I like the UPS since I use Sicce pumps and will also run some other minor equipment on the battery
The ups will not properly charge a lipo battery. I suggest using agm car batteries. A single 94r or 49 series agm battery is about 10x the capacity and can easily be installed anywhere- just extend the 2 wires..
The ups will not charge it properly and agm battery is much, much more stable(safe). Especially if water is involved. People don't realize a lipo fire is almost impossible to put out. A few years ago, around here, a Tesla got in a accident and caught fire. The firefighters couldn't put it out so they had to use the firetruck to push it into a retention pond to let it burn itself out.
I was wondering if the built in lipo bms would do the trick.The ups will not properly charge a lipo battery. I suggest using agm car batteries. A single 94r or 49 series agm battery is about 10x the capacity and can easily be installed anywhere- just extend the 2 wires..
I use 4 100ah car batteries wired to my apc 1500va ups. It will provide 500-800w for 18 hours+. It charges/ maintains it just fine
Not sure how the bms would integrate with the ups as they don't simply put out voltage to charge. They are sensing the battery condition and adjusting as it goes(much like the lipo bms). It might work though...
If you do, might be a good idea to add a 12v 4" pc fan, in the ups, to keep it cool during extended use. Alternatively I bought my apc smart ups1500 for $100 with bad batteries(vs. 400-700 new).
Its funny cause the big server ups cabinet batteries are actually just a ton of 12v in series/parallel. So I just take them apart, find the bad one, and recondition the rest for other uses.
Having different branded batteries in parallel is not the best for performance or safety, especially in one's house:The ups will not properly charge a lipo battery. I suggest using agm car batteries. A single 94r or 49 series agm battery is about 10x the capacity and can easily be installed anywhere- just extend the 2 wires..
I use 4 100ah car batteries wired to my apc 1500va ups. It will provide 500-800w for 18 hours+. It charges/ maintains it just fine
We should have a battery safety talk some day soonThe ups will not properly charge a lipo battery. I suggest using agm car batteries. A single 94r or 49 series agm battery is about 10x the capacity and can easily be installed anywhere- just extend the 2 wires..
I use 4 100ah car batteries wired to my apc 1500va ups. It will provide 500-800w for 18 hours+. It charges/ maintains it just fine
With properly sized DC rated fuses and circuit breakers to protect the series parallel chains.
No actually. I think I still have one whole APC UPS 48V server tray in the garage untouched. None of the other ones had anything except the batteries in a metal tray, and the plug. Unless the actual UPS has something, the battery trays did not.
It depends on the configuration of the string and its individual series and parallel segments and cell capacities. So cell capacity, total current capability, and output voltage of each segment and the combined segments. Without getting into a lot of math or failure modes, protection must be used if the potential fault current exceeds wire gauge or plate capacity. Smaller arrays like your example APC cabinet rely on internal resistance of wire and the cells to limit fault current. In theory a shorted cell can’t drive enough current through the small array to create a cascading failure. As such, they often omit individual fuses, while larger or parallel systems require them to prevent backfeed and overcurrent damage or cascading catastrophic failures.
