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I think it will work just fine and I might have done it a different but I work long hours sometimes so I wanted something completely automated for my wife. I already have too much stuff that goes down on occasion like the internet.That sounds fantastic so this thing is starting your 4 ton ac? Is that a 15 KW solark ? Yeah the best I can hope for here Oklahoma is a zero Electric bill and even with the zero bill you still have to pay the $15 a month hook up fee so the cheapest my bill will ever be will be $15. I wished I had solar for the last decade but I have had three different UPS systems over the years All Battery based with big Transformer inverters. I'm totally with you on the All or Nothing. The fronius grid tie system I'm going to install at 12.5 KW will be able to power the whole house without issue I'm pretty sure one sw5548 will power my house. When I built it 10 years ago I made it superficient it's 2x6 everything in the house is energy star. I'm rural as well also have a well pump I have a 3.2 ton AC that only uses 30 amp breaker with 10 gauge wire. I bought a soft start for it I'm pretty sure one sw5548 would start it without the soft start but I'm going to make it easy for the inverter and everyone seems to say that they also save power over time. I will do a amp test before I install the soft start just to see how much difference it really makes. I have an interlock for my breaker panel if the grid goes down and the grid tie with it I can switch the entire breaker box to the backup system or while the grid is on I can switch those eight circuits back and forth. That's the plan anyway. I will be attacking the wiring from the generator room to the breaker box then the transfer panel will be added to allow me to switch back and forth between the two inverter systems.