? size solar panel
Folks: We would like to use a 12v deep cycle battery for topping off our 2 laptops, 2 kindles and cell phones. What size solar panel would be needed to keep the 12v battery charged/topped off. ...
Forum Discussion
Figure 10 ampere hours day per laptop net. Need to bump the voltage up. How are you going to do that? A DC/DC converter?
I was averaging 5.13 hours daily same latitude. Blue skies computed against max kWh potential of panels. January. With a tracker.
But a nasty skew was taking place. Losses and degradation. Just throws all the set calculations out the back window to the pig. There is solar watts inch2 differential. Summer is light years from winter - solstice. Inverter, converter, regulator, power transmission efficiency deductions.
Experiencing the error between stubby pencil with worn eraser, thoroughly crunched calculator and wadded up sheets of paper, versus reality is a very rude school of hard knocks. I used to have a motto: Do it right for 100% of the cost or do a retrofit at 130% of the cost.
I was averaging 5.13 hours daily same latitude. Blue skies computed against max kWh potential of panels. January. With a tracker.
But a nasty skew was taking place. Losses and degradation. Just throws all the set calculations out the back window to the pig. There is solar watts inch2 differential. Summer is light years from winter - solstice. Inverter, converter, regulator, power transmission efficiency deductions.
Experiencing the error between stubby pencil with worn eraser, thoroughly crunched calculator and wadded up sheets of paper, versus reality is a very rude school of hard knocks. I used to have a motto: Do it right for 100% of the cost or do a retrofit at 130% of the cost.
