Interactive tools
Run the numbers before you speak to anyone.
Four calculators built on the same conservative assumptions our engineers use in real proposals. No email required, no results withheld.
Solar Savings Calculator
Estimate annual production, savings and payback for a rooftop array. Figures use an 82 % performance ratio and a 62 % self-consumption rate — conservative, realistic defaults.
Powerwall Sizing Calculator
How many units your home actually needs, based on evening consumption and the backup autonomy you want from your critical circuits.
EV Charging Cost Calculator
What charging at home from your own generation costs, compared with relying on public fast charging.
Energy Independence Calculator
The single number that tells you whether the design worked: what share of your consumption comes from your own roof and battery.
These tools give an engineering-grade first estimate. A formal proposal uses your actual hourly consumption data, a modelled shading horizon for your specific roof and the tariff you are contracted on.
Let's engineer your energy system.
Send us a year of electricity bills and a photo of your roof. We return a full engineering proposal with modelled production, savings and payback.