mppt vs pwm

jrnymn7 wrote:
"If you cover the roof with panels you will be making your own shade."

Provided the panels are well above the roof and well ventilated. Otherwise it would be much like the heat build up that occurs in an attic. Just running an attic fan, and no a/c, can lower house temperature significantly.

I'm looking into actually harvesting this solar heat for winter under-floor hydronic heating. There are solar panels available with built in heat exchangers/collectors. In summer, the heat would be exhausted to the outdoors using a fan/heater core combination.

I covered the roof with 1/2" plywood raised 4 inches above the roof. It knocked 6 degrees off the 104F. Very few days the sun stays vertical. The stupid ground radiation is nothing to fool with either. It's mean and running for the trees is not an option. Panels on the roof and trees don't get along either. A coconut a green one, the size of a laundry basket with the weight of a bowling ball don't bounce too good offa glass. Even a falling dead frond will take out a panel.

You don't have that problem up there and you don't have 86 degree January days either. A park with good electrical hookups is an oxymoron. They do not allow A/C. But in the shade it is near paradise (in the winter). Boondocking with a few wrinkles and warts.