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Read this before acting on any number you see here.
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Results are estimates
Every figure produced by an EnergyTally calculator is an estimate. It is derived from the inputs you provide and from default assumptions that are representative, not exact. Real outcomes depend on your specific equipment, location, weather, usage patterns, utility tariff, incentives, financing and installation quality — variables a calculator cannot fully capture.
Not professional advice
Nothing on this site is financial, investment, tax, legal or engineering advice. We are not your advisor. Before you buy a solar system, EV, heat pump, battery or any other product, or make a financial decision based on a result here:
- Check the calculation’s assumptions and edit them to match your situation.
- Verify prices and rates with your own utility and suppliers.
- Get quotes and a professional assessment for your property.
- Confirm current incentives and tax credits for your location.
Our commitment to accuracy
We take accuracy seriously: every formula is published on its methodology page, every default value is tied to a dated source, and the calculation logic is unit-tested. That makes our estimates transparent and checkable — but it does not make them guarantees.
Use at your own discretion
You are responsible for how you use these tools and any decision you make. Use the results as a starting point for your own research, not as a substitute for professional judgement.