ac cools good at night but at mid day compressor cycles of and on about every 10 minutes and don't cool very well and has started tripping main breaker every once in a while,,,, cleaned the evaporator...
As said, check voltage inside RV while A/C tries to run. If voltage is below 110 VAC you found the problem. We carry a Hughes autoformer to correct for low voltage and end up using it at about 20% of the CG's we stay at.