It has happened at 6000' and 80-90° and 2700' and 90°.
It's been a while since I looked but the wattage is 1800-2000 (depending on temp and voltage). The locked rotor amps are 63, which could be what it's pulling when the compressor "stalls" while running.
This is my 6th season with this setup. It's a new issue and not ambient temp related.
I also realized I didn't add that it always starts fine, with minimal voltage drop and no issues regardless of what else is running. It's just something that causes a voltage drop while running that does it.
I did also notice one other thing once. During one "incident" the compressor seemed to shut itself off. No overload protection or circuit breaker trip. I went and cycled the thermostat to enable the compressor delay and sat up on the roof next to the A/C. After the compressor delay ended I heard the relays click on the unit but it wasn't until about 2 minutes later that the compressor started. It started without issue. It makes me think there is a thermal switch???
I also don't hear a steady increase in amperage from the unit. It's an all or nothing increase.
EDIT: Just to clarify. It feels like if there is a slight voltage drop from a new load that the compressor "stalls" and thus is pulling locked rotor amps.
What I am not sure is if it's being caused by one of the two generators or from the compressor/run capacitor.... or something else.