Your roof: Meinier
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.
Specify access, lifting equipment and protection of the work area. Compare mounting and removal arrangements against the condition of the roof covering.
Exposure and access: Meinier
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.
Show chimneys, roof windows and other obstacles on the installation layout. Record amounts, deadlines and revision terms in the offer.
Full cost and grants: Meinier
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.
Define included and excluded work during the technical survey. 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: Meinier
Use the building’s hourly consumption to size the project. 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 Geneva, check Pronovo, the SIG 2026 solar premium and municipal aid before signing. If the timeline is poorly managed, you lose time and sometimes value on helpers.
Measure usable roof area with obstacles and required clearances included. Record who installs, inspects and supports each part of the system in the contract.