Like I said above, connecting a GTI (+PV array) to a Sinewave inverter (to fool it),
does work, but sometimes, it can go nuts on you..
You idea of timer/charging batteries during the day, right off your home outlets isn't bad.
Just to use as a backup supply during power failures.
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I've got a large Solar backup system (plus gasoline powered gen backup)
so that I can run pumps during a 2 or 3 day (maybe a week) gird failure.
Without power to my pumps, my basement can flood..
I know, it would be easier if I moved somewhere else..