ExcessEnergy.au
Honest decision-engine for Australian solar households. You've got solar. Feed-in tariffs are rubbish. What's your single best next move?
Start here · 3 minutes · one form, three answers
So what should you do about your solar exports?
The single question every solar household with a few thousand dollars to spend is asking. Enter your setup once; we'll rank the options in the order they actually pay off — for your setup, not a generic household.
Show me what to do →Or drill into a single question:
Quick check · 30 seconds
What's my solar export worth?
The annual gap between what your exports earn and what they cost the grid to deliver back. 5 inputs.
Run it →ROI calculator · 2 minutes
Will a hot water diverter pay back for me?
The deepest of our calculators — parity-tested against an independent Python implementation. Tells you honestly when a diverter doesn't make sense.
Run it →Decision tool · 3 minutes
Battery or diverter — which one first?
Side-by-side comparison with the 2025 federal battery rebate factored in. Plain-language reasoning on which one wins, and why.
Run it →