How Many Watts Does a House Use? Average, Peak, and What It Takes to Power One

The average US home uses about 29.6 kWh of electricity a day, which works out to roughly 1,230 watts running around the clock. That is the average. When big appliances run at the same time, a house can pull 8,000 watts or more for a while, and that peak is what decides the size of your generator, inverter, or battery system.

How much electricity does the average house use?

According to the US Energy Information Administration (EIA), the average residential customer bought 10,791 kWh of electricity in 2022, about 899 kWh per month. Here is what that means in watts:

Source: EIA, "How much electricity does an American home use?" (2022 data). Per day = per year / 365. Average watts = kWh per year x 1,000 / 8,760 hours.

Find your own number: your electric bill lists kWh used for the month. Divide by 30 for kWh per day, then multiply by 1,000 and divide by 24 for your average watts. A 1,200 kWh month is 40 kWh a day, or about 1,670 watts on average.

Average watts vs peak watts

A house does not draw 1,230 watts steadily. It might sit at a few hundred watts at night, then jump when the dryer, microwave, and well pump all run. Here are real numbers from manufacturer specs we have covered:

Run the dryer, microwave, and well pump together and the house pulls about 8,690 watts (6,000 + 1,480 + 1,210), seven times the daily average. Motors also pull a short burst on startup. That is why backup power is sized for the peak, not the average. See also furnace watts and space heater watts.

What it takes to power a whole house

Using the US average of 29.6 kWh a day:

• Solar: about 8.8 kW of panels at 4.5 peak sun hours (29,600 Wh / (4.5 x 0.75)). With 410 W panels, that is about 22 panels. Sunnier areas need less; cloudier areas need more.
• Battery: about 29.6 kWh covers one full average day. Most homes back up only the essentials, which takes far less.
• Inverter or generator: sized for your peak, not your average. For a whole house with large 240V loads, that usually means a 10,000 to 13,000 watt class generator or a 10 to 12 kW inverter. Our guide on what size generator to run a house walks through it.

For battery sizing in more detail, read How Big a Battery to Run a House.

How long will a home battery run a house?

At the US average draw of about 1,230 watts:

Hours = battery Wh x 0.9 / 1,230 W. Capacity and output are from each product page. The two 48V batteries need a 48V inverter that lists them on its battery compatibility list. A 12,000 W, 120/240V hybrid like the EG4 18kPV ($3,999.97) is the right size class; call us and we will confirm a compatible pairing. Running only essentials, or adding solar to recharge during the day, stretches every number above. For a smaller, expandable start, the Jackery Explorer 5000 Plus ($3,149) puts out 7.2 kW at 120/240V and expands with add-on batteries. Browse all battery backup for home systems.

Need help sizing? Call 1-888-855-7286. Send us a recent electric bill and a list of what you want to keep running, and we will size the battery, inverter, or generator for your home.

House watts FAQ

How many watts does a house use? The average US home uses about 1,230 watts averaged over the day (10,791 kWh a year, per the EIA). Peaks run much higher when large appliances run together.

How many kWh does a house use per day? About 29.6 kWh for the average US home. It ranges from about 16.9 kWh in Hawaii to about 40.5 kWh in Louisiana, based on EIA 2022 data.

How many kW does it take to power a house? On average about 1.2 kW, but your backup power has to cover the peak. A whole house with 240V loads usually needs 10 to 13 kW of generator or inverter capacity.

How many solar panels does it take to power a house? For the US average of 29.6 kWh a day, about 8.8 kW of panels at 4.5 peak sun hours, or about 22 panels at 410 W each.

What is average kWh usage per month? About 899 kWh per month for a US residential customer in 2022, according to the EIA.

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