7 places · sun position · panel angle
Solar data for Estonia
Across the 7 places in Estonia the best fixed tilt for solar panels is 44°, and flat ground gets 2.6 to 2.7 peak sun hours a day. Every number is computed for each place.
Solar power in Estonia at a glance
Averages over 7 places with climate data, for a fixed array facing south.
- 2.62–2.64
- 2.64–2.66
- 2.66–2.68
- 2.68–2.70
- 2.70–2.72
Peak sun hours a day on flat ground. Each dot is one place.
The sunniest places in Estonia, with 2.72 peak sun hours a day on flat ground, are Viljandi and one other place; the least sunny is Narva with 2.62. A 1 kWp array at its best angle makes from 1,012 kWh a year in Narva to 1,056 kWh in Viljandi — 1,042 kWh on average.
The best year-round tilt is 44° everywhere. Off-grid systems are sized for the darkest month and do better steeper, at 81° on average: at 70° that month brings 0.42 kWh per kWp a day in Narva and 0.62 kWh in Viljandi.
Size an off-grid system or open any place below for its sun path, monthly table and tilt curve.
Sunniest places in Estonia
Ranked by peak sun hours on flat ground: the yearly average of a day's sunshine energy (NASA POWER climatology). Output: 1 kWp at its best year-round angle.
Solar by region in Estonia
Averages of the places in each region, sunniest first. Darkest month: what 1 kWp of off-grid panels at 70° makes a day in the worst month of the year.
| Region | Places | Sun hours/day | kWh per kWp a year | Best tilt | Darkest month at 70° | Sunniest place |
|---|---|---|---|---|---|---|
| Pärnumaa | 1 | 2.72 | 1,054 | 44° | 0.59 kWh | Pärnu |
| Viljandimaa | 1 | 2.72 | 1,056 | 44° | 0.62 kWh | Viljandi |
| Harjumaa | 2 | 2.71 | 1,053 | 44° | 0.45 kWh | Maardu |
| Tartu | 1 | 2.69 | 1,037 | 44° | 0.60 kWh | Tartu |
| Ida-Virumaa | 2 | 2.64 | 1,021 | 44° | 0.42 kWh | Kohtla-Järve |
Largest places in Estonia at a glance
Daylight and clock time in Estonia
In Maardu (59.5° N), the northernmost place, the longest day of the year lasts 18 h 40 min and the shortest 6 h 02 min; in Viljandi (58.4° N), the southernmost, 18 h 18 min and 6 h 21 min. The clocks change twice a year: forward on Sun 29 Mar, back on Sun 25 Oct (Europe/Tallinn).
| Time zone | Places | UTC offset | Clocks change in 2026 |
|---|---|---|---|
| Europe/Tallinn | 7 | UTC+2, in summer UTC+3 | Forward on Sun 29 Mar, back on Sun 25 Oct |