I have a 3s12p pack with a bms. I don’t what calculation to sort out how many amps 36 batteries pull but I can guarantee it’s going to exceed 10amps if deeply discharged. Even if it did only draw 10amp I don’t want anything running at max capacity with no wiggle room.
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Your original statement was 3s4p. With that configuration I stand by my statement that at 10 Amp each cell would be taking 2,5 Amp.
The 3s12p is quite different. In that case at 10 Amp each cell would be taking 833 mA. Within range.
If you can guarantee that what the hell is all this discussion about. USE A BIGGER CAPACITY METER.
Everybody has been telling you you can’t just put a shunt across the 10 Amp unit and expect it to be accurate. Try if you like but if successful in getting anything to work this meter and shunt will read far less than actual as a fair bit of the current will be going to be through the shunt and not the meter.
At the recommended Maximum charge rate of 0.5C the constant current stage of a 3s12p would be 15.6 A.
Or maybe go for a meter that will handle the max output current of your PSU.
Cheer Bob
PS. You may well consider calculations to determine what is required before rushing in with unsuitable components.
Cheers once again. Bob
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Thanks to all those that actually read my response and responded accordingly. Turned out to be a faulty unit. Replaced with new cheap Chinese unit and back in business.
Cheers
Mat
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Thanks for letting us know the outcome.
Cheers Bob
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