In Neuchâtel, 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.
Neuchâtel example: take over an existing installation Consider an owner changing service provider and preparing an expansion. This example does not imply that every Neuchâtel installation needs new equipment. Gather plans, models, serial numbers, warranties and historical data first.
Separate diagnosis, restoration, expansion and new service. Inverter replacement does not automatically mean replacing panels. Have electrical limits, retained functions and adaptations explained. Equal rated power does not establish interchangeability.
Check monitoring access: account holder, owner permissions, retained history and alert transfer. Specify how settings changes are documented. A screen displaying data does not show that all contracts and responsibilities have transferred.
Compare a diagnostic visit with replacement proposed before assessment. Request findings, measurements and compatible options. Obtain the updated plan and warranty contacts at handover. The offer’s value lies in documented system continuity rather than promises to renew every component.