Short answer
When does the solar obligation apply to electricity consumers in Geneva?
A Geneva site consuming more than 0.2 GWh of electricity per year is subject to a PV obligation: suitable roof areas must be equipped by 2030, with solar power primarily used on site. Exemptions require evidence of impossibility or economic disproportionality and must be clarified with OCEN; Arts. 14A LEn and 12N REn provide the legal basis.
Important
As of 14 September 2026, use the body text of Geneva’s obligation page — “above 0.2 GWh” — as the conservative working basis for a site exactly at 0.2 GWh; the page heading also uses “≥ 0.2 GWh”. The dedicated page additionally states 14 days for the OAC worksite notice, while the general OAC page states 30 days. Confirm the threshold and specific procedure directly with OCEN/OAC or in e-démarches before binding planning.
At a glance
Key figures: Geneva solar obligation: 0.2 GWh
| Metric | Value |
|---|---|
| Threshold | Site consumption above 0.2 GWh or 200,000 kWh per year |
| Deadline | Equip suitable roof areas with PV by 2030 |
| Energy use | Solar power should primarily be consumed on site |
| Exemption | Evidence of impossibility to OCEN; replacement measures may apply |
| Procedure note | Obligation page generally states 14 days’ OAC lead time; confirm the deadline for the specific procedure |
Decision points
What determines the right path.
Site consumption determines whether the obligation applies: Geneva’s obligation page states annual consumption above 0.2 GWh, or above 200,000 kWh. The relevant figure is the site’s electricity use, not the planned PV capacity. At exactly 0.2 GWh, the page heading is broader than its body text, so the borderline case should be clarified with OCEN.
The canton sets the deadline: suitable roof areas must be equipped with photovoltaics by 2030. The official page does not name a specific day in 2030. For an existing commercial or industrial site, roof work, grid connection, permits and PV construction must therefore be scheduled around that target.
“Suitable” does not mean every unoccupied roof area. Geneva’s definition excludes areas for technical equipment and safety strips, required access and maintenance routes, mandatory setbacks, permanently and significantly shaded areas, and areas without sufficient load-bearing capacity, watertightness or structural integrity.
Solar power should primarily be used on site. Geneva’s obligation page names electrical or thermal storage and control that links energy demand with production as possible tools. This makes the load profile, load management and intended use more important than simply maximising module area.
An exemption requires evidence: where implementation is demonstrably impossible, an exemption may be requested and replacement measures may be required. The request and supporting documents — for example on technical impossibility or economic disproportionality — should be sent to OCEN by post or email as early as possible, and OCEN decides the case.
Roof geometry affects the permit route. On pitched roofs, the conditions include no more than 20 cm of projection perpendicular to the roof, no projection beyond the roof in plan view, a non-reflective finish and a grouped arrangement. On flat roofs, the system may rise no more than 1 m above the upper roof edge, must not be visible from below at a 45-degree viewing angle and must be non-reflective; deviations make the OAC procedure relevant.
Sequence
How the project stays cleanly managed.
- 1
Document site consumptioncompile electricity bills, load-profile data or internal consumption records for the individual Geneva site and check whether annual use exceeds 0.2 GWh or 200,000 kWh. Do not combine several buildings or metering points into one site without checking the applicable definition.
- 2
Survey the suitable roof areamark technical equipment, safety strips, access, maintenance routes and mandatory setbacks. Add shading, structural-capacity and watertightness checks so that the remaining mandatory area can be traced under Geneva’s official definition.
- 3
Check heritage and installation conditionscompare roof form, visibility, reflectivity and grouping with Geneva’s solar-installation conditions. If the building lies in an ISOS A village zone or has high heritage value, include OAC and, where relevant, the heritage office in the assessment.
- 4
Define the energy and system conceptsize the PV system on the suitable area and establish how much solar power will be used directly. Assess electrical storage, thermal use or control only as project-specific options; Geneva’s obligation page does not prescribe a universal storage size.
- 5
Prepare an exemption or replacement measureif implementation on the suitable area is technically or economically impossible, document the specific reasons, calculations and alternatives. Send the request with complete evidence to OCEN as early as possible and wait for its assessment.
- 6
Coordinate the OAC route and construction startfor this obligation case, Geneva’s dedicated page generally states that an opening-of-worksite notice is filed with OAC 14 days before work begins through e-démarches. The general OAC page states 30 days for worksite notices; because the procedural context differs, confirm the deadline or OAC instruction shown for the specific e-démarches case before work starts.
Checklist
Questions to settle before the quote.
- Check the threshold above 0.2 GWh or 200,000 kWh at the individual site and distinguish “moyens consommateurs” from “grands consommateurs”
- Define suitable roof areas by accounting for access, technical equipment, safety setbacks, shading, load-bearing capacity and roof watertightness
- Classify self-consumption, storage or control as project logic and connect PV sizing with the site’s electricity use
- Keep an OCEN exemption request separate from the OAC notice, permit and deadlines before construction starts
FAQ
More questions: Geneva solar obligation: 0.2 GWh
Sources
Official sources & references.
The responsible authorities are decisive. Always verify binding details – amounts, deadlines and conditions – for your specific property against the current status of the respective authority.
- Solar obligation for medium-sized electricity consumersRepublic and Canton of Geneva, OCEN
- Suitable roof areas for solar panelsRepublic and Canton of Geneva
- Conditions for solar installationsRepublic and Canton of Geneva, OCEN
- Energy Act, Art. 14ASILGENEVE, Canton of Geneva
- Opening a worksite with OACRepublic and Canton of Geneva, OAC