Your roof: Eschert
For a detached house, check roof condition, shading and electrical capacity before signing. A single owner’s decision still requires a technical roof survey.
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 plans, equipment references and service boundaries before accepting a price. Record who installs, inspects and supports each part of the system in the contract.
Exposure and access: Eschert
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.
Check building protection and appearance requirements with the relevant authority. Confirm the supporting structure, anchor points and mounting design.
Full cost and grants: Eschert
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.
Compare quotation items for the same scope of work and supply. Include maintenance, insurance and foreseeable replacements in lifetime cost.
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: Eschert
Define included and excluded work during the technical survey. Price the necessary electrical distribution board changes and protection devices.
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.
Specify the work assigned to subcontractors and who is responsible for each task. Include the constraints identified during the survey in the quotation.
