manually powered or otherwise and that adds onto the cost of the overall project. None-the-less, as usual always interesting to watch Andy at work.

@pau1phi11ips 2 года назад

Indeed, I've got a 24V 280Ah pack in my van. The cells and the box are 50kg. Just about manageable to move around but I wouldn't want it any heavier.

@mbr8981 2 года назад

Some 🧀 to your 🍷

@HippocratesGarden 2 года назад

I'm thinking a Hoyer type patient lift (medical version of the automotive engine hoist)

@OffGridGarageAustralia 2 года назад

I think if they are on the trolley, that's how I would install them. But yeah, the weight is something I have on my list as well. You would need 3-4 people to lift it up now if it goes in an enclosure of any kind. Very valid point.

@hummmingbear 2 года назад

I have the same box and put it together a little over a month ago. I opted to use the busbars that came with the EVE280 cells instead of the Aluminum ones that were provided by Seplos (for reasons you already know!). Mine were shipped in the exact same s**t show way that yours were. I complained and never heard a thing back from them. To be honest they have some of the worst customer service and could care less after they get your money (my experience). I also opted to replace the front connectors with Amphenol connectors as I couldn't find any information or links to buy my own connectors/crimps from the company who makes the ones they provided (futronics). I paid an arm and a leg for it though, but I wanted to be able to make my own length cable/connections. I bought a hydrolic pump motorcycle lift to build these on and then lower and roll them into place :)

@OffGridGarageAustralia 2 года назад

Thanks for sharing your experience. So far, I cannot complain about their service. Sometimes it does not make sense what they're replying but at least they reply. I will pass your feedback on to them! The connectors are on my list for the verdict video. I don't like them either. Seems you can only buy them from Seplos directly for a lot of money. I'll have a look at some alternatives too.

@hummmingbear 2 года назад

@@OffGridGarageAustralia I asked them multiple times about what connectors they use on the front but they didn't reply. I only found out when I received it. It also arrived damaged (cosmetic) with a large dent on the front and the "flying busbars" as I like to calls them, no response. I like the units and they are well built, but I wouldn't trust them if I had issues.

@yasasjayasuriya1258 2 года назад

@@hummmingbear just try to chat with them via whatsapp. I also face same difficulty as you. I tried to get details about these connectors, bcz I've to use custom battery cable length. After 2hrs I able to get right answer, that's meant they didn't help. The guy I contact he's very helpful to me. But he's not a technical guy, so he had to wait for his technical team response. By the way, they used 50mm square terminal for 200A BMS. He already sent me, tech specification for it.

@typxxilps 2 года назад

@@OffGridGarageAustralia Here they had not replied too, only before payment they had been very responsive. Beyond that there was silence. Luckily I had paid with paypal and if they do not get it done soon I will call paypal to open a full case, where they will have to pick the whole mess up. I do not need a discount on a broken product. I had fully paid and shippping can not be that hard . Have never seen such a bad shipping preparation for the parts inside.

@benzulfuzool6010 Год назад

Sehr gut ! Dakushun to take time explain all the process. Your are master🎉🎉

@raymondcastro734 2 года назад

At 35:40 you put the main positive bus bar upside down. The fixed nut on the bus bar makes very little contact with the flexible bus bar coming from the fuse.

@howardschlunder9754 2 года назад

I concur with Raymond. Along the same lines, you should also add at least one and preferably two more of the Digital Mermaid's flexible bus bars on the 8+/9- node. IIRC, her most recent bulk bus bar build was yielding 110 microohms each, whereas your Seplos aluminum bus bars are close to 1/3rd of this. 110 uOhms @ 150A that the BMS can do is 2.5 W of waste as heat - an unreasonably high value for only a few centimeters of wire.

@OffGridGarageAustralia 2 года назад

Yes, that is correct. If I flip the busbar the flexible bus bar to connect to the fuse will be in a bad shape though.

@heinzblank6065 2 года назад

Hallo Andy, nice and funny video as always 👍 I installed with Jens (you know him) 4 of this great cases with the worst BMS on my boat. The USB-serial connection sometimes works, when you activate the first battery on the right side, so that it is green. Just one of many bugs of this system. I could not get it running reliably, so I am changing all to Batrium now. Best wishes from Vienna, Heinz

@jamesgates1318 2 года назад

I built my 280ah seplos also months ago and it came in the same condition. Even had the bms leads ripped off of the pcb.

@OffGridGarageAustralia 2 года назад

FFS, that should not happen. I'll have a word with them!

@BlueSky-cy5nw 2 года назад

Andy next time use a hex key on the head of the grub screw to hold it in place while you tighten down the hex nut, otherwise you might end up with more stripped terminals.

@TechGrowls 9 месяцев назад

I'm tearing up ❤ "DA-DA" or better yet Bippity boppity boo🎉😅😂😂

@mickm68 2 года назад

Andy another great video , small correction around the 23 minute mark all references to milli ohms should actually be micro ohms.

@leonhardtkristensen4093 2 года назад

I don't know if any body else has mentioned it but I think the fuse should be on top of the bus bars as if it blows it will be much easier to replace it.

@HawK4all 2 года назад

Well Andy :D nach Fest kommt Ab ! ;)

@jackoneil3933 2 года назад

Good Show Andy! And who doesn't enjoy a helping solve a mystery at the Chinese Puzzle Factory? "da-da!"

@OffGridGarageAustralia 2 года назад

Thanks Jack. Yeah, it was a bit of a puzzle but got it all sorted now. If that damn thing would only work now 🤷‍♂️

@jackoneil3933 2 года назад

@@OffGridGarageAustralia Well, even if it doesn't work, it's still a positive result at the Off-Grid Garage. "Da-Da!"

@marcorobbe9003 2 года назад

Its nice to here, that the new screwas will hold BOMBENFEST 🙂

@FutureSystem738 2 года назад

Thanks Andy, great job as always! At the rate you’re going, you’ll be able to feed your local area in a blackout 😂

@KSA-wo7dh 2 года назад

I ordered one last week. Been looking forward to this video. Hope things get resolved for when they ship mine? Enjoyed it, you are very entertaining:) Thanks

@OffGridGarageAustralia 2 года назад

Thank you. So far their support was very good. I hope that is not just the case for me.

@KSA-wo7dh 2 года назад

@@OffGridGarageAustralia Da-da😃

@kennyparker1195 2 года назад

Hi Andy, Thanks for another great video. Communicating with Seplos can take days, but they respond eventually. They said they would replace my damaged batteries. But no tracking number yet! Looking forward to your next video. Have a sunny day 😎

@jesperbjerregaard9991 2 года назад

Really enjoy your channel. I can add that for battery tension I did look up some table values for torque and tension. In the inner front plate we have 7 times M6 screw and used friction values for a dry screw. If there is still play and all batteries receive the tension and not the frame then we should only tighten with 0,9Nm per screw. This correspond 85kg per screw and should give the recommanded 600kg for the 2 rows of cells. If there is no play and tension is taken by frame there should be inserted a spacer in each row. Also note that the EVE datasheet state that the recomanded 300kg is at 40% SOC as the dimension increase slightly by higher SOC.

@philippe5394 Год назад

Hi Andy! @22:25 your dc resistance is 37.5 µohm !!!

@markobotz2890 2 года назад

As my Mason was delivered it looked exactly the same and I wrote a an email to Seplos and they say OK we will deliver it the next time with a cardboard box 😂🤣 but you are the best example that Seplos didn't change anything 😉. But for 600 USD you should expect the parts better packed. I ordered a second one so we'll see 👀.

@markobotz2890 2 года назад

Your "chewing gum" is heat transfer gum which go underneath the bms to transfer the heat to the front panel, schön Grüße Marko

@OffGridGarageAustralia 2 года назад

They will get some more feedback. There was nothing in the installation guide about the heat pad and the BMS was already mounted 🤷‍♂️ Danke Dir!

@gavinnoname1424 2 года назад

@@OffGridGarageAustralia I think the PCB was only loosely mounted for transportation. The blue stuff goes between it and the case for thermal, then remount the PCB with extra screws. They have a RU-vid installation video on their YT channel

@rjadventure15 Год назад

I Enjoyed watching, thanks sir😊

@williamcoyne2587 2 года назад

Andy try selecting "Pack1" in the BMS software. It may allow comm to battery to work.

@joebachmann7757 2 года назад

Hey Andy, been following your channel for awhile. I just recently put together one of the Seplos Mason 280 and communications are working fine for me. FYI, when the battery is in a discharge state my capacity lights are on and my run light blinks green and the display is off. Both rs485 ports work for communication to the computer software. I have spent alot of time understanding this software and have pretty much mastered it and it's quarks. I modified the software files to fix alot of the bad English translations in the software. If you would like any help or access to the files to fix the translations let me know!

@viewvestr4066 2 года назад

Hi Joe - Are you able to post those translation fixes in a google drive and share the link?

@Tom-jd1rm Год назад

Excellent

@patrickmartin4482 2 года назад

Hey :) as u build already 5 of them and ordered another 10, some feedback from Germany. Not everything is good at the DIY system (lacking manual), but not as bad as it looks. Usually they send the youtube link where you can see more than in the manual on the website -> a lot of room for improvement here for Seplos. I used EVE 280AH cells from Docan, i put 5 or 6nm on the studs and none broke, maybe i was lucky, but for 80 cells ? Maybe yours were just bad. This time i will get 160 CATL cells, let's see. The blue rubber pad is a Wärmeleitpad - thermal transfer pad. You have to remove the BMS and put that on the heatsink, it has exactly that size. I used the seplos bus bar as it measured better than the Docan busbars. My Seplos BMS is 200A Version. For all screws that are preinstalled -> they are low quality and just for transportation, just throw them away, you have all new screens in the package (my "transportation" screws were already rusty ). The copper rings are used on the cells before adding the busbars. For my cells all busbars fitted. The cell cables, plug them into the BMS side first, then you dont need your condom solution, just plug them into the battery side as the 2nd step. The new shipment include a cardbox with all materials, i already received a picture. My first 5 came as yours, awful, really really awful. One had a defect display, replacement came in around one week, really fast. To connect the BMS to the PC, select cell 1 in the software, then press connect. Try dip 1 on if it still does not work. I think you have one foam left over for each side, there has to be 2 on he first cell behind the steel plate -> then the screw is long enough to put 8-9nm pressure. Improvement they need to do from my side: - packaging (maybe already fixed) - a really good manual, PDF link or even paper - a good description of the software and how to use it and how to connect (there are several PDF with the dip switches, in some the order is changed, in some not, awful !!) - pre-modified fuse holder cap that it fits

@Altenurgy 2 года назад

Can you comment about the just buying it as a fully assembled rather than DIY? I asked Seplos and the price difference was tiny. Why wouldn't I just go that way? I'm looking for a good deal on battery, not a new hobby if that makes sense. Thank you.

@patrickmartin4482 2 года назад

@@Altenurgy for me the difference was not tiny, and the cells from seplos are neither Eve nor CATL

@Altenurgy 2 года назад

@@patrickmartin4482 That little birdie does keep telling me something is likely amiss. I'm relatively new to all of this so the cell manufacturer wasn't even a matter I thought to look for. They've sent me lots of documentation including a 12 page one on the cells. No mention of manufacturer that I could see. 6000 cycles @ 80% though. So if I understand correctly you bought thier kit are providing your own cells? I hadn't even thought about that.

@patrickmartin4482 2 года назад

@@Altenurgy I ordered 80 eve cells @ docan and this time 160x CATL

@Hasskasper Месяц назад

@@AltenurgyWenn du jetzt wirklich glaubst, daß diese 'S E P L O S M E N S C H E N' den Pack besser zusammen nageln , als ein versierter Schrauber, dann hast du dir viel Zeit gespart 👍 Wenn dein Keller, oder wo auch immer du das Teil dann hin stellst, irgend wann wegkokelt , haste aber auch nix gewonnen . Die Chinamänner wirds aber auch nicht interessieren . Da bin ich schon mehr auf der Schrauberseite 😉 Da weiß man was man hat ☝️

@herculestubalado906 7 месяцев назад

Thanks!

@OffGridGarageAustralia 7 месяцев назад

Thank you!

@SwissLord 2 года назад

Well done Andy, I'm sure the issues can be fixed. In my dreams I would whish to have this metal case, PCB, size for 310AH and the JK BMS... I did not decide if I will build my own in wood, as my 310AH Cells are still sitting here and wait for a nice dress. Or I buy additional 280AH and give Mason a change.

@hmarc417 2 года назад

Yellow Oversize post-it notes all over the place LOL 😄

@kenlillia 2 года назад

Great video again Andy. I like the da da for the torque wrench, still not as good as bended. I purchased dc power supply you recommended on your website (5amp model works brilliantly. Will be interesting to see what the issue with the BMS is in the latest build. Cheers Ken

@OffGridGarageAustralia 2 года назад

Thankyou. Yeah, it's now Monday morning here so I will have an answer in a few hours hopefully.

@jimmyjones4095 2 года назад

Andy check out what the DIP switches should be set to when more than one battery is used.

@alexsimmons1803 2 года назад

I'd put the fuse on top of the bus bars. That way if you need to remove the fuse you only need undo those two bolts and it lifts straight out without having to bend the bus bars, or even having to undo them from the BMS or terminal.

@inmyimage1081 2 года назад

Thx for the tip, will be building my system using a mega fuse within the next week so it is timely advice.

@adamrucker3268 2 года назад

I'm looking forward to seeing your BMS settings it is so many choices it's a bit confusing I'm trying to I'm trying to optimize my setup but I don't believe I haven't yet I have 1 but just ordered 2 more cases Plus the power cables you can buy from them Is there real nice quality They really should let you know about them so they can up cell more product As well as the USB cable

@OffGridGarageAustralia 2 года назад

The settings of the Seplos are totally confusing. They are not in any order and it's hard to find things. It will take a while to get used to it.

@jimpanse6556 2 года назад

If something would fall on the top and bend the metal inwards, you would get a little extra protection with the black sticker, I guess.

@OffGridGarageAustralia 2 года назад

I can stand on the lid and it would not bent. If something that heavy hit's the box, not sure if a thin plastic film would make a difference.

@danielomahony7740 Год назад

I love your videos Andy :-)

@OffGridGarageAustralia Год назад

Thanks! 😃

@frederickmojako3241 Год назад

The chinese chewing gum is a thermal pad for the BMS, it will transfer heat away from the mosfets to the casing. Great video.

@JayDee25895 2 года назад

Best regards to you from Texass ✌🏻

@OffGridGarageAustralia 2 года назад

Hello Texas! 🌵🐮🤠

@AnSaTo09 Год назад

Sehr unterhaltsames Video!!! 😉 ... und informativ.

@tonydickerson999 Год назад

The 400A 80V fuse is it an HRC fuse, wouldn't want to see an arc form across it if it were to blow during high current loading.

@todamnbad 2 года назад

Hopefully we get to see mason 135AH updates soon

@hummmingbear 2 года назад

The "chewing gum" is for part of the bms to help distribute heat :)

@adamrucker3268 2 года назад

Yes Andy you need to remove the BMS and apply the heat sink material under the aluminum heat sink against the front plate

@OffGridGarageAustralia 2 года назад

Nothing in the manual about that. The BMS was already mounted.

@hummmingbear 2 года назад

@@OffGridGarageAustralia there's a video on putting it together from seplos where they mention it

@salvatorepaolella7895 11 месяцев назад

Bravo Molto bene!!!

@PabloTBrave 2 года назад

In previous videos you mentioned you weren't going to bother with compression, compression may have prevented or reduced the bulging you experienced

@sunnyfpv3694 7 месяцев назад

Hi! I am preparing to build my first lifepo4 pack and came across compression thing. So everyone tries their own methods and calculations. In the datasheet it states that compression has to be 300kgf. I am not a scientist and forgot the school physics program but Ive googled a compression force calculator, the one which would help understanding engine head tightening. As input data it requires force in N, so ive googled kgs to N conversion and it is so simple: 9.8N. Then, there is a quantity of bolts , their diameter and friction coefficient (which can probably be ignored). As a result of calculation of 3000N compression force needed, the tightening torque of 4 by 10mm rods is only 1N/m each. I am still unsure if this is correct calculation, but it seems that 300kgf isnt that much and is only needed to withstand cells deformation during cycles

@mindaugas_garuckas 7 месяцев назад

You put Main Positive busbar on tinned press nut, which is made from steel... :)

@HenningYT 2 года назад

Thank you for the show. I still hope one day a vendor will come out with an 8 battery 24V system (for EVE280 or 304).

@davidkettell6236 2 года назад

WHY ?

@sergea1138 2 года назад

seplos has a 24V version of the box for the same cells.

@HenningYT 2 года назад

@@davidkettell6236 Because I need systems that one person can handle without a forklift (Steroids and daily Gym visits are not an option).

@HenningYT 2 года назад

@@sergea1138 I just had another look at their homepage and you are right. Many thanks for pointing me into the right direction.

@mondotv4216 2 года назад

Andy - you should try to link it through the other battery by setting the dip switches? Might get comms going.

@Stemo5167 10 месяцев назад

Guess you need some nice engine hoist (Motorkran 2T ) ... saves your back and knees (from assembling battery packs on the floor).

@TheDigitalMermaid 2 года назад

You're very welcome, good sir! ^_^

@ritchycamaro 2 года назад

Hi Andy, perhaps the bms wakes up, when you put in a small charge current. You could see current on the display?

@eingeordnet Год назад

After seeing you stripping the first thread I knew why they had put the copper washers in the box for you...;-)

@DanBurgaud 2 года назад

Seplos MASON's face is on the short side of the rectangle. Luyuan also came up with a similar battery case, but the front is on the long side. BMS is per customer's specification... could be Seplos, could be JBD or JK etc...

@OffGridGarageAustralia 2 года назад

There are so many battery designs out there now. I like the choice of the BMS, that's a good idea.

@jcdcintheaz5576 2 года назад

I've built 2 of mine so far and mine came shipped just fine (I have the 200A BMS and 'so far' came with the correct cables.) I'm going to be putting out my video on assembly pretty soon. Just finished editing my solar panel/CC upgrade which (should) premier 09/01/2022. I made several comments in my video on build procedures and areas of concern/upgrade. For example, I used the bus bars that came with my cells along with the copper washers and mine had the holes for the ground screws. You're positive fuse-to-bus bar connection is wrong. Flip the horizontal bus bar that connects to the terminals. You also didn't install the heat-sink thermal pad. BTW, the manuals are on the Google drive. I'll be adding the link in my video.

@OffGridGarageAustralia 2 года назад

Thanks. I have the link to the manual they have sent before the weekend. No mentioning of the heat sink chewing gum installation. The busbar at the terminals will not fit the other way around as the flexible busbar would need to bend a lot to make it still fit. As you have seen, my kit came with a pre-assembled BMS and screen. Not sure if you have the the 280 DIY kit as well or any other version of their batteries.

@katgray4830 2 года назад

I am in AZ as well i did a pair of these with 280 ah cells. No missing parts. Followed a youtube video of theirs. All in all a nice build. A little hard to follow at first but now that i have done it i want two more kits.

@Sylvan_dB 2 года назад

With your cells already slightly bulging, the compression force is probably higher than designed. Probably fine, but good to not over tighten the front screws. I wondered if you would need to source longer screws but you found they were just long enough to engage the threads.

@OffGridGarageAustralia 2 года назад

They seems be still able to move a bit even under this fixture now, so the EVA tape does it's job I guess. I was wondering if this might be a problem for used cells which are a bit bloated already.

@tedreumer 2 года назад

I have the Same Mason box in use. I had the same problems connecting it. I think I have solved it with the driver from the google drive.

@OffGridGarageAustralia 2 года назад

But it does work with the other battery and BMS? I don't think this is a Windows 10 problem...

@andywalker2992 Год назад

Andy, its Micro ohms not milli ohms as stated @ 22.44. 16 x 30+ milli ohms is 0.5 ohms so would drop way too much voltage and not achieve the 0.5C rating of 140A discharge. Also the copper washers go on top of ring tags so the nuts don't gaul the ring tags and twist the wires to the PCB.

@Mr1Spring Год назад

It's always the same. People can't read nor interpret numbers correctly. However, Andy does truncate numbers correctly - at least better than others - they just skip the number they don't want. e.g $0.19 is truncated to be a dime. Yeah right!

@luc_libv_verhaegen 2 года назад

I think that the copper washers are there to crush slightly and to then provide a better contact between terminal and busbar. You taught us all that when using Pauls washers, the cheap chinese copper ones were malleable and therefore provided better contact.

@OffGridGarageAustralia 2 года назад

But you have Al terminals, a copper washer and AL bus bars. That makes no sense... I never used any washers under bus bars. At least I cannot remember...

@luc_libv_verhaegen 2 года назад

@@OffGridGarageAustralia You did not use washers indeed, but you've shown that the difference between Pauls busbars and the malleable chinese busbars was immense. So i think this is the same principle, the aluminium busbars are probably too stiff and will likely not adjust to the terminal surface as much as the copper washers will. Would be fun video to test this though. Another one where you spend all your time pointing your IR cam at terminals :)

@wolfgangziler6125 2 года назад

In the manual it mentions (as you criticized) to fix the nuts on the busbars with 5Nm (at position 23:30 in the video). In the seplos Erklärbärvideo the guy says 4Nm of torque. After asking my Seplos contact, he confirmed that 4Nm torque for fixing the Busbars is enough.

@dariusztomczykiewicz7482 2 месяца назад

I noticed there were squared "gaps" at the back wall of the structure so two cells at the very back are not fully supported by the wall. The are supported only on, say, edges. What do you think about that with regard to cell compression? Regards and greetings from Poland.

@gumpster6 2 года назад

Great review as always. These kits don't seem ready for prime time just yet.

@paulcurtis5496 2 года назад

Like #4, I’m back on track!

@davegeorge7094 2 года назад

Hey, they are selling these big blue cells with new terminals that are 2 instead of one fasteners! No more V drop worries.

@seymourpro6097 Год назад

Looking in other DIYSolar power places on the web you are very lucky to have actually received all the parts of your kit. Could it be improved by using another BMS from spares you had from before?

@olafschermann1592 10 месяцев назад

Connecting 2 or 3 batteries in parallell , maybe using a bus bar: between busbar and battery i would install a DC fuse or cut off switch. But then the soc and voltages would drift appart. How to handle that situation or when to reconnect? Or disconnecting the working batteries when 100% soc and then charge the offline one to 100% ?

@OffGridGarageAustralia 10 месяцев назад

This is what I have installed in my battery shelf: Battery - BMS - DC Breaker - Bus Bar Just turn on the battery banks, they will level out themselves when you fully charge. No need to balance them or so. Just ensure the voltage difference is not top high. 1-2V are fine.

@ilanozana9652 2 года назад

Very challenging

@TSiudak1 2 года назад

Hey Andy, don't know if your problem with the bms-software is solved.. I solved it by importing this 16S "agreement" XML file (16S_V20_ADDR_EN.XML) in the "Agreement"-SubFolder. After changing this "Agreement" the software must be restartet after the prompt. Maybe this would happend because of first importing the smaller XML-File for the smaller batterypack. Have fun and hopefully this was the problem and you solved it earlier.

@nunyabusiness9760 2 года назад

Making a guess here: You have a version "10D" on the 280ah Mason BMS. Even though one of the RJ45 ports is labeled "Canbus", it's not on the 10D, its an RS485 port. **I'm guessing they will tell you to use that port for your PC communication**. I didnt see what version BMS os on the 100ah unit, but my guess that it's a "10C" model. The bad news is that a 10C BMS cannot parallel communicate with a 10D BMS (in case you wanted to connect your two Masons together) according to Seplos I know this because I have two 10C models and have found that only the 10D model can communicate with my particular inverter (MPP LV6548). The 10C provides it's Pylontech interface via canbus and the LV6548 only accepts the Pylontech over RS485. Unfortunately, a firmware update wont fix this.

@sergea1138 2 года назад

You can ask for a replacement if you want to switch to a 10D version or 10C . Just don't try to install a canbus firmware on a 10D bms version or a RS485 firmware on a 10C bms version or it will brick.

@OffGridGarageAustralia 2 года назад

Great, thanks a lot for sharing these information. I will wait for their reply but will test the CAN port to connect to the computer. The whole point was to connect the two together...

@sergea1138 2 года назад

@@OffGridGarageAustralia You need same bms version to do that, and since you are using victron, it is better to get a canbus version ( 10C ) for both batteries in order to connect them with your gx controller later.

@simonharding4316 Год назад

I have a few seplos batteries connected to a sunsynk but the BMS keep dying. Killed 6 so far. Thinking of trying to install a different BMS in the case.

@picobyte Год назад

Put the Cu washers under the nut. It improves friction and mechanical properties.

@pteepan2708 2 года назад

Thank you, a other great video. Thanks again for sorting out all the problem one would run into if they were to buy and TRY build. Andy, can you recommend solar panels? Not all of us have options to used panels.

@rOSScOGITANS 2 года назад

Andy, buy an usb to lan interface, it will work, sometimes the integrated lan has conflict with other hardware of the pc

@OffGridGarageAustralia 2 года назад

It works with the other battery OK though. So cannot be a conflict on the PC.

@rOSScOGITANS 2 года назад

@@OffGridGarageAustralia all is it possible with the horrible windows! should be that the first setup with the other battery have reserved some interrrupt , anyway i suggest to try with another fisical lan on pci-e or an usb to lan intefaface with other COM

@edwardvanhazendonk 2 года назад

Hi Andy, maybe a different baud rate? Maybe try 9600, 38k, 115200.

@kevinmills5293 2 года назад

And maybe set the DIP switch address to 01 and select batt 1 in the software?

@OffGridGarageAustralia 2 года назад

Yeah, I will try that. Thanks.

@kajakfahrerr 6 месяцев назад

The chinese chewing gum should be a heatshrink between the bms and the housing. Saw that in another video of a developer

@kafa1505 Год назад

Hi Andy, love your work can you tell me why there is no review of the EEL DIY kit that is also listed on your site as it has the active balancer I wanted to know your thoughts against the SEPLOS system which i have watched all your videos on. Keep up the good work.

@GregOnSummit 10 месяцев назад

Why didn't you keep the covers on the foam, instead of sticking them to the cell? Is this the forever home for these cells?

@OffGridGarageAustralia 10 месяцев назад

Yes, the cells will stay in this box.

@Sylvan_dB 2 года назад

Your positive bus bar seems upside down. Does the flexible bar make good contact with the rigid bar sitting on top of the formed threads?

@OffGridGarageAustralia 2 года назад

It is upside down. I did this so the flexible busbar stays in its intended shape 😉

@raytry69 Год назад

23:57 Why you don't use the drill's torque regulator? The job much more quickly done with that. The scale on the drill probably foot-pounds so you have to multiply those numbers by 1.36 to get Nm.

@razvanduta3563 2 года назад

The gaps are not even because you are compressing from one side only. You are working against compression force and cells friction force against the the bottom. I have rods and compression plates at both ends and tighten them such as. In my case is a mobile application so compression & flexible jumpers is a must.

@cs1fr Год назад

Hi Andy, great video. It has inspired me to fit one of these to my house. I have already had my cells arrive and an awaiting the seplos case. I have just found out that in the UK to apply to correct these to a grid tied system I need to apply for permission and provide data sheets for all equipment including the batteries. I've tried to find the datasheet for battery on seplos Web site but can't find it. Would you know where I can get this. Sorry for the hassle but panicking now that I won't get permission.

@OffGridGarageAustralia Год назад

Yeah, connecting to the grid is always a bit... hence, my off-grid installation... What cells doe you have? Did you scann the QR code on top and find out the manufacturer? If you bought the cells from Seplos as well, they could be Higee cells and you can google the specification sheet.

@cs1fr Год назад

@@OffGridGarageAustralia hi Andy, thanks for the reply. Sorry to keep bothering you but did you ever get the Bluetooth app to work for this battery as I can't even log in?

@Dutch_off_grid_homesteading 10 месяцев назад

Heya, that's no bad that you have to wait till after the weekend. in the mean time lets do some other projects

@BeezyKing99 2 года назад

second.... nice stuffing you've been doing lately... where's your SPAT sponsor?

@OffGridGarageAustralia 2 года назад

I have many sponsors. I add them all to my homepage 😉🍺

@simonf3167 2 года назад

I would try all the available baud rates it may have been set to a different baud rate on that BMS

@lennieadi 2 года назад

Hi again Andy. Have you considered doing a test on 135ah blade battery cells from Alliexpress and build 5.0 bank with them. That would ce cool.

@Pey5531 2 года назад

Maybe the loose accessories knock of some SMD components on the BMS. I had a temperature sensor knocked of on one of my BMS, contacted Seplos and they can identify the issue immediately, I can confirm that the sensor was physically ripped off maybe by myself without noticing it because it's on the very edge of the board. So I disable it since there are multiple temperature sensor on the board and work fine. They did sent me the specs for the sensor if I wanna replace it myself. And Andy, I saw the resistance calculation and it was 0.0000375 ohm or 0.0375 milliohm or 37.5 microohm. It's would be crazy if the short of a bus has milliohms of resistance, it would have 750w of lost at 100amp per busbar.

@drewhodge3820 2 года назад

Da Da. You are my father. LOL.

@OffGridGarageAustralia 2 года назад

😂😂

@theheathkitshop2424 2 года назад

Just for shits and grins, I'd change the connection speed starting at 19.2k and go down. It's possible the communication protocol was changed, could be as simple as dip setting on the BMS. Give it a shot! All you have to lose is some time. And, I think you have the positive buss bar upside down. The two buss bars should join and not on the screw stud like you have it.

@OffGridGarageAustralia 2 года назад

Is there a second dip switch on the BMS somewhere? I haven't seen one except the one at the front. Yeah, the busbar... if I flip it, the flexible bus will bend a lot though

@theheathkitshop2424 2 года назад

@@OffGridGarageAustralia I can't tell by the video. I do know that for what little time it would take, I'd start at the 19.2k and go slower until you reach the bottom (1200 baud?) Is there a way to change the parity? I'd try that too. It won't hurt anything and the only thing you'd be out of is time. As for the bus bar, I rewatched that part of the video and I understand what you're saying. It still doesn't look right to me, but I'm no expert. If the bus bar could be made to fit the buss bar that connects the two output ports without deforming the snout out of it, I'd give it a try.

@GregOnSummit 8 месяцев назад

At 42:40 ... what about a neoprene sheet that just laid on top of the batteries ... just in case :)

@danmc1313 2 года назад

Up to the Chinese Gum bit. Isn't that some kind of heat sink for the BMS?

@OffGridGarageAustralia 2 года назад

Yes, of course it is 😉 But where does it go? There is nothing in the manual and the BMS was already mounted.

@vaughanza Год назад

Andy, can ask a stupid question, why must the batteries be so tightly fitted? Interesting that they have to be under high pressure

@OffGridGarageAustralia Год назад

The manufacturer suggests this to get the 6000 cycles out of the cells. Without compression, they will last 'only' 4500 cycles.

@PhilippeCJR Год назад

I think these copper washers do not maximize the contact area. It is limited (maximized) by the smallest area and will not increase by placing a bigger/larger washer on top... It will only add an extra resistance in my view...

@OffGridGarageAustralia Год назад

Yes, hence I left them out. Works perfectly without.