In order to calculate the below data we averaged annual kwh production in the top 12 solar states and assumed standard 250 watt panels in order to calculate how many panels you would need.
Flat roof square feet per kw solar 100 per kw.
For example some brands like sanyo and ge typically produce over 200 watts per panel while other brands will produce under 175 watts for a similarly sized panel.
The average cost to install solar panels is from 10 626 to 26 460 after tax credit for a 6kw to 12kw system to power an entire house.
The average solar panel produces 148 48 watts per square meter of space but you can choose panels that produce more or less electricity depending on the brand and your budget.
That s about 500 550 kilowatt hours of energy per year from each panel on your roof.
4 how does that compare to your annual energy usage.
With energy prices on the rise this may be the perfect time.
Is 5kw 5000 watts so you can use that as a benchmark if you re unclear on what your power needs will be.
The average system size in the u s.
But at 20 watts per square foot a system rated to produce 2 kilowatts would cover roughly 150 square feet while a 3kw system would take up about 225 square feet.
Considering 6 peak sun hours per day and 300 watt panels you need 16 to produce 700 kwh each month.
If you have limited roof space the best recommendation is installing the most efficient solar panels available.
Finding out how efficient solar panels are.
The average solar panel payback period is 7 to 12 years and solar energy saves 600 to 2 000 per year on electricity costs.
The solar roof tiles cost 2 85 per watt and the inactive shingles cost 5 60 per square foot.
Each solar installer has sophisticated software that can spell out your house s exact power needs while looking at historical weather patterns roof angles and other factors to tell.
Tesla estimates that a 10kw solar roof will cost a total of 33 950 including incentives.
System size kw square footage needed for low efficiency 16 square footage needed for medium efficiency 18 square footage needed for high efficiency 22 5 kw.
Multiply 5 hours of sunlight x 290 watts from a solar panel 1 450 watts or roughly 1 5 kilowatt hours per day.
This will maximize the watts installed per square foot compensating the area limitation.
Let s say on a good day you average 5 hours of direct sunlight.
Most solar panels last for 50 years have a 25 year warranty and start generating a return on investment after 8 years.
The actual total cost of a tesla solar roof will depend on the size of your home and your monthly energy usage.
