If your electrical load was excessive it should trip a breaker or the main breaker, check your fuel filter, if its restricted the engine will not have the power and the electrical load may be more than it can handle, faulty fuel pump can also do it, I watched a guy spend all day trying to figure out why a generator, would run for a short time and die, after a 1/2 hour it would start again and run for a short time and die, I went over and pulled the dip stick on the engine and there was no oil, engine would get hot and seize up and then cool off and run again, check all the simple stuff first.
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