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About SolarMath
A free, no-bullshit solar calculator built for Australians who want realistic numbers — not sales pitches.
Why I built this
Most solar calculators are built by companies trying to sell you something. They use optimistic assumptions, ignore hidden costs, and conveniently forget that batteries don't always make financial sense.
This calculator uses probability-weighted scenarios to show you the range of likely outcomes — not just the best case. It accounts for panel degradation, battery replacement, inverter costs, and the realistic utilization rates that other calculators ignore.
Get in touch
Questions, feedback, or spotted an error in the methodology? I'd love to hear from you.
Legal stuff
The boring but important bits:
- Privacy Policy — How we handle your data (spoiler: we don't sell it)
- Disclaimer — This calculator provides estimates, not guarantees