Solar power system as an investment
Nowadays, having a photovoltaic system on your own roof is much more than just an ecological statement. It permanently reduces electricity costs, increases independence from energy suppliers, and significantly increases the value of a property. At the same time, the technology is so advanced that solar systems can operate reliably for decades. Nevertheless, many questions arise before investing: How expensive is a solar system really? How much power do I need? Is a battery storage system worthwhile? And what subsidies are currently available in Switzerland? This guide provides you with a realistic, practical overview of costs, influencing factors, system variants, and subsidy options—so you can make an informed decision and get the most out of your solar system in the long term.
How much does a photovoltaic system cost in Switzerland?
Die Investitionskosten einer Solaranlage hängen primär von ihrer Gr össe, dem gewählten System (mit oder ohne Speicher) sowie den baulichen Gegebenheiten ab. In der Schweiz bewegen sich moderne PV-Anlagen heute in gut kalkulierbaren Preisbereichen – insbesondere bei Einfamilienhäusern.
Als Faustregel gilt: Je grösser die Anlage, desto günstiger wird der Preis pro installierter Leistungseinheit. Kleine Systeme sind relativ teurer, grosse Anlagen profitieren von Skaleneffekten.
Costs per kWp – quick overview
The output of a solar system is specified in kilowatt peak (kWp). This value describes the maximum output under optimal conditions. The following guidelines apply to typical residential buildings (including modules, inverters, installation, and commissioning):
- 5 kWp ( approx. 25–30 m² roof area): approx. $8,000–$11,000
- 7 kWp ( approx. 35–40 m² roof area): approx. $10,000–$15,000
- 10 kWp ( approx. 50–60 m² roof area): approx. $15,000–$25,000
These prices usually include:
- Solar modules and substructure
- inverter
- DC and AC cabling
- Installation including safety measures (scaffolding)
- Grid connection & commissioning
- Administrative notifications (network operators, funding agencies)
In short: these are mostly turnkey complete systems.
System variants and their price differences
Not all solar systems are constructed in the same way. Depending on the objective (cost savings vs. self-sufficiency), roof type, and usage, the construction and investment costs vary significantly.
Photovoltaic system without battery storage
The classic variant: The electricity produced is consumed directly in the home, with surplus energy fed into the grid. This solution is technically simple, cost-efficient, and economically viable for many households.
Price range:
approx. $1,650–$2,300 per kWp
Examples:
- 5 kWp: approx. $8,000–11,000
- 10 kWp: approx. $15,000–$25,000
Ideal for households with moderate electricity consumption and without an electric car or heat pump.
Photovoltaic system with battery storage
An electricity storage system significantly increases self-consumption, as surplus solar power can be temporarily stored and used in the evening or at night. This increases independence from the grid, but also increases investment costs.
Additional costs for storage:
- 5 kWh storage: approx. $5,000–$7,000
- 10 kWh storage: approx. $10,000–13,000
Complete system (10 kWp + 10 kWh storage):
approx. $23,000–$32,000
A storage system is particularly worthwhile for:
- high internal consumption
- Heat pump or electric car
- rising electricity prices
- Desire for greater self-sufficiency
Roof-mounted or in-roof system?
Roof-mounted systems are installed on top of the existing roof covering. They are more affordable, technically proven, and flexible.
Integrated roof systems completely replace roof tiles. They have a more uniform appearance and are often used in new buildings, but are significantly more expensive.
Price difference:
Integrated systems are usually 15–25% more expensive than rooftop systems.
Flat roof vs. pitched roof
On flat roofs, modules are mounted on supports and ballasted, which incurs additional material and installation costs. Pitched roofs are generally easier to equip.
Additional costs for flat roofs:
approx. 20–40% compared to pitched roofs
Solar systems are considered to be very low-maintenance. Nevertheless, you should realistically budget for low running costs.
Insurance & additional coverage:
$80–200 per year ( hail, storm, loss of income)
Maintenance & visual inspection:
$100–200 per year (recommended every 1–2 years)
Inverter replacement:
after approx. 10–15 years
Cost: $2,000–$3,500
Monitoring & service options:
150–250 CHF per year
Total additional costs:
- Without reserves: approx. 200–350 CHF/year
- with reserves: approx. 300–600 CHF/year
Running costs and service life
What factors influence the price of a solar power system?
Several structural and technical aspects determine the effort involved and thus the costs:
- Roof condition & age: old roofs may need to be renovated
- Orientation & inclination: South is optimal, east/west is also very efficient today
- Shading: Trees , chimneys, or neighboring buildings reduce yield.
- Module quality: Standard vs. glass-glass or premium modules
- Cable lengths & technical room: long distances increase material and labor costs
- Accessibility & safety: steep roofs, scaffolding, difficult access routes
- Regional differences: Cities are usually more expensive than rural areas
Services related to the planning, construction, and operation of a solar power system
Individual solar consultation and suitability assessment
The first step is to thoroughly assess whether and how well your building is suited to photovoltaics. This involves analyzing the roof orientation, potential shading, structural conditions, and the expected electricity yield. Based on this, it is possible to estimate the appropriate size of the system and the investment you can expect to make—an important basis for decision-making before the quotation phase.
Technical planning and implementation project
The system is planned in detail during the project planning phase. This includes the exact positioning of the modules, the selection of the inverter, the routing of the cables, and electrical and static clarifications. In the case of older buildings or larger systems, an additional check is carried out to ensure that the roof can permanently bear the load. Careful planning reduces the need for subsequent adjustments and unnecessary additional costs.
Installation, grid connection, and commissioning
Once the planning is complete, it's time for professional implementation. The installation team installs the substructure, attaches the modules, lays the cables, and connects the inverter. The system is then tested, connected to the power grid, and officially commissioned. You will usually also receive an introduction to monitoring the system.
Power storage and smart energy management
If battery storage is planned, it is integrated into the overall system and optimally coordinated with the installation. Supplementary energy management solutions control self-consumption in a targeted manner by giving priority to solar power when it is available. This can be particularly attractive from an economic perspective in the case of variable electricity tariffs or high self-consumption.
Roof renovation or structuraladjustments
For older roofs or those in need of renovation, it may be advisable to carry out repair work before installing the solar system. In some cases, structural reinforcements may also be necessary, especially for large systems. These measures ensure that the roof can safely bear the additional load in the long term.
Integration into smart home and consumption systems
Modern photovoltaic systems can be integrated into existing or new smart home solutions. For example, heat pumps, charging stations for electric cars, or household appliances can be specifically powered by solar power. This increases self-consumption and makes energy use in the household significantly more efficient.
Subsidies and remuneration in Switzerland
Solar energy systems are actively promoted in Switzerland:
- One-time payment (Pronovo / KLEIV)
- Additional cantonal and municipal contributions
- Feed-in tariff for surplus electricity
- Tax deductions (investment costs)
The amount varies depending on location, plant size, and system. An individual subsidy check is almost always worthwhile.
Conclusion: Solar power systems – long-term savings with a predictable investment
Photovoltaics is now one of the most sustainable and economically viable investments for homeowners in Switzerland. The technology is mature, the costs are transparent, and the subsidies are attractive.
Whether you opt for a simple PV system or a complete system with storage, if you match your roof, consumption, and budget correctly, you will benefit from low energy costs and greater independence for decades to come. Careful planning by experienced specialists is crucial, as it determines the yield, service life, and cost-effectiveness of the system.
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