What Is BIPV?
Building-integrated photovoltaics (BIPV) refers to solar modules that serve a dual function: they generate electricity and simultaneously replace a conventional building element — roof tiles, facade panels, glass skylights, or balustrades. Unlike bolt-on solar panels that sit above a finished roof, BIPV elements are the roof.
This distinction matters for several reasons in Switzerland:
- Heritage and planning rules: Many Swiss communes, particularly in historic town centres or alpine villages, prohibit or restrict conventional solar panels on visible roofs. BIPV products — because they integrate into the building envelope — often qualify for the simplified Meldeverfahren notification procedure even where standard panels require a full Baubewilligung.
- Aesthetic outcomes: Swiss homeowners and architects increasingly specify BIPV for design quality.
- Geneva BIPV premium: Canton Geneva's SIG subsidy programme in 2026 offers a premium grant for BIPV installations, recognising the higher cost versus conventional systems.
BIPV Product Categories
1. Roof-integrated solar tiles and shingles
These replace individual roof tiles. Swiss suppliers including 3S Swiss Solar Solutions and Meyer Burger (BIPV product lines) offer glass-glass modules sized to integrate with standard Swiss tile formats. Efficiency ranges from 17–22%.
2. Roof-integrated flat modules
Larger format panels replace the entire roof covering, sitting flush with the roof plane. These are common on new builds and renovations. Megasol (based in Deitingen) produces flat-format BIPV modules widely used on Swiss residential roofs.
3. Solar facades
Vertical facade cladding panels generate electricity and provide weatherproofing. South-facing facades lose roughly 25–35% of yield versus an optimally tilted roof but gain it back in winter production when solar angles are low. In cities like Zurich and Basel, solar facades on commercial buildings are increasingly common.
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4. Solar glass (BIPV glazing)
Transparent or semi-transparent solar modules can replace standard glass in skylights, atriums, or balustrade glazing. Efficiency is lower (8–14%) but the material cost offset is significant.
Cost Comparison: BIPV vs Standard PV
| System type | Installed cost per kWp | Notes |
|---|---|---|
| Standard rack-mounted | CHF 1,800–2,400 | Lowest upfront cost |
| Roof-integrated flat BIPV | CHF 2,400–3,200 | Offset by saved roofing cost |
| Solar tile / shingle | CHF 3,000–4,200 | Highest integration quality |
| Solar facade | CHF 2,800–4,000 | Depends on facade area and complexity |
The cost premium of BIPV narrows when you account for the roofing materials they replace. A full roof renovation on a Swiss house costs CHF 30,000–80,000; opting for BIPV instead of conventional tiles reduces the incremental solar cost considerably.
Eligibility for EIV with BIPV
BIPV systems are fully eligible for the federal Pronovo Einmalvergütung (EIV), subject to the same conditions as standard systems:
- Components must appear on Pronovo's approved products list
- Minimum 2 kWp
- Grid connection required
Some cantonal Energiefachstellen offer BIPV-specific premium grants on top of the standard cantonal bonus. Ask specifically about BIPV when contacting your cantonal office.
Working with Architects and Planners
BIPV installations almost always involve an architect or building planner, particularly for new builds or renovations requiring planning approval. Key points to clarify early:
- Which BIPV system is dimensionally compatible with the proposed roof design
- Structural implications (BIPV modules may be heavier than standard tiles)
- Waterproofing warranty — BIPV roofs must carry a weather-tight guarantee
- Integration with existing thermal insulation layers
Swiss manufacturers including Meyer Burger and 3S Swiss Solar Solutions have technical advisers who work directly with architects on integration specifications.
BIPV and Heritage Buildings
For listed buildings (Denkmalpflege), standard solar panels are typically refused. BIPV offers a potential route: some cantonal heritage authorities accept low-reflectance, integrated solar elements that closely match the visual character of the original roof. Always engage your cantonal Denkmalpflege authority early in the project to establish what is acceptable before specifying products.
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