Roger,
Next time it happens, wait 10 minutes and try again without using the crank. I if it works, it is the circuit breaker.
Tom wrote, two 40 amp breakers wired in series, I think he met to say parallel not series.
I replaced my 40 amp auto reset breaker with 100 Amp Car Audio CB, not had any more problems. If it ever pops, you have to manually reset, so you know you had a problem.
