I need to protect my 48V batteries from too deep a discharge. However, the batteries also need to supply more than 100A at peak. Can I use two use Smart Battery Protect 48V-100A in parallel (the output connecting to my load)? Thanks.
asked
Two Battery Protectors in Parallel
Using a BP-220 is the more straightforward approach.
edit: oops. 220 not viable because of voltage limits. Might need to think about a heavy duty VSR if your peak loading is sustained > 30seconds.
See following thread
for a bit more info on associated risks of running 2 units in parallel
What kind of loads are you supplying?
I'm reconfiguring my battery packs from 24V to 48V to drive a larger inverter. 6kW. My battery pack will range from 40V at 10% to 48.8V at 100%. the 48V-100A will get me 4000W to 4880W so I'm significantly short if I want to run at capacity, or even fairly close.
So, 30kWh lithium battery back will be connected to the inverter. It is the only load it will be carrying. The charging circuit does not go through the battery protects; they are used purely as extra insurance the battery are never discharged below 40V.
Thanks,
Dale.
I wouldn't do it. Use a contactor instead. Plan on a precharge mechanism for the times when you need to start the battery back up. (Use a lightbulb, if you like.)
BP was designed for simple DC loads with no inrush component. It also fails closed, which is the exact opposite of what you want.
