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Message: <blockquote data-quote="LDUBS" data-source="post: 517643" data-attributes="member: 21536">As I understand it and put simply, when the sun is out, you are for all intents and purposes using the solar power generated by your panels.  When it isn't, like at night, you are on the grid.  A credit is provided for the difference between what you use and what you solar panels feed to the grid.  Having battery storage means less use of the grid, so significantly lower utility bills.  Sounds great, but according to my utility company's worksheet, adding batteries would more than double the cost of the system.   Even without batteries the savings in the utility bill can be pretty significant.  At least, that is what I hear from family and friends who have solar.  But the systems are expensive to buy so the break-even might be many years down the road.</blockquote>