Solar & Battery Sizing Calculator

Use this free solar and battery sizing calculator to estimate the right system size for your home, see typical costs and savings, and explore how adding a home battery affects self-sufficiency and payback. Adjust energy usage, system size, and battery capacity by country to get a tailored estimate. For more accurate results and full design outcomes, use the Photonik app.

Solar Design

Energy Usage

Typical energy usage per person per day:

Low (Efficient)

~3 kWh

Medium (average)

~4 kWh

High (intensive)

~6+ kWh

Note: Actual usage varies depending on property size, building efficiency, climate, and appliances.

Daily Energy Usage: 15 kWh (~$112.0/month)

5 kWh 100 kWh

Electricity Cost

$ /kWh

Sell Price (FiT)

$ /kWh

Self Use %

lightbulb Note: These are simplified estimates. For detailed tariff inputs and advanced calculations, use the full Photonik app.

Solar System Sizing

Solar generation data:

Average Daily Generation

4.3 kWh/kW/day

Peak Month (October)

4.8 kWh/kW/day

Lowest Month (June)

3.4 kWh/kW/day

Seasonal Variation

43%

Solar System Size: 5 (21 kWh/day)

1 kW 20 kW

lightbulb We recommend 5.3 - 7.0 kW, generating 50 - 100% more than you use.

A 5 kW system can generate approximately 7809.0 kWh annually based on local sun conditions.

Solar & Energy Savings

Battery Storage