COMPLETE PV SYSTEMS · OPTIONAL STORAGE
For Solothurn, we plan photovoltaics with a focus on roof work, electrical coordination and a clean path to commissioning.
Solothurn, Solothurn
Official figures · Solothurn
All figures apply to the municipality of Solothurn and come from federal datasets — with source and date below.
Self-consumption
On the standard tariff of Regio Energie Solothurn, a purchased kWh costs 24.52 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 2.15 ct below last year (30.66 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 Solothurn, 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
Suitable roofs in Solothurn could produce 96.4 GWh of solar power per year, 27% of it between October and March. Adding façades raises the potential to 129.3 GWh and the winter share to 29%: 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
The federal plant register lists 416 photovoltaic systems in Solothurn with a combined 9.6 MW. Since January 2025, 49 systems with 1.1 MW 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 573 watts — rank 100 of 104 municipalities in the Canton of Solothurn.
Electricity prices: ElCom, category H4 (household, 4,500 kWh per year), standard product, 2027. Sources: SFOE, solar potential of Solothurn (PDF) · ElCom, electricity prices Solothurn · SFOE, electricity production plants (as of 2026-09-14) · Energy Ordinance, Art. 12
Figures with sources
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
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
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 Solothurn is around 1150 kWh/m² per year. Whether that works on your roof in Solothurn 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 earns its money through self-consumption: it shifts solar power from midday into the evening. With Regio Energie Solothurn, every kWh shifted this way is worth 24.52 ct instead of a feed-in payment of at least 6 ct — up to CHF 185 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 Solothurn, the connection conditions are set by Regio Energie Solothurn.
When battery storage makes senseServices
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
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
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.
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
The key points are explained clearly, factually and without artificial urgency. For details, we assess your property in its project context.
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.
Solothurn belongs to Canton Solothurn. We therefore combine the local roof assessment with cantonal requirements for subsidies, permits, grid connection and documentation.
Canton Solothurn guideline: approx. 1150 kWh/m² global irradiation per year.
Grid operator in Solothurn according to ElCom: Regio Energie Solothurn. Metering concept and registration are clarified before execution.
30-day notification before construction. eBau portal available for digital submission. Normal notification procedure for roof systems.
No general cantonal PV subsidy: through the Building Programme, Solothurn only funds the building envelope, heat pumps, wood heating and thermal solar — not PV electricity generation. For PV, the federal Pronovo one-time payment, individual municipal programmes and tax deductibility apply. Feed-in via Regio-Energie Solothurn. Neuendorf: model example with 27% utilization rate.
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
Complete PV systems with planning, installation, electrical coordination and commissioning across all German-speaking cantons.
Core services
The key services, tailored directly to Solothurn and the local requirements in your region.
Regional service
Canton Solothurn was among the first to fully implement MuKEn 2014. Regio Energie Solothurn offers seasonally differentiated compensation: 9.0 Rp./kWh in winter, 4.0–6.2 Rp./kWh in summer. This structure rewards winter production and makes storage economical. The southern Jura slopes around Solothurn and Grenchen benefit from above-average sunshine hours and ideal southern exposure.
Regional service
Solothurn prioritises incentives over mandates in energy policy. The seasonal tariff from Regio Energie (winter 9.0 Rp., summer 4.0–6.2 Rp.) creates a natural incentive for self-consumption optimisation and storage integration. The canton ranks 3rd nationally in solar thermal subsidy density – a sign of a mature, technology-savvy solar market on the southern Jura slopes.
Regional service
On the southern Jura slopes, commercial buildings between Solothurn and Grenchen offer large-area flat roofs with ideal southern exposure. Regio Energie's seasonal tariff structure (winter 9.0 Rp., summer 4.0–6.2 Rp.) makes self-consumption maximisation on commercial flat roofs a yield factor. The region's above-average sunshine hours – favoured by the Jura valley microclimate – deliver stable yield forecasts.
Further reading
These guides answer the questions that come up most often before deciding on a solar installation.
When notification is sufficient for a PV system on a roof or facade in Canton Solothurn, which 30-day deadline applies and which protected cases trigger a building permit.
How the connection request, technical connection conditions, installation notice, meter change, safety certificate and Pronovo data fit together in Canton Solothurn.
How the tax deduction for photovoltaics works in Canton Solothurn: existing buildings, new-build boundary, battery, Pronovo EIV and the net principle for feed-in payments.
How a bidirectional wallbox, PV system, electric car and building installation fit together in Canton Solothurn, including the technical, legal and tax limits to resolve first.
The locations directory gives you an overview of all cantons and municipalities and takes you straight to the information for your region.
