I have the SmartSolar MPPT 100V 20 amp 48-Volt Solar Charge Controller that is connected to a 50ah LIPO battery and connected to an audio amplifier via its load terminals. I measured an amp draw of 1.75 DC amps while connected directly to the battery, although I'm not sure what the initial surge current is. The controller turns off the load instantly when I try to power the amp via its load terminals. The amp works fine directly connected to the battery. The problem occurs whether I have the panel connected or not. It does work OK with a much smaller load, such as a small motor.
I've seen lots of posts about this problem, but don't understand how to solve it. Does this need some type of soft-start circuitry such as an NTC thermistor? If so, how do I determine the value and where do I purchase? Or what about a circuit which powers the amp from the battery initially, and then transfers power to the controller? Also, some other controllers have a setting to turn off the load shutoff monitoring, but I don't see that with this one.
I've having trouble understanding why this isn't something built in to the controller itself. Any help would be greatly appreciated!
