ECN Forum Forums General Topics of the Trade General Discussion Area Sizeing a whole house generator

Instead of having the generator supply the entire residence and therefore would require a transfer switch equal in size to the mains OCD, you could supply all the loads that would be considered "essential" during an outage from a separate smaller panel and therefore a smaller transfer switch. This would also help eliminate the possibility of overloading the generator as non essential / high wattage loads can not ever be supplied by the generator.

A.D