I want to provide a method for creating a bypass to switch from inverter power to generator power and I have to keep the neutrals isolated. This means I need a switch or breaker for the neutrals. The system is two 240v two phase inverters each with a 30a dual pole output breaker. The neutral outs from each inverter go to common bus bar. I would install the breaker between this common bus and the bus that feeds the house. I'm thinking that if I use a breaker for the neutral, I would need a 120a breaker to match the 30 amps on each leg of each inverter. 2 inverters * 2 legs each *30a each leg =120a. That correct?
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