Hello all, I have a MP 12/2000 which is faulting on A/C compressor starts. I have three DC inputs:
- Two 170ah LiFePo batteries configured in parallel for 12v
- 800w of solar through an MPPT controller
- 165amp engine alternator
The issue happens when the A/C compressor turns on - during hot weather. The MP faults then comes back on. During cooler weather (80dF), the A/C compressor can turn on but you can hear the inverter struggling. I have installed a hard start capacitor on the A/C and have degreased the current draw by close to 45% - down to 34amps @ 120vac on start. Then it goes down and runs at 6-8amps.
To me it's obvious that I didn't take into account the starting amps on the compressor when I went with the 12/2000.
My question, is this: will the 12/3000 -really- be enough? Or will it struggle too at higher temps? At 104dF, the 12/3000 is rated at 2.2kw with surge being 4.4kw. The surge that I am getting on start is about 4kw. The idea is to run the A/C off the inverter using the engine alternator (I will be upgrading it to a 300amp one shortly) and it can be running for hours at a time.