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 Lauwil, we focus on transparent quotes, defensible project phases and execution that remains traceable after handover.
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 Lauwil we plan not for a datasheet, but for a building that has to stand up architecturally and within its local context.

Architecture first
In Lauwil, 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 Basel-Landschaft is around 1150 kWh/m² per year. Whether that works on your roof in Lauwil 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 Basel-Landschaft: EBL.
Sources: Swiss Federal Office of Energy, factsheet on PV promotion (PDF) · Pronovo, one-time payment for PV · Swissolar, photovoltaics factsheet (February 2024)
Municipality check
For local PV projects, the municipal boundary is not the only factor: roof access, snow load, shading, meter cabinet and grid connection determine the project flow.
Lauwil belongs to Canton Basel-Landschaft. We therefore combine the local roof assessment with cantonal requirements for subsidies, permits, grid connection and documentation.
Canton Basel-Landschaft guideline: approx. 1150 kWh/m² global irradiation per year.
Relevant grid operators in the canton: EBL. Metering concept and registration are clarified before execution.
Normal notification procedure. Semi-rural Baselbiet with large agricultural areas — simplified agri-PV regulations. Combined roof renovation + solar is subsidized.
Energy package until 2030: CHF 51.25 million subsidy fund. Particularly attractive when PV is combined with roof renovation (renovation bonus). EBL 2026: guaranteed minimum tariff of 6.0 Rp./kWh (0–30 kW) or 6.2 Rp./kWh above 30 kW, plus the quarterly-adjusted BFE reference market price; guarantees of origin (HKN) are paid separately. Cantonal bonus for renovation.
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.
Classify PV projects in Basel-Landschaft cleanly: notification form, 30-day timing, core and protection zones, agricultural zones, e-permit workflow, Primeo grid process and Pronovo documents.
Prepare PV grid connection in Basel-Landschaft cleanly: connection request, regional technical rules, meter, acceptance, safety certificate and complete commissioning.
Prepare flat-roof PV on commercial and multi-family roofs in Basel-Landschaft cleanly: clarify roof condition, structure, fall protection, fire safety, electrical coordination, notification route and maintenance access before quoting.
When a virtual self-consumption community in the EBL grid area suits the building, metering concept and participating owners.
The locations directory gives you an overview of all cantons and municipalities and takes you straight to the information for your region.