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A 10 kW solar system makes about 40.0 kWh a day at 5 peak sun hours, the US average. That is about 1,216 kWh a month and 14,600 kWh a year. In Australia it makes about 48.0 kWh a day, in Canada 30.4, in Germany 26.4 and in the UK 23.2. At US-average sun it runs a whole home with a 3-ton central AC for 6 hours, daily EV charging and an electric water heater, using 39.18 kWh.
10 kW is a large home system. It covers more than an average US home uses in a year, and it suits homes with central AC, an EV, a heat pump or a pool. Here is what it can run.
What will my solar system run?
Estimates use the formulas explained in this guide. Plan a complete system with the all-in-one calculator →
What a 10 kW system includes
- Panels: 24 × 420 W (10.08 kW).
- Roof space: about 55 m² (592 sq ft), including gaps. Many homes split the array across two roof faces.
- Inverter: a 10 kW string or hybrid inverter, two smaller inverters, or micro-inverters.
- Battery (optional): 13.5 to 27 kWh, depending on how much of the evening you want covered.
- Grid connection: larger systems may need utility approval or an export limit. Ask your installer early.
kWh per day by country
kWh per day = 10 kW × Peak sun hours × 0.8
| Country | Peak sun hours | kWh per day | kWh per month | kWh per year | Darkest month (per day) |
|---|---|---|---|---|---|
| United States | 5.0 | 40.0 | 1,216 | 14,600 | 20.0 |
| United Kingdom | 2.9 | 23.2 | 705 | 8,468 | 6.4 |
| Canada | 3.8 | 30.4 | 924 | 11,096 | 8.8 |
| Australia | 6.0 | 48.0 | 1,459 | 17,520 | 33.6 |
| Germany | 3.3 | 26.4 | 803 | 9,636 | 7.2 |
City examples: Phoenix (6.6 sun hours) about 52.8 kWh a day, Calgary (4.5) about 36.0, Toronto (3.9) about 31.2 and Munich (3.4) about 27.2. See peak sun hours.
What 10 kW runs every day
At 5 peak sun hours the system makes 40.0 kWh. A realistic whole-home mix:
| Appliance | Quantity | Hours/day | kWh/day |
|---|---|---|---|
| LED bulbs (10 W) | 21 | 5 | 1.05 |
| Refrigerator (150 W) | 1 | 24 | 1.26 |
| Wi-Fi router (12 W) | 1 | 24 | 0.29 |
| TV 43–55″ (90 W) | 3 | 4 | 1.08 |
| Laptop (60 W) | 2 | 6 | 0.72 |
| Microwave (1,200 W) | 1 | 0.25 | 0.30 |
| Washing machine (500 W) | 1 | 1 | 0.35 |
| Dishwasher (1,200 W) | 1 | 1 | 0.72 |
| Chest freezer (90 W) | 1 | 24 | 0.65 |
| Ceiling fans (60 W) | 5 | 8 | 2.40 |
| Desktop PC + monitor (200 W) | 1 | 5 | 1.00 |
| Central AC 3-ton (3,300 W) | 1 | 6 | 13.86 |
| EV charging, about 30 mi / 50 km (7 kW) | 1 | 1.3 | 9.10 |
| Electric water heater (4,000 W) | 1 | 2 | 6.40 |
| Total | 39.18 of 40.0 |
UK-style sun (2.9 hours): 10 kW makes about 23.2 kWh a day. Drop the central AC and the water heater and add a dryer load. The list then uses 21.32 kWh, still including daily EV charging.
One appliance on its own
How many of one appliance 10 kW can power at 5 sun hours. “At once” uses the about 8,000 W the panels give at noon.
| Appliance | Hours/day | How many, all day | How many at once |
|---|---|---|---|
| Refrigerator (150 W) | 24 | 31 | 53 |
| Chest freezer (90 W) | 24 | 61 | 88 |
| Ceiling fan (60 W) | 8 | 83 | 133 |
| Dishwasher (1,200 W) | 1 | 55 | 6 |
| Electric clothes dryer (3,000 W) | 1 | 16 | 2 |
| Electric oven (2,400 W) | 1 | 33 | 3 |
| Electric kettle (2,000 W) | 0.2 | 100 | 4 |
| Mini-split 12,000 BTU (1,100 W) | 8 | 8 | 9 |
| Central AC 3-ton (3,300 W) | 6 | 2 | 3 |
| Heat pump heating (3,000 W) | 8 | 3 | 3 |
| Electric water heater (4,000 W) | 2 | 6 | 2 |
| Heat pump water heater (500 W) | 4 | 25 | 16 |
| EV charging (7 kW) | 1.3 | 4 | 1 |
| Pool pump 1.5 HP (1,100 W) | 6 | 6 | 7 |
| Well pump 1/2 HP (900 W) | 1 | 44 | 8 |
EV charging on 10 kW
A daily 30 miles (50 km) uses about 9.1 kWh. 10 kW makes enough energy for four cars’ daily driving at US-average sun, and its roughly 8 kW at noon can run one 7 kW charger directly from the panels. In practice, one or two EVs plus the house is a comfortable fit. See how many solar panels to charge an EV.
Heating and cooling
- Central AC: two 3-ton systems on energy alone, or one alongside a full house and an EV, as in the mix above. See air conditioner wattage.
- Mini-splits: up to eight 12,000 BTU heads for 8 hours on energy alone. See mini-split on solar.
- Heat pump heating: a 3-ton heat pump uses about 12 kWh a day for 8 hours of heating. On an average day 10 kW covers three of them. In winter it is different. Germany’s darkest month gives about 7.2 kWh a day and the UK’s about 6.4, so winter heating still comes mostly from the grid.
Battery backup
Count 85% of a battery as usable.
| Battery | Usable energy | Evening load (1.5 kW) | Central AC (3.3 kW) |
|---|---|---|---|
| 13.5 kWh | 11.5 kWh | about 7.6 hours | about 3.5 hours |
| 27 kWh (two 13.5 kWh) | 22.95 kWh | about 15.3 hours | about 7.0 hours |
On an average US day, 10 kW can run the house and refill a 27 kWh battery. For whole-home backup including AC, you usually need two batteries. See is one Powerwall enough and home battery backup size.
Worked example: a large home in Dallas
Dallas gets about 5.3 peak sun hours.
- Daily: 10 × 5.3 × 0.8 = 42.4 kWh, about 1,289 kWh a month and 15,476 kWh a year.
- Compared with use: an average US home uses about 29 kWh a day. A home running the full mix above, with central AC and an EV, uses about 39 kWh, which 10 kW in Dallas covers on an average day.
- Surplus: on a 29 kWh day, about 13.4 kWh goes to a battery or the grid. Export rules depend on your retail plan.
- Cost: at an assumed $2.50 to $3.50 per watt, $25,000 to $35,000. The 30% federal credit (Section 25D) ended for systems installed after December 31, 2025. Leases and PPAs may still benefit from a business credit for a limited time.
See solar panels in the USA and solar panels for 1,000 kWh per month.
Is 10 kW right for you?
| Country | Typical home use per day | 10 kW makes | Share covered |
|---|---|---|---|
| United States | about 29 kWh | 40.0 kWh | about 138% |
| United Kingdom | about 8 kWh | 23.2 kWh | about 290% |
| Canada | about 25–30 kWh | 30.4 kWh | about 101–122% |
| Australia | about 15–18 kWh | 48.0 kWh | about 267–320% |
| Germany | about 9–11 kWh | 26.4 kWh | about 240–293% |
- US and Canada: a good fit for homes with central AC, an EV or electric heat. In Canada, 10 kW roughly matches a typical home over a year, and net metering in most provinces lets summer surplus offset winter bills.
- Germany: 10 kWp makes about 9,636 kWh a year, more than double a typical home. It pays off best with a heat pump, an EV or a battery, because exports earn only about 7.7 ct/kWh. At an assumed €1,500 per kWp, about €15,000, with 0% VAT on home PV up to 30 kWp. See solar panels in Germany.
- UK and Australia: more than most homes need unless you have an EV, a heat pump or a pool. Exports earn far less than grid power costs.
Common mistakes with 10 kW systems
- Not checking export limits. Some networks cap how much you can send back. Check before you buy.
- Running heavy loads at night. EVs, water heaters and pool pumps should run on timers in the middle of the day.
- One battery for whole-home AC backup. A single 13.5 kWh battery runs a central AC for only about 3.5 hours.
- Assuming summer output in winter. In the UK and Germany winter output can drop to about a quarter of the average.
FAQ
How many kWh does a 10 kW solar system produce per month?
About 1,216 kWh a month at US-average sun, 1,459 in Australia, 924 in Canada, 803 in Germany and 705 in the UK.
Can a 10 kW solar system run a whole house?
Yes, over a year it makes more than an average US home uses. At night and during outages it needs a battery, and in winter you still use some grid power.
Can a 10 kW solar system run central AC and charge an EV?
Yes. A 3-ton central AC for 6 hours (13.86 kWh) and 30 miles of EV charging (9.1 kWh) together use about 23 kWh, leaving about 17 kWh for the rest of the house on an average US day.
How many panels are in a 10 kW system?
About 24 × 420 W panels, on about 55 m² (592 sq ft) of roof.
Related guides
- What Can a 5kW Solar System Run? kWh per Day, EV Charging, AC and Appliances
- What Can a 1kW to 20kW Solar System Run? kWh per Day and Appliance List
- What Can a 3kW Solar System Run? kWh per Day, Appliances and Battery Backup
- What Can a 1kW Solar System Run? kWh per Day for Cabins, RVs, Sheds and Backup
Sources and further reading
- NREL PVWatts Calculator: solar output estimate for any address.
- U.S. EIA: How Much Electricity Does an American Home Use?: average household use, about 10,800 kWh a year.
- Alternative Fuels Data Center: Charging EVs at Home: home charging levels and power.
- U.S. DOE Energy Saver: Air-Source Heat Pumps: how heat pumps and ductless mini-splits work.