Solar for apartment buildings: costs, ZEC and benefits
Apartment buildings offer ideal conditions for photovoltaics: large roof areas, many users and high self-consumption through the ZEC model. This makes them particularly efficient and economical.
Request free quote20–120 kWp
Typical system size
40,000–150,000+
CHF investment
ZEC
Joint usage model
60–75%
Self-consumption rate
How it works
How does a solar installation work in an apartment building?
In an apartment building, solar electricity is produced centrally and then distributed to residents. The most common solution in Switzerland is the local electricity community (ZEC).
With the ZEC:
System calculator
How large should the system be?
The optimal size depends on the building's total electricity consumption. Select the number of apartments to get a first orientation.
ZEV-Rechner
Wie gross sollte die Anlage sein?
Wählen Sie die Anzahl Wohnungen im Gebäude.
Anzahl Wohnungen
8 Wohnungen
Anlagengrösse (kWp)
Empfehlung für 8 Wohnungen
Anlagengrösse
25–40 kWp
Dachfläche
125–240 m²
Investition
50'000–100'000 CHF
Jahresproduktion
22'500–44'000 kWh
Costs
What does a solar installation for an apartment building cost?
The larger the system, the cheaper it becomes per kWp — economies of scale are particularly pronounced for larger buildings.
Billing
How is solar electricity billed in an apartment building?
Produce solar electricity
The PV system on the roof generates electricity during the day for the entire building.
Distribute internally (ZEC)
Electricity is distributed directly to all apartments via the building's internal network.
Bill transparently
Each apartment only pays for the solar electricity actually consumed, via its sub-meter.
Profitability
Why is a solar installation in an apartment building worthwhile?
Higher self-consumption
With many users, solar electricity is consumed evenly throughout the day — ideal for apartment buildings.
Lower costs for all
Solar electricity is cheaper than grid electricity. All tenants benefit directly from lower electricity bills.
Property value rises
Buildings with solar installations are more attractive to tenants and buyers.
Stable energy prices
Independence from electricity price rises protects owners and tenants in the long term.
Capital investment
Is an apartment building with photovoltaics a good investment?
Yes, in many cases. A solar installation can generate additional income, reduce operating costs and increase attractiveness for tenants.
Profitability factors
What factors influence profitability?
Self-consumption
The higher the self-consumption, the better the return. In apartment buildings, a large share is consumed directly.
System size
Larger systems are more efficient and cheaper per kWp — economies of scale.
Consumption patterns
Consistent electricity consumption throughout the day increases the use of solar energy.
ZEC structure
Good organisation and meter infrastructure in the building are decisive.
Calculation example
Example: Solar installation for an apartment building
Thanks to shared consumption, a large proportion of electricity can be used directly within the building.
FAQ
Frequently asked questions about solar installations for apartment buildings
Compare offers and plan your installation optimally
Every building is different and requires an individual solution. Via PVPro you compare multiple offers for free and find the best solution for your building.
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