Your roof: Guin
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. Compare mounting and removal arrangements against the condition of the roof covering.
Exposure and access: Guin
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. Record amounts, deadlines and revision terms in the offer.
Full cost and grants: Guin
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. Confirm voltages, currents and module compatibility with the selected inverter.
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: Guin
Define included and excluded work during the technical survey. Identify the service contact and stated response times after commissioning.
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 Fribourg, photovoltaics go through Pronovo; cantonal aid mainly concerns solar thermal, renovation or the Buildings Program. Verify any local support before including it in the budget.
Specify the work assigned to subcontractors and who is responsible for each task. Record who installs, inspects and supports each part of the system in the contract.
