Search results

I did a top balance with all cells getting to 3.63v using a power pack, rebuilt and plugged into bms, shunt and inverter and within minutes voltage dropped to 3.42v across the board, all within 0.05v. When plugged into the inverter the voltages never seem to get above 3.43v (even if I charge for...

So you wouldn't worry about 0.5v difference between cells? Bms says its pulled 280ah at this stage from a 320ah battery. Unless the cells I received were actually 280 and not 320? I have set the inverter to stop discharging at 10% but it does seem to be going to 0% on the bms and my shunt.

I'm not usually I only turned it on to bring that one back in line on this one occasion as the differences were large and I was worried it would damage the battery. I did a full top balance the day after this and turned balancer back to 4.5v. First cycle after this it did the same thing

I turned the battery off when I spotted it. At that point it was 280ah out of 320ah

Yes correct. Location is negligible as they are all together inside (so temp is always room temp) yes positive cable output is from cell 16 and the bms requires 2 wires to attach to 16, plus the victron shunt is attached to 16 so total 4 wires. The bms was reading correct when I checked a month...

All the wires and connectors are new and batteries are inside so no oxide at all.

Connection was and is good. Have taken apart to top balance to reassemble and same issue. This is the first cycle after top balance and hit 0.5v difference after being 0.005 for the rest of the range

No, only happened because that one cell

So after 3 days of top balancing and moving cells. Used today for the first time and did the same thing. 0.005 difference at 3.63v all good at 50% when I checked then came back a few hours later and had 0.5v difference.... only to cell 16, same as before. I did swap cells around so it's not a...

Thanks, I'll perform another top balance too and check. I don't think my cells have charged past an average 3.42v since having them (according to jk bms) but my victron shunt reads about 0.02-0.03v higher so assume that's correct, my inverter reads lower so its a bit of a guessing game. I think...

I have changed the balance V back to 3.45v and started charging the battery. The power seems to go all into that cell and is quickly re-aligning to the other cells. I will swap the cell as advised and see what happens

Hi, I've recently installed 16s 320ah diy battery with jk bms with 2A active balencer into my grid tied solar system. At first everything seemed to be working correctly and the cells were all balanced and within 0.01v over several cycles. I checked the cells a few days ago and noticed the uvp...

Rookie error, I did a lot of research, noted down which one I wanted (was the lv) came back to it weeks later, found the one I wanted (except it was missing lv after it) I didn't notice, ordered and installed. Battery wouldn't work, trying to figure out why and realised I had bought the hv...

Hi all, I have a diy 48v 320ah battery bank and have just bought a solax hybrid inverter. I need 80v min for the inverter to work with the battery. I have 4.7kw of solar so need to be able to discharge and charge the batteries using the inverter. Is there anything I can do to increase the...

Hi all, Im new to the DIY battery side of things and have built a 320ah battery using 16x3.2v grade A cells. I have added a JK-B2A24S20P BMS with RS485 converter which after some research seemed to be the best option as it has a 2a active balancer and has both CAN and RS485 inputs. I already...