Your roof: Corgémont
For a roof exposed to snow, ask for justification of design loads and access arrangements. The offer should include a schedule suited to site conditions and explain the consequences of delay.
In all cases, the useful surface area is almost always less than the gross surface area announced. Skylights, chimneys, setbacks, shading and future maintenance needs must be integrated before talking about final power.
Request a technical site survey before relying on a sales estimate. Value surplus using the confirmed export contract, with guarantees of origin accounted for separately.
Exposure and access: Corgémont
Request a survey of nearby shading and the horizon, with monthly generation estimates. Compare options for your building using the same weather data and loss assumptions.
Reserve space and access for inspections and future replacements. Specify fall protection and access for installation and maintenance.
Full cost and grants: Corgémont
The displayed scenario uses an indicative installed cost for 8 kWp. A quote must specify equipment, roofing and electrical work, connection, inspections and fees before deducting confirmed grants.
Programmes depend on the municipality and available funds. Obtain written confirmation of amounts, timing, limits and combined support for your address before including them in the budget.
Request the weather assumptions, losses and monthly results behind the stated output. Distinguish avoided purchase costs from the tariff paid for exported surplus.
Output must be assessed for the actual roof, its orientation, shading and condition. Tariffs depend on the grid, product and contract; a cantonal average does not replace your bill.
Building procedures: Corgémont
Specify the work assigned to subcontractors and who is responsible for each task. Agree on tests, inspections and documents to be provided at handover.
A serious estimate specifies who prepares the announcement, who manages the connection, who follows the administrative back and forth and how any comments are absorbed into the planning.
In the canton of Bern, photovoltaics are supported via Pronovo; building or municipal aid must be verified separately before signature.
Use the building’s hourly consumption to size the project. Keep the simulation assumptions so results can be compared after commissioning.
