The answer to this question depends on where your house is and how much electricity you use. The best way to get the answer for your home is to use the solar panels estimator above. However, if you are looking for average data that isn't specific to your home then this article will help you work it out.
How many solar panels are needed to run an average sized house in my state?
Over the last 40 years, the average size of an American home has increased by almost 1,000 square feet to around 2600 square feet.
The average amount of power used by a home in each of the main solar markets in America is listed below. Of course, your house may use more or less than the average but this is a guide:
What is the average amount of electricity used in an American home in 2018?
|State||Monthly electricity usage in each state kWh (source www.eia.gov)||Annual Average Electricity Usage (kWh)||Annual Production from 1kw of solar panels (kWh)||Required solar system capacity to run the average household in each state(kW)||Number of 60 cell 275-285 watt solar panels required to power the average house in each state||Number of 72 cell 350 watt solar panels required to run the average house in each state|
|Arizona||1 030||12 360||1 752||7.05||25||20|
|California||547||6 546||1 550||4.23||15||12|
|Connecticut||711||8 532||1 150||7.4||27||21|
|Florida||1 123||13 476||1 351||9.98||36||28|
|Massachusetts||599||7 188||1 150||6.25||23||18|
|New York||595||7 140||1 230||5.8||21||17|
|South Carolina||1 156||13 380||1 350||9.91||36||28|
|Texas||1 156||13 872||1 360||10.2||37||29|
|Utah||750||9 000||1 570||5.7||21||16|
However, this data is a little distorted for states like New York and California because of the high percentage of multi-family buildings in these states.
Unfortunately, there are not statistics kept specifically for freestanding homes but it is likely that if there were then the usage would be higher than the average for all homes.
You can use our solar panels cost calculator for your state to work out how much the number of solar panels quoted in the table above for your state will cost.
Although before you do this it is worth taking note of how the size of your home and your electricity usage varies from the norm as this will ultimately determine the number of solar panels you need.
How many solar panels do I need to power a 2000 square foot house?
This is probably the better way to determine the number of solar panels you would need to zero out your power bill. However, it is still not a simple equation because a 2000 square foot will use different amounts of power depending on several factors including the climate of the region, if the home has a pool and whether the home uses electricity or gas for heating. So the data below is our best guess based on the stories we hear from solar companies in each region.
|State||Monthly electricity use for an average 2000 square foot home in each state in kWh||Annual Average Electricity Usage kWh||Annual Production from 1kw of solar panels in each state (kWh)||Required solar system capacity to power a 2000 square foot home in each state (in KW)||Number of 60 cell 275 watt solar panels required to power the average 2000 square foot house in each state||Number of 72 cell 350 watt solar panels required to run the average house in each state|
|Arizona||1 200||14 400||1 752||8||30||23|
|California||800||9 600||1 550||6||23||18|
|Connecticut||1 000||12 000||1 150||10||38||30|
|Florida||1 300||15 600||1 350||12||42||33|
|Massachusetts||800||9 600||1 150||8||30||24|
|New York||750||9 000||1 230||7||27||21|
|South Carolina||1 200||14 400||1 350||11||39||30|
|Texas||1 240||14 880||1 360||11||40||31|
|Utah||890||10 680||1 570||7||25||19|
How much solar would I need for a 3000 square foot house?
It is hard to know if the relationship between the size of solar system you need to power your whole home and the square footage of your house is linear. Many larger 3000 square foot homes are newly built homes and so they have better insulation and more energy efficient appliances. However, they are also likely to have more luxury fixtures and appliances such as swimming pools and hot tubs.
In reality, the amount of solar panels needed for a 3000 square foot home will vary greatly but for a ballpark guide you can simply add 30% more to the number of panels and system sizes quoted above for a 2,000 square foot home.
Get live pricing from solar installers in your area
The table above shows the average number of kWh’s (kilowatt hours) of energy produced each year by 1 kW of solar panels installed on a south facing roof in each of the listed states. You can find out how much is produced in the other states, (and even down to a specific city in the states listed below), by using our solar panel calculator.