Originally posted by nevetsyad
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New 9.6kW solar install in Northern VA
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Wait, you're doing the Dominion power selling program? They give you $.15/kWh for everything you produce...but they send you a check for it and you have to pay tax on it. So, it's like you're getting 11-12 cents per kWh. Dominion does support net metering, that's what we did, you can simply request that a smart meter be installed with net metering enabled. No additional income to claim on your taxes, just less kWhs to be billed for.Leave a comment:
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Originally posted by J.P.M. View PostKeeping the cart before the horse before design details, did you do a load analysis to figure out what array size might offset how much of your electric bill in the most cost effective or whatever way your priorities take you ?
One other preliminary design decision: Are you aware that a 6" standoff vs. the 3" will probably allow the array to run cooler and thus have a higher probability of a somewhat greater annual output ?
As far as the roof standoff, my HOA approved my design with the stipulation that the panels have a "low profile, mounted flat on the roof"Leave a comment:
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Originally posted by Ne0eN View PostThank you, I'll look into Flashfeet. As far as the AC disconnect, if I were to install the SolarEdge inverter outside my garage, would that eliminate the need for additional external AC disconnect? The 7600A-US includes RapidShutdown switch that deenergizes the system within 10s. (in compliance with NEC 2014 Rapid Shutdown code 690.12) Any pros/cons of keeping it inside vs. outside?
The SE7600 does not come with an AC disconnect. It has a DC disconnect built in. Check your local code for requirments of locking AC disconnect.Leave a comment:
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Originally posted by ButchDeal View PostThat is a little more than I would put on a 7600.
I would consider the Ironridge Flashfeet instead of the quickmounts
What are you using for an external AC disconnect?
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Keeping the cart before the horse before design details, did you do a load analysis to figure out what array size might offset how much of your electric bill in the most cost effective or whatever way your priorities take you ?
One other preliminary design decision: Are you aware that a 6" standoff vs. the 3" will probably allow the array to run cooler and thus have a higher probability of a somewhat greater annual output ?Leave a comment:
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That is a little more than I would put on a 7600.
I would consider the Ironridge Flashfeet instead of the quickmounts
What are you using for an external AC disconnect?Leave a comment:
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New 9.6kW solar install in Northern VA
Hello,
I'm in the final stages of designing my DIY home grid-tie solar system and just wanted to run it by you guys to see if I'm missing anything. The basics are as follows: 35x 275W (CS6K-275M) for a total of 9.625kW. SolarEdge SE7600A-US inverter with 35 P300 SolarEdge optimizers. Twenty-nine (29) of the panels are facing South (170°) the remaining six (6) are facing West (260°). Two strings divided equally 18/17. String 1 will run at max 4,950-5,040W @350V --> 14.4A. String 2: max 4,675W-4,760W --> 13.6A. Existing electrical panel rated at 200A/240V. All wiring will be running in conduit inside the attic all the way to the attached garage (less than 60'). For the racking, I'm planning on using IronRidge XR100 rails on QuickMount Flashing E-mounts, although I'm open to other options. I'd prefer to be no more than 3" off the roofing surface. My main south roof is 33° pitch and the west side roof is 45°. The roof material is asphalt shingle. My next step is drafting up some diagrams/plans and applying for building and electrical permits. Already have applied for my local power company (Dominion Power) Solar Purchase program and have local HOA/town approvals. Hoping to start construction end of September with switch on date October 1st. Any other suggestions or advice?
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