Q: why do they have to go on the roof? can't they be integrated into a landscape/xeriscape near the ground level? the south side of our house/deck is cranking hot.
A: Good question. The problem is any "hard" shadow lines (telephone line, trees, other homes, etc) on any portion of the solar array (a bunch of panels) will shut off the entire array. The array must be facing within 15 degree of due south within 5 degree of a 40 degree tilt and exposed to the sun between 9am-3pm on the winter soltice, Dec 21st. Unless you live on top of a mountain or in Oakley, the only place you can install them is on top of a house.
Bo
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