So if you have a solar panel that with a 10 watts power rating and it is exposed to sunlight for at least 6 hours.
How much from solar panel to battery.
For our experiment 5 hours of direct sunlight without clouds x 6 amps generated per hour 30 amp hours per day that the solar panels are generating to recharge our rv batteries.
So to recharge them from 50 would take 17 hours with a 100w panel.
You can get the amount of energy it will provide the battery by multiplying 10 watts by 6 hours which will give you 60 wh.
Before you can determine if installing a solar battery makes sense you ll need to know the price.
If our 100w solar panel generates 70w every hour it will take a little over 17 hours to generate 1200wh 1200wh 70w.
Assuming we get 5 hours of direct sunlight we know a 100 watt solar panel will produce 30 amp hours per day.
Panel power in watts battery capacity in watt hours x 2.
How much do solar batteries cost.
Solar batteries range from 5 000 to 7 000 and from 400 dollars per kilowatt hour kwh to 750 kwh.
We perform better than this on our own panels and battery combinations on clear sky days but this is a more realistic estimate for less than perfect days.
Like solar you can think of the costs as both a gross price and a price per relative capacity.
6 watt solar panel charging a 4 000mah 3 7v battery time 14 8wh 6 watts x 2 4 9 hours.