ExcessEnergy.au · Transparent decision support
New to solar or already exporting for cents? Map out your options in one plan. Includes current rebates, break-even dates, and optional quote checking.
Start here
Diverter, battery and solar all feed on the same exported kilowatt-hours, so adding one shrinks what the next can save. This planner allocates your surplus once, prices each path with current rebates, and shows when every option breaks even — over 1 to 25 years. Paste in a real quote and it checks that too.
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What you'll see
Or drill into a single question
30 sec
The annual gap between what your exports earn and what the same power costs you to buy back.
Run it2 min
Our most thoroughly checked calculator. It'll tell you when a diverter doesn't make sense for your setup.
Run it3 min
Side by side with the 2025 federal rebate factored in, and the reasoning spelled out in plain language.
Run itInteractive
Month-by-month generation, modelled on real weather data. Works whether you've already got panels or are still weighing them up.
Visualise my solar yearDon't have solar yet?
Most of this site assumes you've already got panels. If you haven't, start here: a postcode and a rough bill get you a ballpark on size, generation, and savings.
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