Quote:
Originally Posted by hawk2100n
1/2 to 1/3 of rated output on the solar panel is about right. You are fighting physics with it mounted to the roof, seeing that the roof is slightly curved and not normal to the sun's rays. The output of the panel can be mapped as a the cosine of the angle of the panel to the sun's rays. 0 deg is head on and full output with it moving towards 0 current as you tilt it away. A lot of time the sun wouldn't get higher than 45 degrees which is .707.
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That is why I use 22+ volts (panel in sun with no load) to charge a 12 volt battery.
Normally 17 to 18 volts (panel in sun with no load) are used.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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