If you have one 250 watt panel receiving four hours of sun then you will get 1 000 watts or one kwh per day from that panel.
Solar roof kwh per day.
That s about 500 550 kilowatt hours of energy per year from each panel on your roof.
If you have 33 panels assuming a 30 day month you will get 1 000 kwh per month.
On average a normal household will use around 37 kwh per day.
4 how does that compare to your annual energy usage.
Let s estimate you get about five hours per day to generate that 30 kwh you use.
Or 30 kwh 5 hours of sun 6 kw of ac output needed to cover 100 of your energy usage.
Assuming a 30 day month an electricity generation of 1 000 kwh is equivalent to 33 33 kwh per day if the site gets 6 peak sun hours per day you need 5 56 kilowatts since no energy conversion system is perfect you cannot assume the solar array will deliver its theoretical production.
However keep in mind that there are many factors at play here so this is really only a rough estimate.
If you have four panels you will get 4 kwh per day.
Let s say on a good day you average 5 hours of direct sunlight.
So how many square feet of your roof will your pv solar system cover.
Multiply 5 hours of sunlight x 290 watts from a solar panel 1 450 watts or roughly 1 5 kilowatt hours per day.
Because of the variables pinning down exact numbers is tough.
The us ranges from about 4 hours 6 hours of sunlight per day on average see the below map.