COMPLETE PV SYSTEMS · OPTIONAL STORAGE
Solar systems in Kölliken – Your regional partner
For roofs in Kölliken, we combine PV installation, electrical work and commissioning into one aligned process instead of disconnected trades.
Kölliken, Aargau
Official figures · Kölliken
Solar in Kölliken: installed base, potential and electricity price 2027
All figures apply to the municipality of Kölliken and come from federal datasets — with source and date below.
- Solar systems in the federal register
- 211
- 5.7 MW capacity, 40 since January 2025
- Solar capacity per resident
- 1,119 W
- Rank 102 of 196 in the Canton of Aargau
- Roof potential per year
- 41.5 GWh
- 53.9 GWh including façades
- Electricity price 2027 per kWh
- 26.48 ct
- EWK Energie AG
Self-consumption
What a self-consumed kWh is worth in Kölliken
On the standard tariff of EWK Energie AG, a purchased kWh costs 24.33 ct in 2027 excluding fixed and metering fees. That is roughly what every kWh of solar power saves when it is used in the house instead of being exported. The total price is 0.13 ct above last year (26.35 ct).
Exported power is paid at the quarterly reference market price; since 2026, systems below 30 kW are guaranteed a minimum of 6 ct/kWh. In Kölliken, self-consumed power is therefore worth up to 4.1 times as much as exported power — which is why the share of solar power used in the house matters most.
Winter power
How much solar power Kölliken delivers in winter
Suitable roofs in Kölliken could produce 41.5 GWh of solar power per year, 25% of it between October and March. Adding façades raises the potential to 53.9 GWh and the winter share to 27%: vertical surfaces make better use of the low winter sun.
For a house with a heat pump, this winter share is what matters: demand is highest in winter and self-consumption is most valuable. Whether a flatter or steeper layout pays off on your roof only becomes clear in the site assessment.
Uptake
How far Kölliken has come with solar
The federal plant register lists 211 photovoltaic systems in Kölliken with a combined 5.7 MW. Since January 2025, 40 systems with 614 kW have been added. The register covers all systems above 30 kVA, subsidised systems and voluntarily registered small systems; new systems often appear with a delay. Per resident that is 1,119 watts — rank 102 of 196 municipalities in the Canton of Aargau.
Electricity prices: ElCom, category H4 (household, 4,500 kWh per year), standard product, 2027. Sources: SFOE, solar potential of Kölliken (PDF) · ElCom, electricity prices Kölliken · SFOE, electricity production plants (as of 2026-09-14) · Energy Ordinance, Art. 12
Figures with sources
Solar in Kölliken: cost, size, storage.
Three questions decide almost every project before a roof is ever measured. Here they are with source and date, so it stays clear what each figure rests on.
Costs
What a system costs
Example: 5–10 kWp rooftop PV: CHF 13,500–27,000. Incl. 8.1% VAT, before incentives and tax deductions, without a battery. Calculated from the SFOE median of CHF 2,497/kWp: the range reflects different system sizes. A market comparison, not a quote.
Roof renovation, structural reinforcement and replacement of the meter cabinet are not included. Roof access, electrical work and planning can change the price. Your specific quote follows the property assessment.
Costs with calculation and sourcesSizing
Single-family home: the realistic size
A typical household using around 4,000 kWh per year needs roughly 25 m² of module area (Swissolar, February 2024). As a starting figure, global irradiation in Canton Aargau is around 1160 kWh/m² per year. Whether that works on your roof in Kölliken depends on orientation, pitch and shading — not on the floor plan.
Two federal bonuses explicitly do not apply to a single-family home: the winter electricity bonus requires at least 100 kW, and the tilt bonus at least 75 degrees of pitch. Neither applies to an ordinary pitched roof. Counting on them makes the business case look better than it is.
Clarify notification and permission before installationStorage
Battery storage and self-consumption
Battery storage earns its money through self-consumption: it shifts solar power from midday into the evening. With EWK Energie AG, every kWh shifted this way is worth 24.33 ct instead of a feed-in payment of at least 6 ct — up to CHF 183 per 1,000 kWh a year. Whether that covers the battery over its lifetime depends on your evening consumption.
Since 1 January 2025, an association for self-consumption (ZEV) may also use the existing connection lines. This makes apartment buildings and neighbourhood setups considerably cheaper, as no dedicated line is required. In Kölliken, the connection conditions are set by EWK Energie AG.
When battery storage makes sense
Services
What we offer.
PV system, heat pump, storage, wallbox and monitoring from one team. Every service is planned as part of a working energy system.
01 · Roof & facade
Plan and install PV systems cleanly.
We review roof, structure, shading, cable routing, inverter and grid connection. Then we create a technically reliable quote.
Roof review · Electrical coordination · Commissioning
01 / 05
Process
Understand first, then promise.
From first contact to commissioning, every system follows a clear process. We clarify roof, electrical work, incentives and expansion path completely. Only then do you receive a reliable quote. No site chaos, no wishful math.
- 01About 2 minutes
Initial estimate
Your key details are enough for a first, honest orientation — no appointment, no obligation.
- 02Response within 24–48 h
3D survey & technical review
We measure the roof by drone and clarify electrical work, regulations and the grid operator.
- 03A few days after the survey
Transparent quote
You see every line item individually, realistic ranges and sensible options such as storage or a wallbox.
- 04After permit and grid-operator approval
Planning, installation & commissioning
We coordinate execution, registration, acceptance and documentation until your system is reliably connected to the grid.
Swiss facts
Applies to residential and commercial properties.
- One-time remuneration
- Federal support depends on system type and size band. Vigorek clarifies which remuneration rate applies to your property and how it interacts with canton and grid operator.
- Storage as a system decision
- A battery only pays off when it fits your consumption and home technology. We assess it as part of the overall plan — not as a late upsell.
- Realistic payback
- We calculate with ranges instead of wishful numbers: self-consumption, remuneration and tariff logic together give a realistic picture of your economic return.
Economics
What does your solar system save?
We map self-consumption, feed-in tariff and payback for your property — so you see early what the system realistically returns.
Proof
How sound planning becomes visible.
Our quotes are not built from flat packages, but from checked data, technical pre-assessment and clearly itemized positions.
Planning basis
Official data as the first cross-check
Roof potential, irradiation and addresses are checked against GeoAdmin and BFE Sonnendach: the same datasets used by federal and cantonal bodies.
Property review
Final quote based on verified data
The initial estimate gives realistic orientation. For the final quote, we capture roof areas, access and technical conditions through a 3D survey (drone) and on-site review — precise, not based on satellite assumptions.
Electrical
Coordination by licensed professionals
From electrical planning through protection equipment to grid registration: all safety-critical steps are carried out by licensed electrical professionals, in-house or through vetted partners.
Quote
Itemized instead of a flat package
Every line item is shown individually instead of hidden in a flat package — so variants and ranges stay traceable from the start.
Execution standard
- Fall protection
- Waterproofing
- Electrical installation to standard
- Documentation
Regional clarification
Not every system follows the same logic in Kölliken.
In Switzerland, permits, grid operator, metering concept and incentive path always depend on the property, municipality and canton. These are exactly the points clarified early before a quote becomes binding.
That avoids a generic promise and creates a well-founded assessment that fits the region and the building.
Components by
The Founders
Engineering depth. Financial structure.
You know before signing who calculates your project and who builds it. Behind that are two founders with two areas of expertise — engineering and finance — and the conviction that a solar system only works long-term when both fit together from the start.
Christian Freiberger
CFA · former KPMG Senior Manager
Co-Founder · Strategy & Finance
Independent management consultant since 2015, previously Senior Manager at KPMG. Most recently Interim Treasury Manager at an energy storage manufacturer. Christian brings the financial structure: liquidity planning, transparent calculations and no project whose numbers don’t add up.
Marc Hammerschmidt
B.Eng. Mechanical Engineering
Co-Founder · Engineering & Planning
Marc handles the technical side: planning, structural analysis, system integration and execution that remains traceable a decade later. An engineering mindset means no improvisation, only well-reasoned solutions for every roof.
Next step
Questions about your roof? We’ll go through them with you personally — the initial estimate is the easiest way in.
Clarity before commitment
Answers before you decide.
The key points are explained clearly, factually and without artificial urgency. For details, we assess your property in its project context.
Municipality check
Solar system in Kölliken: what matters locally
Single-family homes, agricultural buildings and smaller commercial roofs need different mounting systems. Before quoting, we review roof membrane, cable routing, inverter location and possible scaffolding logic.
Kölliken belongs to Canton Aargau. We therefore combine the local roof assessment with cantonal requirements for subsidies, permits, grid connection and documentation.
Roof potential
Canton Aargau guideline: approx. 1160 kWh/m² global irradiation per year.
Grid & utility
Grid operator in Kölliken according to ElCom: EWK Energie AG. Metering concept and registration are clarified before execution.
Permit
Notification via EVEN portal. Standard roof systems require no building permit. Parking lot solar: simplified approval. Aargau solar offensive supports quick action.
Subsidies & taxes
Aargau grants no general cantonal PV top-up per kWp for standard roof systems. The CHF 360–400/kWp (roof-integrated CHF 380/kWp) and the CHF 250/kWp parking-area bonus come from the national Pronovo one-time payment, not from the canton. At cantonal level, Aargau funds building-integrated and facade PV (integrated facade CHF 400/kWp, mounted facade CHF 200/kWp, from 75 degrees tilt, since 2025) and individually assessed large systems from ~100 kWp. In addition there is the full tax deduction (from 2026 with the net principle for the feed-in tariff). Exact rates: Energy Funding Programme 2025–2026, energieberatungAARGAU.
In the region
Solar installations in more municipalities in Canton Aargau
Your next step: an initial estimate in about 2 minutes.
Your key details produce a first orientation on price range, incentives and payback — a solid basis to talk through your project.
You know where you stand
A realistic span for your roof — not a rounded sales promise.
The technical side is built in
Electrical scope, metering and grid connection belong to the calculation from the start, not to a surprise afterwards.
You decide calmly
If it fits, a traceable quote follows. If it doesn’t, we’ll tell you that openly.
Start here
Quick to complete, concrete as a starting point for your building — and no obligation.
Direct contact
If the project is already more concrete.
If you prefer to speak directly or already have documents and project context at hand, you can reach us through the usual channels.
Works well for
Roof plans, photos, existing quotes, questions around electrical coordination or already defined project timelines.
Phone
Location
Kirchweg 32, 8102 Oberengstringen, Zürich, CH
Coverage
Complete PV systems with planning, installation, electrical coordination and commissioning across all German-speaking cantons.
Further reading
Helpful answers on solar in Kölliken
These guides answer the questions that come up most often before deciding on a solar installation.
PV permitting Canton Aargau
Roof or facade: when notification via EVEN is enough in Aargau, which protected areas require a permit and what to submit before installation.
Solar obligation in Canton Aargau: what builders must clarify before PV planning
Clarify when Aargau's solar obligation applies to new buildings, how the minimum area is calculated, and which exceptions must be evidenced before building submission.
Pronovo, AEW & tax rules Aargau
Explains how the Pronovo funding category, AEW feed-in model and the new Aargau tax rules from 2026 interact, and which project data needs to be consistently prepared.
PV battery storage Aargau
Assess when a battery storage system fits a PV system in Aargau: prepare self-consumption, AEW metering, grid connection, wallbox, heat pump and incentive logic cleanly.
All locations by canton and municipality
The locations directory gives you an overview of all cantons and municipalities and takes you straight to the information for your region.