Calculators
No-login tools for EVs, solar, and battery storage, using tariffs and prices from your country.
Part of The long sunrise, the whole argument, from the first fire →
Zero-bill home calculator
Size a solar + battery system for your home. Find out if you can zero your electricity bill using real tariffs, real BESS products, and your actual household load.
Shared residential BESS
Model a community solar + battery system for condos and apartments. See per-unit savings, developer ROI, payback periods, and bulk discount impacts.
EV vs ICE, total cost of ownership
Compare the 5-year and 10-year cost of an electric vehicle and a petrol equivalent. Fuel, maintenance, depreciation, and incentives are included.
Solar payback calculator
Enter your roof size, local solar yield, and electricity tariff to get an accurate payback period and 25-year savings projection.
EV charging cost calculator
Estimate your monthly and annual charging costs based on your EV's battery, local electricity rates, and daily driving distance.