Solar PV Installation Company
· Lake Constance & High RhineYour energy. Your system.
All from one source.
We develop and build your complete energy supply as one piece, from the PV system and the battery storage through to the charging station.
Complex energy projects, thought through to the end.
High loads, a peak shaving tariff (RLM) or an existing installation that could do more? We build energy systems that run reliably even under demanding conditions, with a fixed price and one contact for everything.
How our system works- One contact personFrom the first conversation to the annual maintenance, one contact for the entire system.
- Fixed price, no add onsCalculated bindingly, not made pretty by optimism.
- What is there gets usedWe integrate the components you already have instead of replacing them across the board.
Your solar PV installation company with a system
Following a modular principle: fixed core building blocks, freely combinable modules, from the single family home to the large scale plant. You only pay for what you really need.
For everyone
PV system
The basis of your supply, sized precisely to your consumption, roof area and expansion plans.
Battery storage
Store your own solar power and use it in the evening. Sized to fit your household and expandable at any time.
Charging station
A wallbox for your electric car, cleanly integrated into your installation and optimised for self consumption.
For commerce & industry
Scalable commercial storage
Stackable units that combine into powerful storage systems with almost no extra effort. Developed and built by us.
Load management & sector coupling
Control loads intelligently, integrate charging infrastructure, maximise self consumption.
Backup power (UPS)
For banks, data centres and safety relevant buildings, with a link to control systems or generators.
Tenant power & billing
Neighbourhood concepts including end user billing for electricity and charging stations.
Energy audit
Real load profile measurements over weeks or months as the basis for economically sound sizing.
Not sure what you need?
We assess your requirements on the basis of real load data and tell you honestly what pays off.
Clarify your needs
How your system fits together
One shared system bus that every module docks onto. You can join at any point, even with an existing installation.
Join at any point
Dock on modules, integrate what is already there. You can join at any point, even with an existing installation.
★ In house development: storage
We develop and build our commercial storage ourselves, among other things on a compressed air basis (CAES). Plus thermal storage and alternative systems such as TES, hydrogen and N₂.
One system · one contact
Energy
from one source.
From the first measurement to the annual maintenance. Planned, built and looked after by one team.
Discuss your projectHow your project runs with us
Clear phases. You know at any time where your project stands and what happens next.
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Phase 01
Consultation and measurement
We clarify your consumption analysis and how your company is developing. For complex projects an energy audit with real load profile measurements over several months.
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Phase 02
Roof analysis and fixed price
Our own roofing company inspects the roof structure by drone and in person. After that you get a binding fixed price offer with no hidden items.
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Phase 03
Installation and maintenance
We build, commission and look after your installation long term with suitable maintenance contracts, for large projects also in stages.
Why a specialised installation company makes the difference
As soon as high loads, peak shaving tariffs or existing installations come into play, things get technically demanding. We come from machinery, plant and vehicle engineering and bring 25 years of experience in making complex systems run.
With peak shaving we cut short term load peaks before they get expensive. With the right combination of PV, storage and dynamic load management these peaks can often be reduced considerably.
We live the energy transition, not just on paper.
GWL-Design is more than a PV manufacturer. We see ourselves as general planners for complete energy systems in commerce and industry, based in Rielasingen-Worblingen for projects all over Germany and Europe.
Our team of tradespeople, engineers and technicians builds everything from the single family home to the large scale plant on the same modular principle. We travel to our sites 100 percent electrically, and with our Gambia project we support schools with photovoltaics.
- 100 % electric to the site, every day
- Live reference tenant power in our own office building
- Gambia project for schools without a reliable power supply
Ready for your
energy system?
A first conversation is free of obligation and gives you clarity on options, costs and next steps.
Frequently asked questions (FAQ)
Answers to what commercial clients, developers and housing associations ask us regularly.
For everyone
What does your modular principle cover?
The PV system and the inverter form the basis, plus battery storage, backup power (UPS), charging stations, tenant power and billing as needed. You only pay for what you really need.
Can you integrate an existing solar installation?
In most cases yes. We check the existing technology and integrate it sensibly into the new overall system instead of replacing it across the board.
Which area do you work in?
From Rielasingen-Worblingen within a radius of around 75 kilometres, which covers Singen, Konstanz, Radolfzell, the High Rhine and the entire Lake Constance region. Larger projects we also carry out all over Germany and Europe.
What does an enquiry cost?
The first enquiry is free. A detailed initial consultation including a needs analysis is often free as well, depending on the size of the project, or it is credited when you place the order.
For commerce & industry
Who benefits from photovoltaics in commerce and industry?
Above all companies with high self consumption during the day, a peak shaving tariff or large roof areas. We assess the economics on the basis of your real load data.
What is peak shaving (RLM) and what does it bring?
Peak shaving reduces short term load peaks with storage and load management. With tariffs that include a demand charge this can mean considerable savings, depending on the load profile.
Do you also offer energy audits?
Yes. For complex projects we measure over several weeks or months. At a bank reference project it was more than 30 measuring points over three quarters of a year.
Let us talk about your project
Tell us briefly what it is about. We will get back to you promptly.