The house I'm buying is new to me but was built in 2004-5. I'm going to try to make it "net zero" by putting as much PV on the best oriented roof face as can fit. Then doing enough other retrofits such as air sealing and additional insulation to reach net zero. The house just got re roofed with conventional shingles and has 12/12 pitched roofs with 16" OC rafters. Questions: Has anyone used the "PV Stealth" racking system? Has anyone used the "standoff" rack mounting system from esolarwharehouse.com? Key feature of the "standoffs" is elimination of traditional flashing by using a rubber gasket and sealant on the hanger bolt that penetrates the rafter (the hanger bolt is a 3 1/2" x5/16" lag screw on one end and a 5/16-18 bolt on the end where the stand off is attached between the lag end and the machine thread is a 1/2" hex used to drive the lag into the rafter). One thing that might need improvement is that these standoffs use a 1.5" dia sealing washer, I could instead use the 3" dia sealing washers that Quickbolts use but those cost $2.44 each. Is a 1 1/2" dia EDPM sealing gasket good enough? Key feature of the "Stealth" rail system is NO CLAMPS, the panels slip into the racks and thereafter gravity holds them. Comments Please!
Note I'm using the standoffs to "raise" the array above the roof to "cool" the panels and position them over the roof vents.
Other details of my "plan" are 52 ea. Silfab 320 W 60 cell panels, 52 ea. Solar Edge 320W optimisers, 2ea. SE 7600HD invertrers.
Note I'm using the standoffs to "raise" the array above the roof to "cool" the panels and position them over the roof vents.
Other details of my "plan" are 52 ea. Silfab 320 W 60 cell panels, 52 ea. Solar Edge 320W optimisers, 2ea. SE 7600HD invertrers.
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