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Old 05-08-2018, 06:37 AM   #21 (permalink)
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16% capacity factor already is amazing considering the poor weather we have been having.

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Old 05-08-2018, 12:48 PM   #22 (permalink)
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Right - an average of 38.3kWh / day is okay, but not great. We have hit as much as 68kWh in one day.

The estimated annual total for our system was just shy of 13MWh. If we stay at the 38.3kWh / day average, that is almost 14MWh for the year.
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Old 05-08-2018, 01:58 PM   #23 (permalink)
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Lovely looking house and location Neil.

Did you build the roof pitch to optimize power generation, or to shed snow?
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Old 05-08-2018, 02:13 PM   #24 (permalink)
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Quote:
Originally Posted by redpoint5 View Post
Lovely looking house and location Neil.

Did you build the roof pitch to optimize power generation, or to shed snow?
I built the 12 pitch roof to get the most roof space I could reasonably get. It happens to be ideal for winter production, and yes snow shedding off is also important for winter production. My brother's system is on a 5 pitch, and that works better in the summer, but he has to clear snow with a long handled snow rake. Which is non-trivial work.
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Old 05-08-2018, 02:20 PM   #25 (permalink)
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I built the 12 pitch roof to get the most roof space I could reasonably get.
Can you share a "before" photo? Just curious to visualize what you described.
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Old 05-08-2018, 02:40 PM   #26 (permalink)
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Wait, no solar hot water?
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Old 05-08-2018, 03:38 PM   #27 (permalink)
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Probably better off installing more PV and running a hot water heat pump.
Depending on your homes lay out and where you live, some where cold like MA installing solar hot water can be a real pain because you have to run glycol and run these lines where you don't normally run water lines. That means you could be tearing out walls through 1 or 2 floors in a typical new England style home if your water heater is in the basement.
Actually I would only go through the trouble of thermal solar if I was going off grid and wanted to futlrther reduce my propane bill.
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Old 05-09-2018, 08:29 AM   #28 (permalink)
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I have a heat pump water heater.
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Old 05-09-2018, 08:33 AM   #29 (permalink)
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I was thinking more along the lines of Gary's $1000 solar water heater. The plumbing isn't extensive, but you do need space in the basement.

It beats turning the sun's heat energy into electricity, storing that, and then turning it back into heat again.
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Old 05-09-2018, 08:44 AM   #30 (permalink)
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I will upload pictures of the old 8 pitch hip roof when I have access to them.

Solar heat collectors with vacuum tubes are pretty good. Maybe someday.


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Last edited by NeilBlanchard; 05-09-2018 at 08:49 AM..
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