☀️ Peak sun hours in Finland by region
Peak sun hours (PSH) is the number of hours per day the sun delivers 1000 W/m². Finland averages only about 2.6–3.0 PSH annually — among the lowest in Europe. But the story is seasonal: in June the sun is up 19–20 hours a day in the south (even more in Lapland's midnight sun), so summer production is excellent. Winter output is near zero, which is exactly why Finnish systems are sized for the summer half of the year. See our guide on peak sun hours by location.
| Region | Approx. peak sun hours (annual avg) |
|---|---|
| Helsinki & the south | ~2.9 – 3.0 |
| Tampere & the lake region | ~2.8 – 2.9 |
| Turku & the southwest coast | ~2.9 |
| Oulu & Lapland | ~2.5 – 2.7 |
Use the exact figure for your area in the solar panel calculator and the energy production calculator.
⚡ Electricity price in Finland (Nord Pool)
Finland runs on the Nord Pool spot market: household electricity is typically a low fixed supplier fee plus the hourly spot price, which swings wildly — from negative prices in windy summer nights to spikes above ₵0.50/kWh in cold winter peaks. After the 2022 energy crisis, prices averaged higher than any time in the previous decade. Several suppliers offset exported energy against consumption within the billing year, and the state allows an income-tax deduction for household improvement investments including PV. Estimate your saving with the solar bill savings calculator.
💡 Why Finns are buying solar despite the winter
Three reasons: first, summer production is genuinely strong — a 5 kW system can generate ~3,500–4,200 kWh in a Finnish year, roughly half of a typical home's use. Second, retail prices are high and volatile, so self-generated power is a hedge. Third, systems are small and cheap to install, so payback lands around 7–12 years — comfortably inside a 25+ year panel life. Read our guide on panels in cool climates — cold actually helps panel efficiency.
💰 System cost & payback in Finland
As a rough planning guide (verify with local quotes — prices move):
| System size | Approx. installed cost | Suits |
|---|---|---|
| 3 kW | ~€4,000 – 6,000 | Small home, low usage |
| 5 kW | ~€6,000 – 9,000 | Typical family home |
| 10 kW | ~€11,000 – 15,000 | Large home / small business |
With spot-market prices averaging high and simple installations, payback is commonly 7–12 years — faster in years of high prices, and the income-tax deduction improves it further. 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
The Finnish pattern is worth remembering for any high-latitude market: don't size the system for the annual average — size it for the summer half-year, because that is when it actually produces. And pair it with whatever heats the home in winter (heat pump, district heating): the solar offsets the summer electric loads — sauna, water heating, cooling — while the winter bill belongs to other systems. In a volatile spot market, solar is also insurance: your production is worth most precisely in the expensive summer-evening hours.
🧰 Solar tools for Finland
Plan your Finland 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
Does solar even work in Finland?
Yes — Finland is one of Europe's fastest-growing solar markets. A 5 kW system produces ~3,500–4,200 kWh/year, roughly half of a typical home's consumption, and pays back in 7–12 years.
What are the sun hours in Finland?
Only ~2.6–3.0 PSH annually — but June days are 19–20 hours long, so summer production is excellent. Winter output is near zero, so systems are sized for the summer half-year.
How does net metering work in Finland?
There is no classic 1:1 national net metering, but many suppliers offset exported energy against consumption within the billing year, and export is bought at market rates. The state also allows an income-tax deduction for PV as a household improvement.
How much does a 5kW system cost in Finland?
Roughly €6,000–9,000 installed — relatively cheap because systems are small and simple. Get local quotes and check the current tax deduction rules.
Note: tariffs, net-billing rules and prices in Finland change over time. The figures here are approximate, for planning only — always verify with your utility and local installers.