? 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. ...
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so 25 hrs yields 0.11 KWh of my daily laptop use Dell inspirin 3000 series.
tomorrow I'll see what the 40wh batt needs to recharge. over/under 50wh?
One recharge a day would be plenty for me and to make it simple, in AZ where on ave a properly tilted panel collects 5000 wh/m2/day on average, ya take the 40wh battery and double that to 80 wh / 5 and need a 16w panel to keep up. The 10wh cell phone batt would need another 4w panel, that's 20w for a laptop and phone. That explains the WOW! a 80ah batt would have a few poor solar days of capacity.
tomorrow I'll see what the 40wh batt needs to recharge. over/under 50wh?
One recharge a day would be plenty for me and to make it simple, in AZ where on ave a properly tilted panel collects 5000 wh/m2/day on average, ya take the 40wh battery and double that to 80 wh / 5 and need a 16w panel to keep up. The 10wh cell phone batt would need another 4w panel, that's 20w for a laptop and phone. That explains the WOW! a 80ah batt would have a few poor solar days of capacity.
