11-23-13, 11:39 PM | #11 | |
DIY Geek
Join Date: Apr 2013
Location: Sunny Florida
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Quote:
I have 20 panels on the roof. As a result, I have two trunk cables with 10 panels each. I transition from the two Enphase trunk cables to two 4 conductor TCER cables with sunlight + oil resistant jackets on the roof in a Hubbel-Weigmann 8x6x4 fiberglass panel. The two circuits of TCER go down through a weather head to a 6x6x4 Carlon box in the second floor attic where I transition to the twin runs of 10-3 UF. Those twin runs combine in a Square-D QO 100A panel and run via 6 gauge THWN to a 30A breaker in my service entrance panel where I ultimately feed the house or the net meter to the grid, or both. I figured with 10AWG running from the second floor attic to the combiner panel, even if I some day in the future upgrade my panels to new more efficient designs with 2x the power output, I'll still have adequate wire for the task without serious resistance losses. Just looking at my Enlighten page, I'm running 109% of PV Watts estimated on my lifetime (since August 1, 2013) using a 0.96 DC to AC derate factor. Last edited by where2; 11-24-13 at 12:02 AM.. |
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The Following User Says Thank You to where2 For This Useful Post: | stevehull (11-24-13) |
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