☀️ Peak sun hours in Taiwan by region
Peak sun hours (PSH) is the number of hours per day the sun delivers 1000 W/m². Taiwan averages about 4.2–4.5 PSH — good, though the island's humid, typhoon-prone climate brings more cloudy days than a desert. The southwest (Kaohsiung, Tainan) is sunniest; the northeast (Keelung, Yilan) is cloudier. Summer production is strong; typhoon season calls for well-secured mounting — a design factor local installers know well. See our guide on peak sun hours by location.
| Region | Approx. peak sun hours (annual avg) |
|---|---|
| Kaohsiung & the southwest | ~4.5 – 4.7 |
| Tainan & Pingtung | ~4.4 – 4.6 |
| Taichung & the centre | ~4.2 – 4.4 |
| Taipei & the northeast | ~3.8 – 4.1 |
Use the exact figure for your area in the solar panel calculator and the energy production calculator.
⚡ Electricity tariff and solar support in Taiwan
Taiwan Power Company (Taipower) runs a progressive residential tariff: roughly NT$2.6/kWh for the first 120 kWh, rising to about NT$7–9/kWh (~€0.20–0.25) at the top blocks — high by Asian standards, and air conditioning in Taiwan's long, hot summers pushes households straight into those top blocks. On the support side, Taiwan has paid strong feed-in tariffs (FIT) for rooftop PV and still runs rooftop incentive programmes toward its national solar target. A solar system sized for your summer AC load removes the most expensive kWh first. Estimate your saving with the solar bill savings calculator.
💡 Why rooftop solar is so common in Taiwan
Three forces: top-block tariffs are expensive, FIT and incentive programmes cut effective cost, and Taiwan's dense cities mean rooftops are the only free land. Rooftop PV on apartment buildings is organised through building-management communities, and the buyback schemes make small systems straightforward. Payback for a well-sized rooftop system commonly lands around 5–8 years. Read our guide on solar panels in hot, humid climates — very relevant to Taiwan's summers.
💰 System cost & payback in Taiwan
As a rough planning guide (verify with local quotes — prices move):
| System size | Approx. installed cost | Suits |
|---|---|---|
| 3 kW | ~NT$90,000 – 130,000 | Small home, low usage |
| 5 kW | ~NT$140,000 – 190,000 | Typical family home |
| 10 kW | ~NT$260,000 – 340,000 | Large home / small business |
With high summer tariffs and strong incentives, payback commonly lands around 5–8 years — then 20+ years of cheap power. Work out your own numbers with the ROI calculator and size the array with the panel calculator — or design the whole system at once with the system report builder.
🛠️ Field note
Two practical things from the Taiwanese market: first, mounting design matters more here than almost anywhere — typhoon-rated frames and ballast calculations are non-negotiable, and any quote that skips wind loading should be questioned. Second, size the system against the summer AC bill, not the annual average: in Taiwan the top tariff blocks are hit precisely when the sun is strongest, which is the best possible alignment between production and the expensive units you offset.
🧰 Solar tools for Taiwan
Plan your Taiwan system with these:
- Solar panel calculator — how many panels for your usage and sun hours.
- Solar bill savings calculator — how much you'll cut off the block tariff.
- ROI calculator — payback period in dinars.
- Battery calculator — if you want backup for outages.
- Full system report — design the whole system in one page.
Related reading: how many panels to run a house, grid-tied vs off-grid vs hybrid, and solar panels in hot climates.
❓ Frequently asked questions
Is solar worth it in Taiwan?
Yes — high summer tariffs, strong government incentives and dense rooftops make Taiwan one of Asia's most attractive rooftop markets, with typical payback around 5–8 years.
How many sun hours does Taiwan get?
About 4.2–4.5 PSH on average — highest in the southwest (Kaohsiung ~4.5–4.7), lower in the cloudy northeast (Taipei ~3.8–4.1).
Does Taiwan pay feed-in tariffs for solar?
Taiwan has historically paid strong rooftop FIT rates and still runs incentive programmes toward its national solar target. Current buyback rates change yearly — confirm with Taipower or your installer.
How much does a 5kW system cost in Taiwan?
Roughly NT$140,000–190,000 installed. Typhoon-rated mounting adds a bit of cost but is essential — get local quotes and check the mounting spec.
Note: tariffs, net-billing rules and prices in Taiwan change over time. The figures here are approximate, for planning only — always verify with your utility and local installers.