I no mathematician either, but I know what the FMA lab 8 reads out, when the charge screen show 40 amp out put the power supply input screen shows, 25.2 volts in at 20.1 amps, my buddy runs a FMA lab6 it show exactly the same thing. I have checked with an amp meter and the FMA is reading right on the money
If you read the fine print of most chargers the only way to get the ratings of the charger is to run 18-24 volts (depending on the charger).
None of them put out high watts at 12 volts.
Most chargers only charge 6S if you charge 6s (22.6 volt ) @40 amps that is 904 watts, well under the 24v -1130 watt rating, theres not many 40amp output chargers out there.
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