Solar panel inverters?

I want to plug my solar system battery bank into my transfer switch on my cabin when not using a generator. The transfer switch will handle 220 volt from my generator. How do I get a 220 volt inverter that runs 60 hz or do all of them run 50 hz. I see plenty of 120 volt 60 hz. I'm at the point of needing to... show more I want to plug my solar system battery bank into my transfer switch on my cabin when not using a generator. The transfer switch will handle 220 volt from my generator. How do I get a 220 volt inverter that runs 60 hz or do all of them run 50 hz.

I see plenty of 120 volt 60 hz. I'm at the point of needing to order one and I'm not sure.
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