Solar panels in Grenoble in 2026: prices, profitability and grants
Grenoble (38) receives an irradiation of 1450 kWh/m²/year, in climate zone H1. Here is everything you need to know before investing in solar.
1450 kWh
Annual irradiation
kWh/m²/year · PVGIS
3,880 kWh
3 kWp output/year
south-facing · 30°
~556 €
Annual savings
self-consumption ~70%
~12 years
Payback period
3 kWp installation
📍Key points of this local guide
→Local irradiation: 1450 kWh/m²/year, climate zone H1 (North). Cuvette alpine : fort ensoleillement d'altitude au printemps/été, mais attention aux masques montagneux et à la neige hivernale.
→A 3 kWp installation produces around 3,880 kWh/year in Grenoble, which is ~556 €/year saved on your bill.
→Average payback period in Grenoble: ~12 years. The self-consumption bonus has been abolished since June 2026.
→VAT can be 5.5% under 5 cumulative conditions (capacity ≤ 9 kWp, residential building, PPE2-V2 certification, compliant heavy metals content, active EMS, mandatory since January 2026). Without an EMS: 20% VAT. Ask about the Auvergne-Rhône-Alpes regional grants through your ADIL (the departmental housing information agency).
Sunshine in Grenoble
Grenoble is in climate zone H1 (North), with an annual irradiation of 1450 kWh/m²/year according to PVGIS data (European Commission, JRC). Cuvette alpine : fort ensoleillement d'altitude au printemps/été, mais attention aux masques montagneux et à la neige hivernale.
For a 3 kWp installation (6 to 8 panels), that means around 3,880 kWh of solar output per year, with a peak in June-July and a drop in December-January, typical of the zone.
National comparison: your city is marked by the cursor.
ℹPVGIS data: our simulator uses the TMY (Typical Meteorological Year) data from the PVGIS API to generate an hourly production profile over 8,760 hours. The result is far more precise than the flat-rate estimates used by most competing tools.
Price of a solar installation in Grenoble
The cost of a residential photovoltaic installation in Grenoble varies with the capacity, the type of roof and the installer. The prices below are indicative for the 2026 market, with 5.5% VAT subject to conditions (see below) or 20% if a condition is not met.
System size
Gross price incl. VAT
CRE bonus
Net price
Recommended profile
3 kWp · 6-8 panels
6,600 €
Abolished
6,600 €
Household of 2-3 people · ~3,500 kWh/year
6 kWp · 12-14 panels
~11,484 €
−480 €
~11,004 €
Household of 4-5 people · ~6,000 kWh/year
9 kWp · 18-20 panels
~16,236 €
−720 €
~15,516 €
Large household or EV · ~8,500 kWh/year
⚠5.5% VAT, 5 mandatory cumulative conditions: capacity ≤ 9 kWp · residential building (regardless of its age) · PPE2-V2 certification (carbon footprint below 530 kg CO2/kWp, which can be checked on certisolis.com) · compliant heavy metals content · active EMS/SGE mandatory since 1 January 2026 (an energy management system able to control the equipment). If even one condition is missing: 20% VAT on the whole installation. Batteries are always at 20% (legal exclusion). The CRE bonus is paid in a single payment by EDF OA (the feed-in tariff operator) when the Enedis (grid operator) connection is made, and your RGE-certified installer (French quality label) takes care of it.
Profitability in Grenoble: the full calculation
With 3,880 kWh/year produced and about 70% self-consumption (a household at home during the day or appliances scheduled for solar hours), here is how the savings break down for a household in Grenoble:
Self-consumption (~70%)
~543,5 €/year
2,716 kWh × 0,2001 €/kWh
Surplus fed into the grid (~30%)
~12,8 €/year
1,164 kWh × 0,011 €/kWh (surplus buy-back tariff, June 2026 ministerial order (arrêté))
~556 €
estimated annual savings
~12 years
payback period
ℹThese figures assume an average profile: a tariff of 0,2001 €/kWh (1 August 2026), an annual increase of 3% and about 70% self-consumption. Actual profitability varies greatly with the orientation (due south is optimal), the roof tilt, the presence of shading and how much you are at home during the day. A household that is away during the day can see its payback period lengthen by 2 to 4 years compared with the estimates above. These tariff-increase assumptions are reasonable but uncertain; if tariffs stagnate, the payback period lengthens. Our simulator calculates your payback period with your real data (GPS location + consumption profile) →
Grants available in Grenoble (38)
In 2026, residents of Grenoble can benefit from several grants that can be combined:
CRE self-consumption bonus: abolished since 1 June 2026 for all new installations.
5.5% reduced VAT: under 5 cumulative conditions: capacity ≤ 9 kWp, residential building (regardless of its age), PPE2-V2 certification (carbon footprint below 530 kg CO2/kWp), compliant heavy metals content, and active EMS/SGE mandatory since 1 January 2026. If a condition is missing: 20% VAT on the whole installation. Batteries are always at 20%. Check eligibility with your RGE installer.
MaPrimeRénov': does not cover photovoltaic panels that generate electricity. This scheme funds solar thermal (hot water), insulation, heat pumps and renewable heating, not PV.
Auvergne-Rhône-Alpes regional grants: some regions and local authorities offer additional support. Ask your ADIL or the local Espace Info Énergie (energy advice centre).
Dedicated financing: ask your bank about financing offers dedicated to renewable energy.
Aid
Amount (3 kWp)
Condition
Procedure
CRE self-consumption bonus
Abolished
Abolished since 1 June 2026
Through an RGE installer
5.5% VAT
~363 € saved
5 cumulative conditions (including an active EMS)
Check on the quote
MaPrimeRénov'
❌ Not applicable
PV not eligible (solar thermal only)
—
Auvergne-Rhône-Alpes grants
Variable
Depending on the local authority
ADIL / Espace Info Énergie
Frequently asked questions: Grenoble
How much does a solar installation cost in Grenoble ?
In Grenoble, a 3 kWp installation comes to around 6,600 € including VAT (the self-consumption bonus has been abolished since June 2026, so the net cost is the gross cost). For 6 kWp, allow ~11,484 € gross. Prices vary with your roof and the installer: ask for at least 3 quotes from RGE installers.
What payback period can you expect in Grenoble ?
With 1450 kWh/m²/year of sunshine and savings of around 556 €/year on a 3 kWp installation, the payback period is estimated at ~12 years. This payback period depends on your self-consumption rate, the tariff of your electricity contract and the orientation of your roof. Our simulator calculates your exact payback period with the real PVGIS data for Grenoble.
What grants are available in Grenoble in 2026?
The main grants in Grenoble in 2026: VAT (the CRE self-consumption bonus has been abolished since 1 June 2026), 5.5% VAT under 5 mandatory cumulative conditions, including an active EMS/SGE since January 2026 (without an EMS: 20% VAT), and Auvergne-Rhône-Alpes regional grants through the ADIL or the Espace Info Énergie. Note that MaPrimeRénov' does not fund photovoltaic panels, only solar thermal, insulation and heat pumps. Ask your bank about financing offers dedicated to renewable energy.
What capacity should you install in Grenoble ?
The usual rule is to aim for 1 kWp per 1,000 kWh of self-consumed annual consumption. In Grenoble (1450 kWh/m²/year), 3 kWp produces ~3,880 kWh/year, which suits a household of 2-3 people using ~3,500 kWh/year. For a household of 4-5 people (6,000 kWh/year), aim for 6 kWp. Our simulator optimises the capacity for your exact profile.
SourcesPVGIS, European Commission JRC: TMY data 2005-2023 · CRE: Arrêté of 1 June 2026, buy-back tariff 0.011 €/kWh, bonus abolished · Enedis: TURPE grid charges and grid-connection procedures
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