Solar Panels in Sion

Are you looking for an installer of solar panels in Sion for a villa, an apartment block or a small commercial building? The capital of Valais, set in the Rhône valley at the foot of the Valère and Tourbillon hills, enjoys a dry, sunny climate, which makes solar energy particularly relevant. This page helps you frame your rooftop solar project in Sion before you ask for quotes.

Photovoltaic or thermal: the usual installations in Sion

Two families of solutions sit side by side. Photovoltaic panels produce electricity, which you either use on site or feed into the grid. Thermal collectors heat domestic hot water, sometimes as a backup to the heating.

Among Sion’s buildings, projects fall mainly into three situations:

• the villa: a well-exposed roof, often a generous available area, and a single decision-maker;
• the rental or co-owned apartment block: a large roof, but several parties to win over and a grid connection to organise;
• the older building: a smaller or more constrained roof, sometimes subject to protection rules.

A reliable installer starts by examining the roof: orientation, pitch, shade cast by a neighbouring building or by the terrain, and the condition of the roof covering. If the covering needs to be redone in the near future, it is better to carry out both jobs together.

Rhône valley sunshine and Sion’s roofs

Sion’s dry, sunny climate is a clear advantage for solar production. Summer heat does deserve some attention, however: a panel’s output also depends on its ventilation, and fitting it too close against the roof is not ideal. Ask the company how it handles this point in its proposal.

Another thing to bear in mind: Sion is surrounded by hills. Depending on the neighbourhood, a hillside or a nearby building can cast shade at certain times of day. The assessment of a roof must therefore take these shadows into account, especially in winter when the sun is lower.

Snow is less an issue for the plain than for higher ground. If your property is on the heights, or if you own a chalet in a side valley or a resort elsewhere in the canton, the weight of snow and its sliding off the roof matter when choosing the fixing and the position of the panels. Mention this in your request.

Old town and protected buildings: solar with conditions

This is the point that sets Sion apart from many other municipalities. The old town and the hill area contain an important built heritage. The federal rule (Art. 18a LAT) provides that in a building zone, a solar installation that is sufficiently well adapted to the roof generally only needs a notification. But this ease does not apply to a cultural heritage building or a protected site: there, a building permit is required, and the municipality examines how the installation fits into the built landscape.

In practical terms, if your building is in the old town or in a protected perimeter:

1. first ask the municipality whether the building is subject to any protection;
2. have the appearance requirements clarified (colour, integration into the roof, visibility from the street);
3. do not order anything before you have the answer, as the position of the panels may change completely.

In more recent apartment-block neighbourhoods and in villa areas, the situation is generally simpler, but only the municipality can confirm this for your plot.

Procedures: notification, permit and approvals to obtain

In Valais, the building permit is issued by the municipality within a building zone, and by a cantonal commission outside it. For a solar installation in a building zone, the procedure is most often limited to the notification, except in the protection cases mentioned above. On energy matters, the cantonal energy and hydropower service is the canton’s point of contact, in particular for the subsidy programme.

A few points to check before signing:

• the grid operator: a photovoltaic installation is connected to the grid, which requires a procedure with the operator;
• co-ownership: the roof is in principle a common part, so the co-owners’ agreement is required;
• the lease: a tenant cannot install anything without the landlord’s written consent;
• second homes: if your chalet or apartment is covered by the federal law on second homes, find out about its possible effects, which depend on the municipality.

An installer can help you put the file together, but responsibility for the procedures remains with the owner. Always check with the municipality of Sion and the competent cantonal service.

Financial support: what to check in Sion

Photovoltaics qualify for a federal one-off payment made via Pronovo. Valais also has a cantonal subsidy programme, and municipal support may exist. The quote should be compared with these subsidies in mind, as they reduce the net cost but their conditions change: ask the company which subsidies it has taken into account, and check the current amounts with the bodies concerned. Some subsidies must be applied for before work begins.

Describing your project and comparing quotes

The more precise your request, the more comparable the quotes. State:

• the type of building (villa, apartment block, commercial premises) and its neighbourhood in Sion;
• the type of roof (tiles, sheet metal, flat roof) and its condition;
• your goal: reduce the electricity bill, produce hot water, or both;
• your usual consumption, if you know it (a single bill is enough);
• any known constraints: building protection, co-ownership, shade, snow at altitude.

A good quote details the planned output, the number and type of panels, the inverter, the fixing, the grid connection, the administrative procedures included and what is excluded. It also states whether scaffolding is included and whether subsidies are deducted.

The cost varies with the size of the installation, the complexity of the roof, site access, any need for reinforcement or roof-covering repair, the choice between photovoltaic and thermal, and any electricity storage. Only a quote can put a figure on it for your building. If your project is ready, you can request a quote: your request is passed on to craftspeople and companies in the region, who will contact you with a free, no-obligation quote.

Going further in Sion and Valais

Find the details of the trade on the solar panels page, an overview of the municipality in work in Sion and the key points for the canton of Valais.

A solar project is often accompanied by other work in the same municipality:

• windows and double glazing in Sion
• heat pump in Sion
• kitchen renovation in Sion