Many power companies offer grid-tie (net metering) hook-ups and some do not. Those that do charge all their customers a fee for it (hidden in the monthly bill).
A run-of-the-mill solar grid-tie system is required to shut-down whenever the grid shuts down. So just when you need the solar the most - you have nothing. Adding a battery bank allows a grid-tie system to wired in such a way that it can be made to work when the grid is out. Also - with no batteries - if the grid goes down at night or a cloudy day - no sun means no power.
Batteries are a huge expense that always go bad at some point. It would be nice to find a way to avoid them. In Holland - excess solar electric is used to run electric motors making compressed air in huge tanks. Later when needed - the air is let out and it spins turbines making electric power. Not exactly cheap, I'm sure.
Jennifer's L16 Trojan batteries are cheaper then mine. I was not allow to use Trojan because when something is partially funded by tax incentives -a requirement is a minimum of a 5 year warranty. Trojan would not give a 5 year warranty . So I was forced to use Rolls-Surette from Canada.
Note that one factor that remains unseen. If power rates take huge hikes into the future - we solar owners will be making out pretty well.
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Today's Featured Article - Show Coverage: Journey to Ankeny - by Cindy Ladage. We left Illinois on the first day of July and headed north and west for Ankeny, Iowa. Minus two kids, we traveled light with only the youngest in tow. As long as a pool was at the end of our destination she was easy to please unlike the other two who have a multitude of requirements to travel with mom and dad. Amana Colonies served as a respite where we ate a family style lunch that sustained us with more food than could reasonably fit into our ample physiques. The show at Ankeny
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