☀️ Peak sun hours in Indonesia
Indonesia's equatorial climate gives steady sun year-round — roughly 4.5 to 5.5 peak sun hours, with drier eastern islands higher and the wettest regions a little lower.
| Region | Approx. peak sun hours (annual avg) |
|---|---|
| Nusa Tenggara & the east | ~5.2 – 5.7 |
| Java & Bali | ~4.7 – 5.3 |
| Sulawesi | ~4.7 – 5.3 |
| Sumatra | ~4.4 – 5.0 |
| Kalimantan (wettest) | ~4.2 – 4.8 |
Use your local figure in the solar panel calculator and the energy production calculator. Background: peak sun hours by location.
⚡ Electricity prices in Indonesia
Grid electricity from PLN is billed by customer class, commonly around the equivalent of $0.10–$0.11 per kWh for many residential tariffs. Because power is relatively affordable, the strongest solar case is for higher-consumption homes and businesses that self-consume during the day.
💸 Incentives & net metering
Indonesia has a rooftop-solar regulation administered by PLN, but the export/credit terms have changed over time and at points limited or removed net-export credit, pushing systems toward self-consumption. Rules continue to evolve, so confirm the latest PLN rooftop policy before sizing anything that relies on exporting surplus.
💰 System cost & payback in Indonesia
Rough planning guide (grid-tied, self-consumption):
| System size | Approx. cost | Suits |
|---|---|---|
| 3 kWp | ~$2,200 – 3,600 | Small home, daytime use |
| 5 kWp | ~$3,500 – 5,800 | Family home / higher use |
| 10 kWp | ~$6,500 – 11,000 | Large home / small business |
Work out your own numbers with the ROI calculator and the bill savings calculator, or design the whole system with the system report builder.
💡 Local insight: Indonesia
Indonesia's sun is steady and abundant, but the economics hinge on policy: with affordable PLN tariffs and export rules that have tightened, the best returns come from sizing a system to match your daytime use rather than to export surplus. For the thousands of islands without reliable grid access, off-grid solar-plus-battery is often the practical way to get power at all.
🧰 Solar tools
Plan your system with these:
- Solar panel calculator — how many panels for your usage and sun hours.
- Solar bill savings calculator — how much you'll save.
- ROI calculator — payback period.
- Battery calculator — if you want backup.
- Full system report — design the whole system in one page.
Related reading: solar panels in hot climates, grid-tied vs off-grid vs hybrid, and how many panels to run a house.
❓ Frequently asked questions
How many peak sun hours does Indonesia get?
About 4.5 to 5.5, steady year-round due to its equatorial climate. The drier eastern islands are higher; the wettest regions like Kalimantan a little lower.
Is solar worth it in Indonesia?
For higher-consumption homes and businesses, yes — sized for daytime self-consumption. Affordable PLN tariffs and changing export rules mean self-consumption usually beats relying on export credit.
Does Indonesia have net metering?
There is a PLN rooftop regulation, but export/credit terms have changed over time and at points been limited, favouring self-consumption. Confirm the latest PLN policy before installing.
How much does solar cost in Indonesia?
Roughly $3,500–$5,800 for a 5 kWp home system. Get local quotes.
Note: Indonesian PLN tariffs, rooftop-export rules and prices change over time. These figures are approximate, for planning only — verify with PLN and a local installer.