Built by the team behind Solar Proof — a suite of calculators, viewers and product directories used by Australian households and CEC-accredited installers every day.
Get an honest estimate of system size, year-1 savings, payback period and 25-year net savings. Optional battery modelling. No sign-up wall.
Open the Solar CalculatorCalculate solar STCs by postcode and system size, plus the federal Cheaper Home Batteries Program rebate (live since 1 July 2025).
Calculate STCs Homeowners & installers SearchableSearch 2,800+ solar panels, inverters and batteries from 270+ brands — find datasheets, warranties and spec sheets in seconds.
Browse brands & models For solar businessesUpload an interval data file (CSV/XLS) and generate a quick usage report — peak demand, time-of-use patterns and yearly totals.
Generate report For solar businessesGenerate a clean, professional solar installation invoice — built for accredited installers and small businesses.
Open invoice creator For homeowners FeaturedPostcode-accurate savings, system size, payback period and 25-year net savings — with optional battery modelling.
Calculate savings For commercial buyers New10 – 500 kW systems for businesses & industry. IRR, NPV, payback, peak-demand reduction, STC vs LGC eligibility — with a commercial-flagged lead form.
Open commercial calculator For commercial buyers NewVictoria only. Estimate the VEECs and rebate revenue an eligible 30–200 kW commercial solar system earns under the Victorian Energy Upgrades program.
Estimate VEEC value Homeowners & installersCompare home batteries by capacity, brand, chemistry and warranty. Tesla Powerwall, BYD, Sungrow, Sigenergy and more.
Browse batteries