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Solar Roof Calculator

See how many panels fit on your roof and what they save.

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LEIN project Tangkuban Perahu · Bogor · 9 kWp

Discover Jakarta’s solar potential.

Solar irradiance (GHI)Clear-sky model (Haurwitz) for Jakarta. Irradiance is lower on cloudy days.
Solar irradiance (GHI)Clear-sky model (Haurwitz) for Jakarta. Irradiance is lower on cloudy days.02004006008001,000Most productive hours06:0009:0012:0015:0018:00W/m²02004006008001,000Most productive hours06:0009:0012:0015:0018:00W/m²

Local time (Asia/Jakarta)

Example: a 45 m² roof in Jakarta

12.1 MWh / year

Energy produced*

*Assuming 45 m² of roof

20.6 million rupiah / year

Electricity bill savings*

*If all of it is used on site, at the R-⁠2/R-⁠3 tariff of Rp1,699.53/kWh

Annual output of rooftop solar in Jakarta, according to published studies: Tarigan, AIP Conference Proceedings 2470 (2022); Environmental Research, Engineering and Management 80(4) (2024). Assumes 14 panels of 720 Wp on a pitched roof, about 3.2 m² of roof each (LEIN data). PLN tariffs for October–December 2026. No credit for power exported to PLN (Minister of Energy and Mineral Resources Regulation No. 2 of 2024).