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Update: I set my charger to charge at about 10 amps, and used my battery bank for a few days while waiting on my power supply to show up. I noticed little or no change to the balance of my batteries. The BMSs were set to only balance during charging above 3.4 volts per cell. I balanced each of...

LOL, Well, sometimes I don't play by the rules. :) I think I'll slowly bring the charge voltages up and see what happens.

At this point, I'm just playing with charge parameters until my power supply shows up so I can do a proper top ballance.

I just ordered 6 of the 12 volt 190 amp hour aluminum cased DIY batteries that Will recommends, and 6 of the overkill BMS's to go with them. My intent is to make a large buss bar to run my loads from, and to fuse each load appropriately after the buss bar. I will of course have a large fuse from...

News of the day. I moved the charge voltage to 13.5. When I went to bed, the batteries were at 13.47 with about 4 amps going into each battery. Ballance looked good. Now, the batteries are at 13.5, and all of them went out of balance. The worst set is .121 volts out. With the highest voltage in...

I've built six 12 volt Lithium Iron batteries. Each has it's own BMS. Do I have to remove the bms's and the bus bars when I top ballance, or can I just leave them, remove all loads and add some temporary cables to link them all in parallel while I charge them at 3.65 volts?

Thanks, that's what I was afraid of.

Thanks, I'm still learning. I have put my cells into service. I'm not happy with the way they are performing when I charged them. They went way out of balance, even though they were very close before I started charging them. That's why I decided to try top balancing. I'm hoping that fixes my...

That made me very nervous. The first time I charged, the bms shut the battery down 9 times because one cell went over voltage.

The BMS shut off the battery when the highest cell reached 3.65 volts. It keeps the battery off until the cell drops to 3.5 volts. That happened within a couple of minutes the first few times it did it. It took quite a while the last time. The other cells were somewhere around 3.3 volts. I did...

Is it safe to assume this could be worse if you're dumping a lot of amps at the batteries? I'm running duel victron multipluses. They can dump 180 amps total at my battery bank, which is 6 batteries of 190 amp hours.

That sounds like what my batteries looked like (bank of 6 @ 12 volts). They got pretty silly when they got near full charge the first time. I've let them set at 13.3 volts for a couple of days, and they seem very well balanced. I'm bringing them slowly up to 13.5 volts now, and they're still...

It's not the price that scares me. It's the space and the weight. I live in a 5th wheel, and weight is a very valuable commodity. I do actually have a dc to dc charger. I was gonna hook it up to the truck to charge my pack, but it's kinda small, so I never got around to it. It probably won't...

I built a lithium battery bank from individual cells. Each cell is 190 ah. I'm using 4 cells to make 12 volts. I have 6 of these 12 volt batteries, each one has it's own 100 amp bms. Each battery is run to a buss bar with the same length of wire. The bus bar powers duel victron multiplus...

Each battery has an Overkill Solar BMS. I have turned off "balance only while charging". I have noticed that they don't appear to balance when there is a draw on the battery, which is most of the time for my application, so I'm not expecting this to go quickly. They do ballance while charging...

Hmmmm. I'm using overkill solar BMSs. I see a charge over current setting, but I assumed that just shut the battery off if the current was too high. Is that not true? Or should I be looking for a different setting? It looks like the default setting is to shut the charge off if it's over 130...

I have two victron multipluses. 3000 12 120 Both are hooked to my main battery bank. I'd like to steal one of my 12 volt 190 ah lithium batteries from my main bank and use it to run a trolling motor. I'm aware that it would be a bad idea to hook it back up to my main battery bank when it's...