Solar savings calculator
Estimate system size, installation range, savings, and payback for a Philippine property.
Updated 2026-07-15 · Formula version is shown with every result.
Data confidence
Early estimate
Evidence used
Uses your bill, rate, target offset, daytime use, shading, system type, and degradation allowance.
What can vary
Roof orientation, local weather, export rules, equipment losses, and installer design must be verified.
Your inputs
Use realistic values. Nothing is sent to an ad network.
Your estimate will appear here
Results include ranges, supporting metrics, formula version, assumptions, and warnings.
How this estimate works
SolarGabay uses pure, versioned TypeScript formula modules. The calculator normalizes inputs, rejects invalid values, and presents planning ranges instead of false precision.
Results are decision-support estimates. Confirm utility rates, supplier specifications, site conditions, and professional requirements before committing money. Review the methodology and source policy before treating any estimate as decision-ready.