I've been thinking of getting these, I did a DIY solar generator with the R5 and its been working great, I did a video on it and I couldn't have done it without your thorough explanations so thank you
One reason I can offer why people would want these boards (I was one of them) is to re-configure existing packs to fit current needs/goals. I now have four 100Ah batteries that are put together as two 200Ah packs (each pair has its own BMS). I started out with two 50Ah batteries, and changed direction. I was able to hook up the 50Ah batteries with a 100Ah battery and BMS, but it was kludgy and not clean at all. I wanted to join the 50Ah batteries as one 4s2p 100Ah battery and have two 100Ah batteries in parallel on one BMS. That managed to happen through an unfortunate circumstance that was handled very well. These two 200Ah packs paralleled to a 1000w (for now) or possibly 3000w inverter will handle the load I want to use them for now (emergency power for my servers), I can get the load to 800W or so to run on the 1000w inverter, or if I get a 3000w inverter, it would be able to run my entire 1400w load no issue - at 12v, the entire load would be about 120A total or 60A from each pack, which they're certainly capable of. My ultimate goal is to use them for a 'home brew' UPS using one of the various inverter/charge controller units like the GrowWatt or similar (need to figure out the best option), so it makes sense to re-configure these batteries to 24v or 48v with the different top boards, rather then buying more, since I already have 4.8kWh of storage, which exceeds my two 'flaky' APC UPS's by a factor of four. The only thing I'd suggest is it would be really nice if they could be bought from you, even it it's a bag of parts that need to be assembled. The reason being the minimum order quantity from PCBWay. In my case, if I choose to go to 24v, I only need three 24v boards, not five, and/or if I go to 48v, I only need two. If you order 500, and the boards and other parts cost you $5 each, and you sell the board(s) and parts for $15-$20, that's a win all around - you make a few extra dollars, I don't order more boards than I have use for.
I'm in the middle of a solar generator build, small one. But man these would save so much trouble and look great. But there still kinda spendy for me.👍👍👍
So if I accidentally burnt out one of the traces for the BMS connector on one of my boards... ...can I just order one extra board the next time I buy some of these batteries?
Hi Jehu - Thanks for your content and helping us DIY'ers with our projects! Do you have plans to sell the A123 cells individually or prepackaged (like the SLM24 on your website)? Also do you have any spec sheets on the cells (electrical and mechanical attributes)?
I have not looked at the GERBER Files, but it looks like you have a pad across both + and - of each cell. Is this not a direct short on each cell or high risk of a direct short on each cell?
I bought 4 of the 12v 100amh batteries and the recommended bms. Originally we hooked all 4 in parallel to make a 12v system. Now I want to hook 2 sets of 2 batteries in series them parallel them to make a 24v system. How do I hook up the bms? Do I have to buy another bms and use one bms for each pair of the batteries?
To set up a 24v system, do you recommend connecting 2 batteries in parallel first then connecting them in series or connecting 2 batteries in series then parallel them? Does it affect the bms one way or another? And where do you connect the charge controller battery +/-?
@@jehugarciaNot in my opinion. They won't carry enough current. You need proper busbars. Technically you could join these packs together in parallel but you won't have much flexibility with pack size.
