SIG Geneva – Eco21
Geneva utility (SIG) programme: bonuses for heat pumps, solar thermal and renewable installations. Solar premium boosted to 25% of the federal amount from 2026.
Overview
SIG Eco21 is the energy efficiency and renewables promotion programme of Geneva's utility (SIG). It tops up federal and cantonal aids with targeted bonuses.
New in 2026: the solar premium rises from 20% to 25% of the federal subsidy for systems under 30 kWc, aid is extended to 30-100 kWc (agricultural, commercial and residential buildings). CHF 12 million envelope over 2026-2029.
Coverage: heat pumps, solar PV, solar thermal, district heating connections, storage batteries (new). Cumulative with the Buildings Programme, Pronovo and other cantonal aids.
Conditions
Building located in the canton of Geneva, installation compliant with SIG technical requirements, application filed before works or commissioning.
Required documents
- Detailed quote
- Installation plan
- Final invoices after works
- Proof of address / ownership
Eligibility
Project types
Eligible profiles
Property types
Covered cantons
Frequently asked questions
What changes at SIG Eco21 in 2026?
The SIG solar premium rises from 20% to 25% of the federal subsidy for systems under 30 kWc. Aid is extended to 30-100 kWc installations (commercial, agricultural and residential buildings). CHF 12 million envelope over 2026-2029. New: battery aid at CHF 130/kWh up to 15 kWh.
Is SIG Eco21 combinable with Pronovo?
Yes. For solar PV in Geneva, you combine: Pronovo one-time remuneration (flat fee + CHF 300-600/kWc) + SIG premium (25% of the Pronovo amount in 2026) + battery aid (CHF 130/kWh). The most generous scheme in French-speaking Switzerland.
Is the GEAK Plus subsidized?
Yes, most cantons subsidize obtaining a GEAK Plus. Amount varies between 500 and 2000 CHF.
Are there subsidies for photovoltaics?
Yes, Pronovo provides a federal one-time payment, some cantons add supplements, and local providers may offer bonuses.
Qu'est-ce que le Programme Bâtiments ?
Le Programme Bâtiments est le principal programme de subventions en Suisse, financé conjointement par la Confédération (taxe CO2) et les cantons. Il couvre l'isolation, le remplacement de chauffage, la ventilation et la rénovation globale. Chaque canton définit ses propres montants et conditions via ce programme harmonisé.
Quelle différence entre aide fédérale et cantonale ?
L'aide fédérale (via le Programme Bâtiments) fournit un montant de base identique dans toute la Suisse. L'aide cantonale complète ce montant avec un supplément qui varie selon les cantons. Certains cantons comme Genève ou Berne offrent des montants cantonaux très généreux, tandis que d'autres restent proches du minimum fédéral.