Calculators & tools
Your home. In numbers.
Quick estimates, useful comparisons and practical checkers. Start with the question you have.
A good place to start
What size battery could work for your home?
Your spare solar and later electricity use give a useful starting point. Then check what a bigger battery would add.
Find your starting sizeIn this example, spare solar after losses is 10.8 kWh, capacity after reserve is 12 kWh and electricity used later is 10.5 kWh. The smallest, 10.5 kWh, is the daily delivery.
Three limits. One useful amount of energy.
Daily delivery in this example:
10.5 kWh
A useful estimate. A clearer next step.
Each tool explains its method and assumptions. Use the result to frame your next conversation, then check the details for your home.