If I were you I'd look at solar. A guy I know locally did this and he runs his whole (i think 500gallon, who knows when they're that big) SPS tank on it. Plus he powers his tv, modem/router and a few other things with it. He said it cut his power bill from like 500 a month to like 200 or something. Don't have to worry if power goes out since it's always hooked up to solar. This is the route I'm going to go. That way it automatically works if power goes out since it runs off of batteries charged by solar. And if its cloudy and not enough solar, batteries get charged by house electric. Now if solar doesnt work and power goes out then you could by time with the battery power until getting home to turn on generator to keep batteries charged. He runs radions, T5's, huge skimmer and all pumps off this setup. I'll see if I can find his link.