01-22-09, 02:27 PM | #31 | |
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ie I'm currently consuming by night what I'm producing in one week... Happily in summer I'll produce daily around 75% of my daily consumption Remarks :
Denis.
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01-22-09, 03:04 PM | #32 | ||||||||||||||||||||||||||||||||||||||||||||||
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We are not living in the same place (so different amount of clouds), but roughly at the same latitude. jwxr7's system is 280Wc while mine is 3000Wc. To compared I divided the Wh by Wc. jwxr7's system is currently 2.46/0.9=2.72 times more efficient. 1st law for a DIY PV : build the installation to be able to optimize orientation and horizontal angle Happily in winter I'm loosing 40% while in summer I'll loose only a few%. My system will also pay for itself thanks to incentives and selling rate. Denis.
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01-22-09, 03:17 PM | #33 |
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Is "Wc" (in kWh/Wc) a measurement of the capacity of the panel in Watts? Its peak theoretical output in ideal conditions & perfect alignment?
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01-22-09, 03:32 PM | #34 | |
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Denis.
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01-23-09, 02:20 AM | #35 |
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Stumbled across this file yesterday doing some research; should help newbies like myself-
EERE PV Guide35297solar.pdf Hope my cut/paste worked....... |
01-23-09, 03:22 AM | #36 | |||
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Quote:
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01-23-09, 08:10 AM | #37 |
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Thanks for clearing that up, Denis.
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01-23-09, 10:28 AM | #38 |
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I was wondering what Wc meant too. Thanks for asking Darin.
One thing that will limit my production on sunnier days is my inverter. It maxes out at 200w while my panels could potentially be making 240-280 watts. This was the best grid tied scenerio I could come up with using my old panels though. One sunny day last weekend I was able to witness what was probably the inverter running into it's max power level several times. The sun would emerge from clouds and the power would quickly climb until it reached the 200w level. I never saw a level above 202 watts. I can imagine that in the summer it will be maxed out many hours a day. |
01-28-09, 07:41 AM | #39 |
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here's the last 7 days production (jan 21-27)
Wed, 820whrs Thurs, 340whrs Fri, 200whrs Sat, 1280whrs Sun, 460whrs Mon, 680whrs Tues, 680whrs |
01-28-09, 09:14 AM | #40 |
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That's neat Jamie.
Know what makes me sad? I have a little 12v peltier cooler that I occasionally use on my sailboat in the summer. If memory serves, it draws 4A, or 48 watts and is not very efficient with that power. That's 1152 watt hours per day to run continous - which your array could have supported for 1 of those days (assuming power storage ability).
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electric, solar |
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