In Bern, 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.
Bern example: clarify documents in different languages Consider a buyer receiving a quote in one language and data sheets or warranties in another. This can occur in several regions and does not describe every Bern contract. Request a version you understand and identify documents included in the agreement.
Match device names, model numbers and accessories across quote, specifications and warranty. Translating a commercial name does not establish the same version. Have available functions explained for the Swiss configuration: monitoring, storage, charging and any backup.
Check service and claim contacts separately. Who responds in the agreed language? Who translates a technical requirement or forwards evidence to the manufacturer? Request stated timing and charges without treating a sales conversation as an unlimited service commitment.
Prepare a shared handover list of devices, tests, access and records. Record differences between options before signing. The owner operating the system must understand the choice; a large file does not establish consistency between versions, responsibilities and terms.