What this changes for your decision
Swissolar anticipates around 14% solar electricity in 2025 and 17% in 2026, with the market stabilizing after the 2025 decline. This guide shows the elements to check in the quote and contract.
For your project, the item “big roof” should be explained in terms of the building, consumption, grid connection and contract. Ask for the source, date and, for calculated values, the method used.
For your project: For an industrial or agricultural roof, compare own investment, roof leasing and a supply contract. Check demand, tenants, grid, grants and staged development.
Three checks before signing
1. Feasibility
Check structure, roof condition, fire, access, connection and authorizations before ordering.
2. Perimeter
Distinguish between house, facade, large installation and special surface, because the procedures differ.
3. Decision date
Have rules, aids and technical proofs confirmed just before signing.
References for “Commercial roofs” for your project
- Swissolar, Congress photovoltaïque national 2025: Swissolar anticipates around 14% solar electricity in 2025 and 17% in 2026, with the market stabilizing after the 2025 decline.
- OFEN, promotion of photovoltaic installations: The OFEN describes the single remuneration, the calls for tenders, the 30% or 60% support and the floating market bonus.
Note the date of consultation and the scope of each source. National information does not replace or local rate or technical validation of your project.
Compare quotes on a solid basis
Ask for a reference variant and a conservative variant. Each must separate investment, self-consumption, injection, aid, schedule and responsibilities. You will see if the result holds with a less favorable hypothesis.
For the item “big roof”, the quote should state the data to confirm before work starts, who will check it and how changes will be handled.
Your next step
Prepare utility bill, roof information, existing contracts and comparable quotes. Answer in writing to open questions, then compare net price, annual profit and contractual consequences.