The roof leads, not the sales graphic.
Mounting, waterproofing, shading and electrical work are clarified on the actual building — not on a model.

SOLAR · STORAGE · HEAT PUMPS
In Walliswil bei Niederbipp, we support PV projects from the first roof check to documented handover. What matters is not only the module area but the full project flow.
Services
PV system, heat pump, storage, wallbox and monitoring from one team. Every service is planned as part of a working energy system.
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01 · Roof & facade
We review roof, structure, shading, cable routing, inverter and grid connection. Then we create a technically reliable quote.
Roof review · Electrical coordination · Commissioning
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Process
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.
Your key details are enough for a first, honest orientation — no appointment, no obligation.
We measure the roof by drone and clarify electrical work, regulations and the grid operator.
You see every line item individually, realistic ranges and sensible options such as storage or a wallbox.
We coordinate execution, registration, acceptance and documentation until your system is reliably connected to the grid.
Swiss facts
Applies to residential and commercial properties.
Economics
We map self-consumption, feed-in tariff and payback for your property — so you see early what the system realistically returns.
Proof
Our quotes are not built from flat packages, but from checked data, technical pre-assessment and clearly itemized positions.
Planning basis
Roof potential, irradiation and addresses are checked against GeoAdmin and BFE Sonnendach: the same datasets used by federal and cantonal bodies.

Property review
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
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
Every line item is shown individually instead of hidden in a flat package — so variants and ranges stay traceable from the start.

Execution standard
Regional clarification
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
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.
Questions about your roof? We’ll go through them with you personally — the initial estimate is the easiest way in.
Building in focus
Full-black, in-roof or flat-roof: in Walliswil bei Niederbipp we plan not for a datasheet, but for a building that has to stand up architecturally and within its local context.

Architecture first
In Walliswil bei Niederbipp, materiality, visual lines and technical details are aligned so the system fits the design language and performs cleanly over time.
Mounting, waterproofing, shading and electrical work are clarified on the actual building — not on a model.
The system grows precisely into the building: tight penetrations, protected facade, modules sliding into the rails, and an aesthetic that fits the architecture instead of disturbing it.
The inverter, registration and documentation are done, cable routes and labels stay traceable, and the roof becomes a calm, reliable energy source for everyday use.
Mounting, waterproofing, shading and electrical work are clarified on the actual building — not on a model.
The system grows precisely into the building: tight penetrations, protected facade, modules sliding into the rails, and an aesthetic that fits the architecture instead of disturbing it.
The inverter, registration and documentation are done, cable routes and labels stay traceable, and the roof becomes a calm, reliable energy source for everyday use.
Clarity before commitment
The key points are explained clearly, factually and without artificial urgency. For details, we assess your property in its project context.
Costs, storage, single-family home
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
The federal one-time payment covers at most 30 % of the investment cost of a reference system. For roof-integrated systems it is roughly 10 % higher, because the roof skin is part of the investment. The application is filed after commissioning via the Pronovo portal.
Swissolar puts a roof-integrated 50 m² system at roughly CHF 20,000 — after the one-time payment and tax deductions (Photovoltaics factsheet, February 2024). The exact figure depends on roof build-up, access and electrical work, not on module area alone.
Sizing
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 Bern is around 1150 kWh/m² per year. Whether that works on your roof in Walliswil bei Niederbipp 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.
Storage
Battery storage earns its money through self-consumption. Electricity you use yourself saves not only the energy price but also grid fees and levies — which is why it is worth more than exported electricity. That is what decides whether a battery pays off.
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. Relevant grid operators in Canton Bern: BKW, EWB.
Sources: Swiss Federal Office of Energy, factsheet on PV promotion (PDF) · Pronovo, one-time payment for PV · Swissolar, photovoltaics factsheet (February 2024)
Municipality check
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.
Walliswil bei Niederbipp belongs to Canton Bern. We therefore combine the local roof assessment with cantonal requirements for subsidies, permits, grid connection and documentation.
Canton Bern guideline: approx. 1150 kWh/m² global irradiation per year.
Relevant grid operators in the canton: BKW, EWB. Metering concept and registration are clarified before execution.
Roof-mounted systems in Bern require notification but no permit (if sufficiently adapted). In townscape protection zones or for cultural monuments, a building permit is required.
Bern has no cantonal PV top-up. What matters are the Pronovo one-time payment, municipal programs such as EWB in the City of Bern (CHF 80/kWp up to 30 kWp, then CHF 2,400 flat), and full tax deductibility. The winter electricity bonus only matters for large special-purpose systems above 100 kWp.
In the region
Your key details produce a first orientation on price range, incentives and payback — a solid basis to talk through your project.
A realistic span for your roof — not a rounded sales promise.
Electrical scope, metering and grid connection belong to the calculation from the start, not to a surprise afterwards.
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 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
Planning, PV installation, electrical coordination and commissioning across German-speaking Switzerland.
Further reading
These guides answer the questions that come up most often before deciding on a solar installation.
When a rooftop PV system in Canton Bern is permit-free, when only the eBau notification procedure applies, and which heritage and K-object exceptions trigger a building permit.
How high the Pronovo one-time payment for a PV system in Canton Bern is, how it splits into a base and a capacity payment, when to file the application, and how federal funding, the absence of cantonal PV funding and the tax deduction relate to each other.
In canton Bern the responsible grid operator depends on the location: ewb in the city of Bern, BKW across most of the rest of the canton, plus local utilities such as Localnet (Burgdorf). The contractor submits a technical connection application (TAG) before construction; building is only permitted after approval.
How big a PV battery storage system in canton Bern should be: sizing rules from Swissolar and SwissEnergy, a guide price of CHF 600-900/kWh, the ewb storage subsidy of CHF 100/kWh limited to the city area, and the duty to report retrofitted storage to Pronovo.
The locations directory gives you an overview of all cantons and municipalities and takes you straight to the information for your region.