I have a 48v 20Ah battery (LiFePO4) that I need to test the capacity at at least 20Amps.
It’s no problem with my 12v 100Ah battery because I can use my dummy load tester at 10Amps for that Watts = 12v x 10amps = 120watts
But with the 48v battery watts = 48v x 2.5Amps = 120watts.
I don’t have anything in my toolbox that can do that. Not at 20 amps.
I do have a few of those 150amp battery monitors and a few others with shunts, but nothing specifically for a 48v battery.
What’s the easiest way to do this given the above? Resistors? Shunt?