From your power bill
- Find your highest month (usually winter or summer).
- Divide its kWh by 30.
- That's your daily use. Example: 3,700 kWh in February ÷ 30 ≈ 123 kWh a day (an older house with electric heat).
From your appliances (typical, rough)
| Appliance | About per day |
|---|---|
| Refrigerator | 1–2 kWh |
| Chest freezer | 0.5–1 kWh |
| LED lights | 0.3–0.6 kWh |
| Laptop, phones, Wi-Fi | 0.5–1 kWh |
| Starlink | ~1–1.5 kWh |
| Well pump | 1–3 kWh |
| Induction cooking | 1–2 kWh |
| Mini-split (cooling season) | 3–10 kWh |
| Electric heat (winter) | 10–40+ kWh |
| Electric tank water heater | 8–15 kWh |
Numbers vary by model and habits. A plug-in meter shows your real ones in a week.
Next
Plug your number into the sizing calculator, or let a guide estimate it from how you live.
Questions people ask
How many kWh does an average home use per day?
Roughly 25–30 kWh in the US, but it varies hugely. Homes that heat and cook with gas or wood often use far less.
What uses the most electricity?
Anything that makes heat or cold: electric heat, water heaters, AC, dryers and ovens.
Get the exact setup
A few taps and you'll know exactly what to buy for your situation.