Solar Panel Calculator for Indonesia
Indonesia's strong sunshine makes rooftop solar attractive for homes and businesses with sizeable daytime loads. This free solar calculator estimates your system size, payback and savings in rupiah using local rates and sun hours.
Calculate my solar payback in Indonesia →
Solar at a glance in Indonesia
With export limited, the best returns come from using solar power as you generate it during the day.
| Currency | Indonesian rupiah (IDR) |
|---|---|
| Typical electricity rate | Rp 1,500 per kWh |
| Installed cost | ≈ Rp 35,000 per watt |
| Peak sun hours | ≈ 4.8 hours/day |
| Export / buyback | ≈ Rp 525 per kWh |
Indicative 2026 starting points — every figure is editable in the calculator, and results depend on your own bill, roof and installer quotes.
A typical 5 kW system in Indonesia
At around Rp 35,000 per watt, a 5 kW rooftop system costs roughly Rp 175,000,000 and produces about 6,833 kWh in its first year at Indonesia's 4.8 peak sun hours a day. Your real numbers depend on your roof, shading, panel choice and how much power you use during the day — run your own figures in the calculator to see your exact payback, net savings and ROI.
How the solar calculator works
- Your setup. Indonesia and Indonesian rupiah are pre-selected, with local electricity rate, install cost and sun hours filled in. Enter your monthly bill, or size the system from your appliances.
- Your roof. Search your address or tap “use my location”, then draw your roof on the satellite map — or just type its area. We check the system fits and read local sun hours from NASA data.
- Your results. Instantly see your payback period, net savings, ROI, system size, year-1 production and lifetime CO₂ offset — compare cash vs. a loan, and download a PDF report.
Common questions — solar in Indonesia
How many solar panels do I need in Indonesia?
It depends on your electricity use, roof space and local sun hours (about 4.8 peak sun hours/day here). A 5 kW system of high-wattage panels is a common starting point for a home — enter your bill or appliances and the calculator gives your exact panel count and system size.
Does Indonesia have net metering?
PLN's rooftop-solar rules have tightened, with export credit curtailed in recent changes — so most systems are now sized for self-consumption. The appliance-based sizer helps match panels to your daytime use.
Are there solar subsidies or incentives in Indonesia?
There is no broad residential cash subsidy; the return comes from offsetting your own consumption against the retail tariff.
How much does a solar system cost in Indonesia?
A typical 5 kW system is around Rp 175,000,000 at about Rp 35,000 per watt installed. The calculator prices your own size.
Work out your system size
Not sure how big a system you need? These guides work back from your monthly usage:
500 kWh/month 1,000 kWh/month 1,500 kWh/month 2,000 kWh/month 2,500 kWh/month 3,000 kWh/month
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