Onex • Geneva

Solar panels: Onex, Geneva Plan your project 2026

Your solar project: Onex. Specify access, lifting equipment and protection of the work area. Include the constraints identified during the survey in the quotation. Specify the work assigned to subcontractors and who is responsible for each task. Compare mounting and removal arrangements against the condition of the roof covering.

Verify the grid operatorCompare detailed quotesScenario: 8 kWp

Roof potential

To assess

Purchase — calculation hypothesis

CHF 0.260/kWh

Net cost — model

CHF 16'960

Payback — model

11-15 years

The 8 kWp scenario above uses the cantonal model assumptions: indicative output, 40 % self-consumption, hypothetical purchase and export tariffs, installed costs of CHF 2 200 to 2 800/kWp and assumed Pronovo support of CHF 360 to 400/kWp. It is not a local quote. Recalculate using your roof, hourly demand, contracts and confirmed grants; include fees, losses and replacements.

Your roof: Onex

For an apartment building or condominium, clarify roof rights, owner consent and access. Include cable routes, protection and maintenance in the same plan.

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.

Simulate generation and available surplus before choosing a battery. Record amounts, deadlines and revision terms in the offer.

Exposure and access: Onex

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.

Assess shifting compatible loads to solar hours before adding storage. Identify the service contact and stated response times after commissioning.

Full cost and grants: Onex

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.

Specify access, lifting equipment and protection of the work area. Record who installs, inspects and supports each part of the system in the contract.

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: Onex

Reserve space and access for inspections and future replacements. Confirm voltages, currents and module compatibility with the selected inverter.

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.

Show chimneys, roof windows and other obstacles on the installation layout. Confirm the supporting structure, anchor points and mounting design.

Compare installers: Onex

When comparing installers, check the stated production assumptions. Then check a realistic installation timetable for the season. These details matter more than the advertised price alone.

The quality gaps are quickly seen in the annexes: level of technical inspection, self-consumption assumptions, electrical diagram, service after commissioning and clarity of service limits.

Before choosing an installer, ask who attends the site after a fault, the travel charges and stated response time. A registered office address does not establish service availability for your building.

Define included and excluded work during the technical survey. Price the necessary electrical distribution board changes and protection devices.

Places cited on this page — confirm service coverage

Onex

Frequently asked questions: Onex

Prepare these questions about the roof, costs, storage and procedures before comparing offers.

What should I check during the roof survey?

Use the building’s hourly consumption to size the project. Confirm the supporting structure, anchor points and mounting design.

How should I compare self-consumption and exports?

Compare avoided purchase costs and surplus export prices with your hourly demand. Self-consumption reduces purchases when generation is used on site; the choice also depends on full cost and losses.

How should I assess adding a battery?

First compare an option without storage for the same demand. Request plans, equipment references and service boundaries before accepting a price. Check how equipment can be accessed and components replaced without damaging the roof covering.

Which procedures should I confirm for this building?

The procedure depends on the plot, building and integration. Present the plan to the municipality to confirm notification or permit requirements and any protection constraints before ordering.

What should I request from installers?

When comparing installers, check a detailed comparison of each quotation item. Then review the tests and documents planned for handover. These details matter more than the advertised price alone.

Guides to nearby towns

Geneva Lancy Carouge Confignon

Prepare your solar project: Onex

Compare detailed offers, check the construction method and lock in the right order between roofing, quotes and procedures.

Get serious offers Read the quote guide