The price of residential photovoltaics in French-speaking Switzerland has stabilised in 2026, after the strong fluctuations of 2022–2023. The ranges we see on our sites today are more predictable, and the gaps between installers are almost always explained by the equipment chosen and the quality of the installation — rarely by anything else.
This article brings together our 2026 field figures from residential installations carried out between Lausanne, Geneva, Fribourg, and the Chablais region, with a breakdown of cost items, applicable grants, and an honest payback calculation.
What does a PV installation really cost in 2026
For a quick reference, here are the ranges we see on residential sites in French-speaking Switzerland in 2026, for roof-mounted tile installations, fully installed, excluding batteries.
4 kWp installation (small flat / small roof): CHF 11,000 to CHF 13,500 gross.
6 kWp installation (compact house): CHF 14,500 to CHF 17,500 gross.
8 kWp installation (standard house): CHF 18,000 to CHF 22,500 gross.
10 kWp installation (standard to large house): CHF 22,000 to CHF 28,000 gross.
15 kWp installation (large house, dual aspect): CHF 32,000 to CHF 39,000 gross.
25 kWp installation (large house, renovated farmhouse, small building): CHF 50,000 to CHF 62,000 gross.
These figures include: technical study, installation plans, panel supply, inverter, mounting structure, DC and AC cabling, installation, connection to the distribution board, Pronovo and grid operator paperwork, commissioning, and basic monitoring. Excludes options: battery, panel-level optimisers, EV charging points, modification of the distribution board on older installations.
Price per kWp and the logic of economies of scale
A photovoltaic installation has a significant fixed-cost component: scaffolding, crew travel, study, Pronovo file, grid connection. This fixed component is almost identical whether you install 4 kWp or 15 kWp. The direct consequence: the price per kWp falls as output increases.
| Installed output | Average price per kWp | Indicative gross total |
|---|---|---|
| 4 kWp | CHF 2,800 – 3,100 | CHF 11,500 |
| 6 kWp | CHF 2,500 – 2,750 | CHF 15,500 |
| 8 kWp | CHF 2,350 – 2,600 | CHF 19,800 |
| 10 kWp | CHF 2,250 – 2,500 | CHF 23,700 |
| 15 kWp | CHF 2,150 – 2,350 | CHF 33,700 |
| 25 kWp | CHF 2,050 – 2,250 | CHF 53,700 |
This is why undersizing an installation, out of caution or a tight initial budget, almost always costs more per kWp in the end. When the roof allows it, targeting full capacity is generally the best long-term calculation.
The cost structure of a 10 kWp installation
To understand what you are buying, here is a typical cost breakdown for a 10 kWp roof-mounted tile installation on a standard house.
| Item | Indicative cost | Share of total |
|---|---|---|
| Solar panels (24–26 modules) | CHF 6,500 – 8,500 | ~32% |
| Inverter (string or hybrid) | CHF 1,800 – 3,500 | ~11% |
| Mounting structure and weatherproofing | CHF 2,200 – 3,200 | ~11% |
| DC/AC cabling, protection, monitoring | CHF 1,500 – 2,500 | ~8% |
| Installation and connections (crew + scaffolding) | CHF 5,500 – 7,500 | ~26% |
| Study, plans, Pronovo file, paperwork | CHF 1,500 – 2,200 | ~7% |
| Commissioning + 1-year monitoring | CHF 800 – 1,500 | ~5% |
The most variable item in terms of quality is the main equipment (panels + inverter). A Tier 1 panel (Sunpower, REC, Meyer Burger, LG) at CHF 220–280 per unit is not the same product as an entry-level panel at CHF 130–160. Over 25–30 years of use, the difference shows in yield, effective warranty coverage, and after-sales service availability.
Roof-mounting, integrated roofing, or metal sheet
The installation method affects price and aesthetics without significantly changing yield.
Roof-mounting: panels fixed above the existing roof covering. The standard method — cheapest, fastest, and providing the best panel ventilation (thus better summer yield). Our default recommendation on a roof in good condition.
Integrated roofing (BIPV): panels replace the covering over the equipped area. Cleaner visual appearance, 20–35% more expensive than roof-mounting. Relevant when the roof needs replacing anyway, or for projects subject to heritage constraints.
Metal sheet or corrugated steel: direct fixing to the metal roof covering, without penetration. Fast and effective, price close to roof-mounting on tiles. Common on renovated agricultural and industrial buildings.
Flat roof with ballasting: inclined structure resting on concrete ballast or hooks. No waterproofing penetration; price per kWp close to tile roof-mounting, sometimes slightly higher depending on ballasting complexity.
Panel brands and their market positioning
The market has polarised: a reliable premium segment, a decent mid-market, and an entry-level to avoid.
Sunpower / Maxeon (USA–Singapore). The absolute reference; 40-year cell warranty, maximum yield (>22%), proven durability. 25–40% more expensive than mid-market. Relevant when every square metre counts.
REC (Norway–Singapore). Excellent quality-price-warranty ratio; the Alpha Pure range is among the best on the market. 25-year warranty. Our most frequent choice for demanding installations.
Meyer Burger (Germany, formerly Switzerland). European manufacturing, high-performance heterojunction technology. Availability sometimes variable, but excellent when available.
Q Cells (Germany–Korea). Solid, reliable mid-market; widely deployed. A good choice for standard installations with no particular constraints.
Trina, Jinko, JA Solar (China, Tier 1). Global volumes, honest quality, 25-year warranty, controlled pricing. The core of the market in 2026.
Hyundai, LG Solar. Solid quality; retreating from the Swiss residential market but still present.
To avoid: panels with no Swiss representation, bought at the lowest price online, with no local warranty. A warranty claim after 8 years becomes impossible.
On the inverter side, reliable references in 2026 are Fronius (Austria), SolarEdge (Israel) with optimisers, Sungrow (China, hybrid), Huawei (subject to market position), and Enphase for microinverters in specific cases.
Grants in 2026 and the effective net cost
The photovoltaic investment benefits from two cumulative grant mechanisms, plus the tax deduction on the net cost.
Pronovo one-time payment. Federal lump-sum payment, guaranteed by law, applicable to any installation up to 150 kWp. In 2026, the formula combines a base component (around CHF 340/kWp) and a component proportional to installed output. On a 10 kWp installation, the payment typically sits between CHF 6,000 and CHF 8,000, paid 6 to 12 months after commissioning. This is the primary grant — automatic, with no income ceiling.
Cantonal and municipal grants. Variable and less systematic than the federal payment. Vaud, Geneva, Fribourg, and Neuchâtel offer supplements under their current programmes. Certain municipalities (Lausanne, Nyon, Morges, Vevey, the City of Geneva) add local grants — which can represent an additional CHF 1,000 to CHF 3,000 depending on location and the installation profile.
Tax deduction. The net cost after the one-time payment is fully deductible from taxable income, as with any energy investment. At a marginal rate of 27% (typical in French-speaking Switzerland for middle-income earners), 27% of the net cost comes back as a tax saving. The deduction is spread over one or two tax years depending on the canton.
A worked example: house in Vaud, 10 kWp roof-mounted installation, gross cost CHF 25,000.
- Pronovo one-time payment: –CHF 7,200
- Municipal grant (depending on location): CHF 0 to –CHF 2,000
- Sub-total after grants: CHF 15,800 to CHF 17,800
- Tax saving (marginal rate 27%): –CHF 4,265 to –CHF 4,806
- Effective net cost: CHF 11,500 to CHF 13,500
That represents total assistance of around 45–55% of the gross cost. This is what makes photovoltaics one of the most difficult investments to beat in terms of return.
An honest payback calculation
For a well-sized and well-oriented 10 kWp installation in French-speaking Switzerland:
Estimated annual production: 9,500 kWh/year (depending on orientation and tilt).
Self-consumption through natural usage: 30–40%, i.e. 3,200 kWh/year.
Saving on the electricity bill: 3,200 × CHF 0.29 = CHF 928/year.
Grid injection income: 6,300 × CHF 0.11 = CHF 693/year (varies by grid operator).
Total annual benefit: CHF 1,620/year.
Against an effective net cost of CHF 12,500, payback is 7–8 years for the self-consumed share, and around 11–12 years including grid injection. Beyond that, the installation generates net income for 15 to 20 years — before any evolution in surplus buy-back conditions.
Adding a battery brings comfort and resilience but slightly reduces the standalone ROI. See our dedicated article on photovoltaic batteries for the detailed calculation.
Hidden costs to anticipate
A few items that are not always included in quotations and that can come as a surprise.
Modifying the distribution board. In houses from the 1970s–1980s, the board may need upgrading to accommodate the PV AC input. Allow CHF 1,500–3,500 if renovation is required.
Tree pruning. Morning shade that went unnoticed before the PV installation can become a real production problem. Initial pruning costs CHF 500–1,500 and preserves 5–15% of output.
Long cable runs from the roof. On large houses with a remote plant room, routing the DC/AC cable may require additional work (chasing, conduit, finishing). Allow CHF 800–2,000 extra.
Inverter replacement at 12–15 years. Often overlooked in the initial payback calculation. CHF 1,500 to CHF 2,500 to provision over the life of the installation.
Additional insurance. Some home insurance policies require an endorsement to cover the PV system. Often included, sometimes CHF 50–150/year.
A quotation that explicitly addresses the distribution board, shading, and compatibility with a possible future battery or EV charging point is generally a serious quotation. One that ignores all of this exposes you to cost overruns or underperformance after installation.
Our advice for 2026
When comparing quotations, do not look at the overall price alone. Compare line by line:
- The exact brand and output of the panels (in Wp per panel).
- The number of modules and area covered.
- The inverter brand and warranty.
- Whether panel-level optimisers are included (useful in cases of partial shading).
- The system warranty (10, 12, or 25 years).
- The estimated annual production for your specific roof.
- The scope of Pronovo and grid operator paperwork.
- Provision for future battery and EV charging expansion.
A quotation CHF 3,000 cheaper than the competition almost always conceals either an entry-level panel, an inverter without optimisers, or installation subcontracted to an external team.
A photovoltaic installation has a 25-to-30-year production horizon. The right quotation is not the cheapest: it is the one that explains everything clearly, and that will still be there in 15 years for maintenance and inverter replacement.