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In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
New solar install with flaws!
So here we go..... I pay $3000 a year for winter heat in a newer home. I decided in November to install 120 evac tubes on the garage roof. I was doing this on a tight budget, $4400 invested so far.
I use the hot water provided to preheat my DHW. My storage tanks also have a top coil that I return my radiant floors (my only heat source) through as long as the tanks are greater then the floor return temp. Then to the internal coil in my propane DHWT.
I used 3/4" copper for the panels BUT then I switched to PEX to get down the wall, outside (buried) and into the basement. I plan on using my controller to shutdown at 175F to stagnate the panels. My 2 expansion tanks(4gal) are on the copper side mounted in the top of the garage about 6 feet below the panels. One supply and one return side. system pressure is 15psi.
I am looking for a few things from you helpful people.
1. Bets on how the PEX will last
2. System efficiency
3. How would you add another storage tank and plumb in if I was going to get a 80gal non working hot water tank(no exchanger). I have lots of open controller function yet.
Thanks to all,