☀️ Peak sun hours in South Korea
Egypt gets outstanding sun — roughly 5.5 to 6.5 peak sun hours. Upper Egypt and the desert are highest; the Delta and north coast a little lower.
| Region | Approx. peak sun hours (annual avg) |
|---|---|
| Seoul & Gyeonggi | ~3.8 – 4.3 |
| Busan & Gyeongsang | ~4.3 – 4.7 |
| Jeju Island | ~4.4 – 4.9 |
| Gangwon (inland) | ~3.7 – 4.1 |
Use your local figure in the solar panel calculator and the energy production calculator. Background: peak sun hours by location.
⚡ Electricity prices in South Korea
Household electricity runs roughly ₩180–230 per kWh under KEPCO's tiered tariff — climbing steadily each year, improving solar economics.
💸 Incentives & net metering
South Korea runs RECs (Renewable Energy Certificates) for small solar under 100 kW plus city-level installation subsidies (Seoul, Busan, Gyeonggi). Net metering applies to smaller systems — check your one-stop REC portal for current coefficients.
💰 System cost & payback in South Korea
Local installation is relatively affordable; payback keeps improving:
| System size | Approx. cost | Suits |
|---|---|---|
| 3 kW | ~₩4,200,000 – 5,600,000 | Small home |
| 5 kW | ~₩6,500,000 – 8,500,000 | Typical family home |
| 10 kW | ~₩12,000,000 – 15,500,000 | 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: South Korea
City subsidy deadlines are the real game: Seoul and Gyeonggi release installation grants each year that run out in weeks. Owners who apply the month the budget opens effectively cut system cost by 20–40%. Fine dust is the quiet killer — modules in Seoul lose visible output within two summers if not rinsed, so plan easy cleaning access.
🧰 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, how many panels to run a house, and peak sun hours by location.
❓ Frequently asked questions
How many peak sun hours does South Korea get?
Roughly 3.7 to 4.9. Jeju Island is the sunniest (~4.4–4.9), Seoul around 3.8–4.3, and inland Gangwon about 3.7–4.1.
Is solar worth it in South Korea?
Yes — rising KEPCO tariffs, REC income and city subsidies bring payback to roughly 6–10 years.
Does South Korea have net metering?
Yes — small systems use net metering with KEPCO, and systems up to 100 kW can also earn REC certificates.
How much does solar cost in South Korea?
Roughly ₩1,300,000–1,700,000 per kW installed before city subsidies.
Note: South Korea electricity tariffs, net-metering rules and prices change frequently (and with the currency). These figures are approximate, for planning only — verify with your utility and a local installer.