How did that happen?
SOK makes a solid battery, check Current Connected, they also sell the power pro but I'm not sure it's available yet.. SS also sells eg4
This is where DIY come in, if you're already comfortable with series and parallel it seems like a no brainer unless you have codes and inspections to deal with.
Pictures please!
Right now I have everything shutdown, until I can figure out what happened. I don't want to buy just 2 more agms... although I think the 2 that died were my oldest.
Melted... its hard to see but the terminal is pretty much gone. Battery Breaker popped and my ups's started beeping
Clean and shiny. No build up of corrosion.
That was my thought also.
3 banks of 48v... the first one you have listed. Each 48v bank had a balancer on it. The balancer is for 4 batteries ea.
Did you have any type of balancer on them to maintain them in series? Like one of these? One for each series battery is what I would recommend.
I've had multiple AGM batteries have a single cell internally fail.. on UPS's that come with small AGM's mostly. I'm sure if they had been hit with enough current they would have looked like that. But being all by themselves, there was nothing to dump that much current into them.. they just got a bit warmer and wouldn't run the UPS.
That is the exact one (3 actually) I have.Did you have any type of balancer on them to maintain them in series? Like one of these? One for each series battery is what I would recommend.
Probably doesn't have a high enough amperage to balance 200ah AGM's.. now that I think about it. Was it keeping the voltages tight on them?
Yes, all batteries were within .5v of each other
