For convenience, let’s believe you possess a a hundred watt gadget that you would like to operate with free of charge solar power for ten hours every night.
To determine how large solar panel, batteries, charge controller and inverter it is necessary to have, observe the below conditions.
1. Estimate the amount of electricity required. 100 Watts x 10 hours = 1,000 Watt hours. Which is the absolute power that is necessary.
2. Next figure out how large solar panel you really need. Depending on a ten hour day of luminosity, the approximation is straight forward:
1,000 Watt hours / 10 hours sunlight = 100 Watt solar panel.
The simple truth is that nearly all the summer time days or weeks provide roughly 15 hours of sunshine and winter season you receive roughly 4-5 hours of natural light. Invariably select the worst case predicament for
your solar panel. On those grounds, choose a winter season day of sunshine.
1,000 Watt hours / 5 hours sunlight = 200 Watt solar panel.
(Based on normal United States daily sunlight .)
3. Calculate the optimal size of the batteries which might be essential. 1,000 Watt hours divided by 12 Volts = 83 Amp Hours of reserve battery power. 1,000 / 12 = 83.3
A typical marine deep cycle battery works nicely in this case. Choose much bigger battery to rest assured, assume 100 Amp hours power.
4. To estimate how big solar charge controller you might need, consider your solar panel energy specs, which happens to be a hundred watts divided by twelve Volts.
100 / 12 = 8.3 Amps.
Desirably choose bigger sized units, and therefore utilize a ten Amp solar charge controller.
5. Determine what capacity inverter can be used. That’s the hassle-free aspect. You might want to energize a a hundred Watt load, therefore choose an inverter which includes
no less than a hundred Watts steady power standing.