On Fri, 27 Jul 2007 19:37:37 GMT, Lew Hodgett
wrote stuff
and I replied:

snip

I agree largely with you Lew, but I reckon that you are being a bit
_generous_ with the solar panels' capabilities.

Solar:

For an engineering estimate, use a 2ftx4ft,80W panel which translates
into 10W/sq ft.

Derate 50% for dirt, clouds, angle of attack, etc, thus 5W/sq ft.

As a year around average use 12 hours/day, thus 12hours(5W/sq ft))=60
watt-hours/sq ft/day.

60watt-hours/12volts=5amp-hours/sq ft/day.

To generate 250AH of solar you need 250/5=50sq ft or at least 7
2ftx4ft panels.

Human bevaviour: Bestiality with a brain