How many solar panels for a 50 m² (540 sqft) home
A small 540 sqft home uses 1500-2500 kWh/year. Needs 4-7 panels. Here's the real math with examples.
Small homes (studio, apartment, tiny home) are the easiest to cover with solar. Low consumption and accessible roof typically reach 100% self-consumption with small investment.
Average consumption
1 person in 540 sqft with fridge, washer, TV, low electric heating: 1500-2000 kWh/year. 2 people with summer AC: 2000-2500 kWh/year. Heat pump heating: add 1500 kWh/year.
Panel calculation
2000 kWh/year ÷ 1500 kWh/kWp/year (US average) = 1.3 kWp. That's 4 panels of 410 W. Less sunny zones (Pacific NW, NE): 5-6 panels. Sunbelt (AZ, FL, TX): 3-4 panels.
Roof space
4 panels take 86 sqft (22 sqft each). On a studio or attic with minimal roof, plenty. No private roof? 800 W balcony solar kits (2 panels) cover 50% of consumption.
Cost and investment
1.5 kWp installed kit: $3000-4000. With federal tax credit and state rebates: $2100-2800 net. Payback: 5-7 years. After: 20+ years of nearly-free power.
What about battery?
For grid-tied small home with net metering: NO battery yet. For pure off-grid (remote cabin): 5 kWh battery and 6 panels. For occasional outages: 2 kWh hybrid battery is enough.
Compare with 100 m² home and apartment.
Want to know how much energy your appliances use? Calculate it here.
Open calculator