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Use "H37C Generator" to search. Link below is one example. I have discussed this at length with several H37C owners. We all agree a generator has to go where the hot water tank presently resides. There are two types of diesel generators. One simply spins an alternator and keeps your batteries up. These are less expensive but do not give you the high draw 110v you would need for air-conditioning. That requires the more expensive units that generate AC and allow you to run all your 110v appliances AND charge your batteries.