Solar savings estimator

See the commercial case before detailed design.

Use editable planning assumptions to estimate system size, annual generation, savings and simple payback. Final results still require a site survey and engineering review.

Planning assumptions are editable and are not utility quotations.

Your inputs

CountryCityAverage monthly electricity bill (RWF)Electricity tariff (RWF/kWh)Average outage hours per dayUsable roof area (m²)Peak sun hoursEstimated PV cost per kWp (RWF)Estimated battery cost per kWh (RWF)Include battery backup

Preliminary result

Recommended PV range2.9–3.5 kWp

Estimated battery capacity2.6 kWh

Estimated annual generation4,756 kWh

Estimated annual savings1,440,000 RWF

Simple payback3.8 years

Estimated bill coverage100%

The usable roof area supports the preliminary size.

Estimate only. Final sizing depends on hourly loads, shading, equipment efficiency, battery strategy, local tariffs, taxes, installation scope and applicable standards.

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