Try this tool free, or use the fully featured Photonik platform with integrated design and proposals.
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.
5 kWh100 kWh
$/kWh
$/kWh
%
lightbulbNote: 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%
1 kW20 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
Calculating...
Old Bill (Before Solar):Monthly:-|Annual:-
New Bill (With Solar):Monthly:-|Annual:-
Monthly Savings
$0
Annual savings: $0 | Bill Savings: 0%
Battery Storage
Solar Battery Sizing
0 kWh30 kWh
lightbulbTip
A 0kWh battery will make you about 0% self sufficient.
Calculating...
Estimated Solar & Battery Price
(Before any rebates)
0
%
Adjust tax rate if needed
Energy Self Sufficiency Calculator*
Calculating...
Lowest Month
-
-
Annual Average
-
Year-Round Estimate
Highest Month
-
-
Lowest Month Details
Annual Average Details
Highest Month Details
Note: Self-sufficiency varies significantly by season. The annual estimate is a simple average of best and worst months.
*Note: This calculator provides simplified battery self-sufficiency estimates. For accurate per-hour
simulations, use the full Photonik design tool.
Design your solar and battery system. Size your solar, estimate costs, savings, rebates and battery self-sufficiency.
