However keep in mind that there are many factors at play here so this is really only a rough estimate.
Solar panels electricity generation kwh.
Or 30 kwh 5 hours of sun 6 kw of ac output needed to cover 100 of your energy usage.
Let s estimate you get about five hours per day to generate that 30 kwh you use.
So the kwh divided by the hours of sun equals the kw needed.
On average a normal household will use around 37 kwh per day.
So if you have solar panels that each produce 1 kwh of power per day you would need a full 37 solar panels to fully power your home.
5 hours x 290 watts an example wattage of a premium solar panel 1 450 watts hours or roughly 1 5 kilowatt hours kwh.
30 panels x 250 watts per panel equals a 7 500 watt system 7 5kw.
In the year 2015 first solar agreed to supply solar power at 3 87 cents kwh levelised price from its 100 mw playa solar 2 project which is far cheaper than the electricity sale price from conventional electricity generation plants.
Thus the output for each solar panel in your array would.
So take 900 kwh and divide by the amount of kwh one solar panel produces over the course of a month 30kwh and you get a 30 panel installation.