hi ,i have couple of questions if you could help me. 1 ) i wonder is there any device that you guys recommend that can measure the solar power that i'm making during the day , the voltage i consume and how much i need to draw from domestic grid in order to work things smooth all day long ( the electrical devices shouldnt notice from the electricity comes from : grid/solar power ) 2) the other question is , is anyone tried to use a supercapacitors instead of batteries to charge and use in the solar system that he got. where can i find material on it ? thanks in advance.