I have two GT Inverters. One has a 3KW string, and the other a 5KW string. I am getting tired of having to buy at night and rainy days. If I convert the 3KW system to batteries, can I have the best of both worlds? I want to use all I make to run the house and charge the batteries. At night I want to use all I can from the battery system, and not supply the grid. I own everything. I think I can cancel net-metering whenever I want. Suggestions?