Regional service
Flat-Roof Photovoltaics Aargau – Loads, Roof Protection and Mounting
Flat roofs in Canton Aargau offer large PV potential – provided mounting angles, wind loads and maintenance access are aligned before installation. Exactly this planning step decides yield, roof protection and later maintenance.
Clarify before quoting
In Aargau, industrial and logistics buildings along major transport routes offer large-area flat roofs optimally suited for PV. From 2026 AEW pays around 8.2 Rp./kWh including HKN or the BFE reference market price without HKN; at cantonal level only facade PV is funded (integrated facade CHF 400/kWp, mounted facade CHF 200/kWp, from 75 degrees), not battery storage. With over 520 MW of installed PV capacity, Aargau is among the leading solar cantons. PSI and PARK INNOVAARE create an environment that drives technological innovation in flat-roof planning.
Flat-roof photovoltaics in Aargau requires technically coordinated planning: wind load verification per SIA 261, roof membrane protection and SUVA-compliant fall protection are fixed components of every Vigorek project. The choice between east-west and south orientation is calculated individually based on available roof area, self-consumption profile and ballast requirements.
Prefer to contact us directly? Send your property address, annual electricity consumption (if known) and preferred timing. Roof photos or existing plans help with the initial assessment.
Project profile
Location
Aargau
Service focus
Flat-Roof Photovoltaics
Regional fit
Aargau
Context
How this service works in Aargau in practice.
Aargau comes with its own framework conditions – from incentives and tax treatment to technical requirements. From those, a cleanly managed project flow for your property takes shape.
Service focus
What matters most for flat roofs
Flat-roof PV demands more than module rows on paper: wind load verification per SIA 261, roof membrane protection and SUVA-compliant fall protection are part of every Vigorek project scope. For multi-family buildings, commercial properties and industrial halls in Switzerland.
- Mounting concept based on wind zone, snow load and roof-edge clearance – ballasted or penetrating, with a traceable wind load verification per SIA 261.
- East-west or south layout matched to available roof area, self-consumption profile and ballast requirements – with realistic yield ranges rather than averages.
- Protection concept for the roof membrane (separation fleece), maintenance walkways (min. 20 cm foot clearance) and SUVA-compliant fall protection with guardrails from 1 m height.
- Structurally coordinated planning: PV dead loads, snow and wind loads per SIA 261, and existing roof structures – verified as a requirement, not an option.
Regional framework
Why this canton shifts the priorities
The federal register lists 26,308 photovoltaic systems with 762 MW in Aargau, 4,333 of them added since January 2025 (as of 14 Sep 2026). More than 90 grid operators serve the canton; AEW is responsible in 74 of the 196 municipalities. New buildings over 300 m² need a solar system covering at least 20% of the building area; single-family homes are exempt.
- In Canton Aargau, load distribution, wind uplift and roof-skin protection must be resolved before ordering materials.
- Flat roofs require a different mounting concept than pitched roofs – standard solutions often lead to change orders.
- Maintenance paths and accessibility determine the long-term operating costs of the system.
Project logic
How structure and roof membrane are planned together
The order records these steps, responsibilities and required documents. Outstanding assessments belong in the schedule before work begins.
- Roof inspection assessing statics, roof skin and existing installations.
- Mounting geometry aligned with wind zone, tilt angle and usage concept.
- Protection concept for roof skin, walkways and future maintenance access.
Regional context
Flat-Roof Photovoltaics in Aargau: what matters here
In Canton Aargau, cantonal rules, the responsible grid operator and local permit procedures shape how a project is planned and delivered. The points below show what really matters before quoting, installation and handover.
- Regional starting point
- In Canton Aargau, incentives, grid operators and permit procedures change the priorities for this service.
- Service core
- Flat-roof PV is not a standard grid: wind load, ballast, roof membrane protection, walkways and later access define the design.
- Grid & registration
- For Canton Aargau, grid operators such as AEW Energie AG, metering concept and commissioning are aligned early.
- Decision reason
- In Canton Aargau, load distribution, wind uplift and roof-skin protection must be resolved before ordering materials.
- Execution
- Roof inspection assessing statics, roof skin and existing installations.
- Economic frame
- Feed-in tariff and self-consumption are matched to the property; in the canton, 8.2 Rp./kWh (AEW) is one relevant reference point.
Cantonal framework
Which cantonal framework shapes the project in Aargau.
The technical service stays the same, but the project frame changes with the canton. That is exactly where incentives, tax treatment and MuKEn requirements become strategically relevant.
Local context
Aargau sets the economic pace for this service.
AEW is the grid operator in 74 of the 196 municipalities in Aargau; a self-consumed kWh is worth 16.9 to 33.3 ct in 2027 depending on the utility (ElCom).
Tax and subsidy logic
In Aargau, PV systems can be fully deducted from taxes as value-maintaining and energy-saving investments. The canton allows distribution over several tax periods when taxable income is exceeded. No separate cantonal PV grant. Investment funding comes from Pronovo (mounted under 30 kW CHF 360/kW, integrated CHF 400/kW). The 2026 energy programme only grants a bonus on subsidised roof or facade insulation (buildings permitted before 2000): plus CHF 30/m² for a pitched-roof rooftop system, plus CHF 100/m² for in-roof or facade systems, plus CHF 20/m² on a green flat roof; PV coverage at least 70% or 50%, application before construction.
Permits and energy law
Notification procedure for sufficiently adapted systems on roofs and facades: solar form to the municipal council, start of work if no objection is raised within 30 days. A building permit is required in old town, core, village and hamlet zones, for cantonal heritage properties and their surroundings and in protected townscapes. Aargau relies on individual responsibility, flanked by MuKEn 2014 requirements for new buildings. The revised Energy Act (EnergieG AG) requires self-generation for new buildings and restricts fossil heating upon replacement.
Market signal and location
The federal register lists 26,308 photovoltaic systems with 762 MW in Aargau, 4,333 of them added since January 2025 (as of 14 Sep 2026). More than 90 grid operators serve the canton; AEW is responsible in 74 of the 196 municipalities. New buildings over 300 m² need a solar system covering at least 20% of the building area; single-family homes are exempt. There is no separate cantonal PV grant, only the bonus on subsidised roof or facade insulation (CHF 20–100/m² with a PV system installed at the same time). The system itself is funded by the federal Pronovo one-time payment.
Notification period
30 days to start without objection
Further reading
Service and location details
Whether you want to go deeper into the service, explore the location context or compare projects in nearby regions – here is where you continue.
Service
Flat-roof PV – service overview
Mounting, roof protection and project logic for flat roofs at a glance.
Location
Canton Aargau – overview
Regional incentives, grid operators and framework conditions in Canton Aargau.
Service
PV installation
The right entry point for general mounting questions.
Hub
Location overview
More regions and locations at a glance.
Guide
PV permitting in Aargau
Notification under §49a BauV, design rules and exceptions for protected objects.
Guide
Pronovo one-time incentive in Aargau
Applying for the one-time incentive alongside self-consumption and tax deduction.
Guide
PV funding for roof renovation in Aargau
+CHF 20/30/100 per m² by roof type, 50%/70% area quota and application before construction under Aargau’s 2026 programme.
Guide
Self-consumption & ZEV in Aargau
How a self-consumption community raises the economics of the system.
Guide
PV grid connection in Aargau
Classify TAG, installation notice, SiNa and commissioning in the AEW area and with other grid operators.
Nearby regions
The same service in other regions
Vigorek delivers this service in neighbouring cantons and municipalities too. Depending on location, subsidies and conditions can vary – a comparison is worthwhile.