Mobile workshop · Germany & Europe
Mobile energy and onboard electrical systems for motorhomes, expedition vehicles and boats
Planning, retrofitting, troubleshooting and service for solar systems, lithium batteries, charging, inverter, heating, water and onboard electrical systems – directly on site.
Services
Technology that must work reliably on the road and on the water.
KW Service & Repair supports customers with modern energy, heating, water and onboard electrical systems – from individual retrofits to complex troubleshooting.
Energy & autonomy
Solar systems, lithium batteries, charging boosters, inverters, shore power, battery management and energy monitoring.
Onboard systems & energy management
Planning, installation, optimization and diagnosis of complex onboard electrical systems with clean structure and traceable technology.
Troubleshooting & diagnostics
Systematic troubleshooting for intermittent faults, charging problems, failures and unclear technical issues.
Heating & climate
Service, diagnostics and optimization of heating, hot water, refrigeration and air-conditioning systems.
Water systems
Water treatment, filtration systems, pump technology and individual supply solutions.
Custom solutions
Individual technical solutions for motorhomes, expedition vehicles, boats and commercial vessels.
Mobile workshop
Not only the technician comes to you. A fully equipped mobile workshop does too.
Many jobs can be checked, prepared and carried out directly on site. This saves unnecessary workshop downtime and enables solutions where the vehicle or boat is actually used.
The base is Schotten in the Vogelsberg region of Germany. Jobs are carried out throughout Germany and elsewhere in Europe – travel and appointment are agreed in advance.
How it works
From your first message to a finished system.
To make an on-site visit worthwhile, we clarify the details first. That saves time, travel and unnecessary cost.
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01
Enquiry
You briefly describe the vehicle or boat, the location and the problem or project – photos of the installation are welcome.
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02
Assessment
You receive feedback on what makes technical sense, what effort to expect and what should be prepared beforehand.
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03
Appointment & visit
Date and location are agreed. The mobile workshop arrives with tools, measuring equipment and the required components.
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04
Handover
The system is tested, explained and handed over. You know afterwards how it is built and what to look out for in daily use.
Projects
From small vans to commercial shipping.
Every project is different. That is why KW Service & Repair does not deliver off-the-shelf solutions, but technically clean systems for the specific application.
About Kai Wätjen
Technology is not just a profession here. It is a passion.
After training as an information electronics technician for devices and systems and attending the master craftsman course in electrical engineering, Kai Wätjen worked for many years as a service technician in electronics, refrigeration and heating technology.
He has been on the road with a mobile workshop since 2014. Since 2025 he has focused completely on KW Service & Repair, supporting customers in Germany and abroad – from small campers to commercial shipping in the Netherlands.
The goal: not simply installing components, but creating solutions that work reliably.
Partners & manufacturers
Brand technology for demanding systems.
KW Service & Repair works with proven manufacturers and components from energy, onboard electrical, heating and supply technology.
Typical requests
What customers often contact KW Service & Repair for.
For motorhomes, expedition vehicles and boats, reliable technology on the road and on the water is essential.
Motorhome electrics inspection & repair
Troubleshooting, reorganisation and service for onboard electrics, fuses, charging problems and failures.
Onboard systems & energy management
Clean structure for batteries, chargers, inverters, solar, shore power and consumers.
Lithium, solar & charger retrofits
Planning and installation of modern energy supply for more autonomy in vehicles and boats.
Diesel heating, hot water & water systems
Service, diagnostics and optimisation of heating, hot water, pump and filter systems.
Frequently asked
What people usually ask before getting in touch.
If your question is not covered here, just call or write.
Where do you work?
The base is Schotten in the Vogelsberg region of Germany. Jobs are carried out throughout Germany and elsewhere in Europe, including regular work for commercial shipping in the Netherlands. Travel and appointment are agreed before the visit.
What does a job cost?
That depends on the vehicle or boat, the existing installation and the scope of work. After a short description of your project you receive an assessment of effort, material and travel before an appointment is confirmed.
What information do you need for an enquiry?
Useful details are the vehicle or boat type, your location and the desired service location, a short description of the problem or project, the existing equipment and manufacturers, plus two to four clear photos of the system or installation.
Can everything really be done on site?
Most things, yes. The mobile workshop carries tools and measuring equipment, so inspection, troubleshooting, retrofitting and service are possible directly at the vehicle or boat. For larger conversions the scope is discussed in advance and the visit planned accordingly.
Do you also work on boats and commercial vessels?
Yes. Alongside motorhomes and expedition vehicles, boats and commercially used vessels are part of everyday work, including commercial shipping in the Netherlands.
Which manufacturers do you work with?
Among others Victron Energy, Mastervolt, Autoterm, Webasto, Eberspächer, Fraron, SuperVolt, Pundmann, SCHEER Heizsysteme and CaraWater. If equipment is already installed in your vehicle or boat, the existing setup is used as a basis wherever possible.
Can an existing installation be extended?
In many cases yes. Before extending, the wiring, fusing, charging technology and battery capacity are checked against each other. Only then is it decided what should sensibly be added or replaced.
Planning a retrofit or need help with a technical fault?
Send an inquiry or call directly. These details help prepare the service visit properly:
- vehicle or boat type
- location and desired service location
- short description of the problem or project
- existing technology and manufacturers, if known
- 2–4 meaningful photos of the system or installation situation
Enquiry
Send your enquiry right here.
Fields marked * are required. Photos of the installation can be sent afterwards by e-mail or WhatsApp.