In Geneva, compare contractors using your roof, consumption and project scope. Check authorisations, professional status and written service terms instead of a general ranking.
Check the contractors Request the legal company name, comparable references and the division of work between the main contractor and subcontractors. Check authorisation for the electrical tasks. Swissolar membership and the Solarprofis label are different: verify status and activities in the current directory. Nearby premises guarantee neither competence nor repair response times.
Compare the same project Provide roof details, consumption and required functions. Compare models, layout, monthly generation, included work, exclusions and installed price. A generation forecast is not a contractual guarantee. Specify service costs, warranties and contacts. Request several suitable offers without treating three quotations as a legal requirement.
Define procedures and handover Identify the grid operator for the address and who handles each application. Pronovo provides project-specific procedures and permits third-party representation; check documents and timing. Specify payments, tests, handover records and service in the contract. A supplier name or “all-inclusive” claim cannot allocate every responsibility.
Geneva example: compare a condominium proposal Consider a building whose shared roof could accommodate solar. This example illustrates contractor selection; it does not describe every Geneva building. Prepare a file with the property manager separating assessment, owners’ decision, construction and operation. The contractor needs to understand the building without assuming one co-owner can order alone.
Identify the shared meter, participating apartments and equipment to serve. Ask who prepares the diagram and proposed billing arrangements. A quote for shared areas cannot be compared directly with one also serving apartments. Give candidates the same scope and have alternatives explained.
Ask about coordination with management: meeting documents, access scheduling, occupant communications and support after handover. Check who holds data and responds to billing disputes. Installing panels and administering electricity sharing are separate services to define.
Compare the owners’ information pack, full cost and service agreement. Request a handover example from a comparable shared project. Keep decisions, authorisations and responsibilities alongside plans; calling a project “shared” does not specify each party’s commitments.