Posted by jdemaris on January 13, 2008 at 09:13:30 from (72.171.0.142):
In Reply to: Solar panel/12V Batt. posted by Larry D. on January 12, 2008 at 16:17:09:
Depends a lot on where you live. I'm in a poor sunlight area of New York. My 5400 watt system averages 13,333 watts per day (yearly average). My equipment is high-tech and low-loss.
Your 15 watt panel is lower quality and your system has more loss. In this area, that panel might provide 25- 35 watts a day. There would be many days it would give zero watts.
The reality is - those cheap small panels rated 15 watts rarely put out more than 10- 12 watts to start with. You then get loss through a cheap controller (if you have one), more loss when storing into a battery, and more loss yet when you invert to AC current.
Now, if you're out in the Arizona desert somewhere, you might do a bit better.
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