However keep in mind that there are many factors at play here so this is really only a rough estimate.
Annual kwh per solar panel.
In a high yield solar area like central colorado which receives annual insolation of 2000 kwh m 2 year such a panel can be expected to produce 400 kwh of energy per year.
If you have limited roof space the best recommendation is installing the most efficient solar panelsavailable.
To figure out how many kilowatt hours kwh your solar panel system puts out per year you need to multiply the size of your system in kw dc times the 8 derate factor times the number of hours of sun.
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.
11484 kwh per year as a reference point a kilowatt hour is equal to 1 000 watts of power being used for one hour.
For oregon and washington it is slightly lower.
On average a normal household will use around 37 kwh per day.
200 watt solar panels no shading from trees mounted flat and in an ideal south southwest direction this type of solar system would be able to produce 1 kwh per hour of sunlight or 5 kwh per day.
You can use the table of solar power production per kw for each state above to do the same math for your state.
However in michigan which receives only 1400 kwh m 2 year 1 annual energy yield will drop to 280 kwh for the same panel.
The average household in the united states uses around 10 400 kwh each year.
How many solar panels do i need for 1 000 kwh per month.
Given 1kw of panels produces 1642 kwh per year in ca and 1kw of panels takes up 68 42 square feet solar panels installed in california on average produce 23 99 kwh kilowatt hours per square foot per year.
This will maximize the watts installed per square foot compensating the area limitation.
For those wondering how we estimated those numbers for energy consumption and required number of solar panels here s the breakdown.
So if you have a 7 5 kw dc system working an average of 5 hours per day 365 days a year it ll result in 10 950 kwh in a year.
We also assumed that the average household consumes about 10 400 kwh per year and the panels we re using are 250 watt solar panels.
Energy information administration in 2018 the average monthly electricity consumption for a home in the united states was 914 kwh per month or about 30 5 kwh per day and 11 000 kwh per year.
10 812 kwh per year washington.
5 hours x 290 watts an example wattage of a premium solar panel 1 450 watts hours or roughly 1 5 kilowatt hours kwh.
How to calculate your own solar panel estimate.
For the sake of example if you are getting 5 hours of direct sunlight per day in a sunny state like california you can calculate your solar panel output this way.
