Plug-in solar in Berlin: yield and saving in 2026
900 Wp hanging upright on a south-facing balcony produce about 680 kWh a year in Berlin and save €139 for a household using 2,000 kWh.
Checked by Radif Partners · Editorial policy · How we calculate
Saving per year
€155
680 kWh of solar power, 63 % of it used at home
| Generation per year | 680 kWh |
|---|---|
| of which used at home | 429 kWh · 63 % |
| into the grid, unpaid | 251 kWh |
| clipped by the inverter (800 VA) | 1 kWh |
| Saving on the electricity bill | €155 |
| Payback | 2.9 years |
| Saving over 20 years | €3,104 |
Step-by-step calculation
- Postcode 10178 (area of Berlin): 1,048 kWh per kWp at 35° south according to PVGIS for the centre of the postcode.
- Tilt 90° and the chosen direction: 757 kWh per kWp. Times 0.90 kWp: 681 kWh before the inverter.
- Quarter-hour by quarter-hour against 74 metered households using 2,500 kWh a year: the household uses 63 % of the output itself.
- 429 kWh × 36.2 ct = €155 a year; €450 purchase price ÷ saving = payback.
Estimate based on average weather 2005 to 2023 (PVGIS) and metered household loads. A single year can differ by a few per cent. How we calculate
Berlin sits mid-table among Germany's big cities for solar yield: PVGIS gives 1,048 kWh per kilowatt peak at 35 degrees south for postcode 10178, rank 8 of the 15 cities compared here. A plug-in system (Balkonkraftwerk) with two 450 Wp panels hanging upright on a south-facing railing therefore produces about 680 kWh a year; facing west it is 468 kWh, facing east 481 kWh. A two-person household using 2,000 kWh uses 57 % of the south-balcony output itself and saves €139 a year at 36.2 cents per kWh. The federal Market Master Data Register lists 27,237 plug-in devices in operation in Berlin, 7.4 per 1,000 residents, well below the national 18.3: in a city of renters, uptake depends less on the sun than on landlords and balconies.
What the Berlin data show
| Indicator | Berlin | Source |
|---|---|---|
| Yield per kWp, 35° south | 1,048 kWh | PVGIS, postcode 10178 |
| Rank among 15 big cities | 8 | PVGIS |
| Share November to February | 14.7 % | PVGIS monthly values |
| Plug-in devices in operation | 27,237 | Market Master Data Register |
| per 1,000 residents | 7.4 (Germany 18.3) | MaStR, Destatis |
| Solar systems on buildings | 37,500 | Market Master Data Register |
| of which mainly facing south | 37 % | Market Master Data Register |
The Berlin balcony: often west, nearly always a railing
Berlin's 19th-century tenements and prefab estates put their balconies where the street runs, not where the sun is. If yours faces the courtyard to the west, you lose a good fifth of the yield compared with a south balcony but gain afternoon power. Roofs look different: of the 37,500 building-mounted systems registered in the city, 37 % face mainly south and 13 % are east-west systems. On a balcony the flat decides, on a roof the planner.
Tilted at 35 degrees, the same panels on a south balcony would give 941 instead of 680 kWh. That is rarely allowed on a railing, and the extra comes mostly at summer middays, when a small household exports anyway. For most Berlin flats, hanging the panels upright remains the sensible choice.
Why Berlin has fewer devices than the country
At 7.4 devices per 1,000 residents, Berlin is well below the German average. The weather is not the reason: yield per kWp is as high as in many rural districts with far more devices. Housing is. Almost everyone in Berlin rents, many buildings belong to large landlords, and until October 2024 a landlord could refuse without giving reasons. Since the new section 554 Civil Code, they must allow it unless it is unreasonable for them; with that right behind you, asking is worth it.
Newcomers register the device within one month in the Market Master Data Register; the figures on this page come from that very public list. Nobody has to order a meter change themselves.
A worked example from Mitte
A flat in Berlin-Mitte, two people, 2,000 kWh a year, a south-facing balcony on the third floor with no trees in front. The device costs €450. It produces 680 kWh, of which the household uses 385 kWh itself; the rest flows into the grid unpaid. At 36.2 cents per kWh it pays for itself after 3.2 years. With a 1.5 kWh battery, self-used power would rise to 601 kWh; whether that pays is shown by the battery comparison.