Toptron is now AL-KO VT
Electronic onboard systems for motorhomes and caravans
Proven electronics expertise within the AL-KO Vehicle Technology Group ("AL-KO VT")
Since 1995, Toptron has been developing bespoke electronic systems for motorhomes and caravans. The company works closely with leading vehicle manufacturers to develop innovative solutions for energy supply, lighting control and onboard electronics. As part of the AL-KO Vehicle Technology Group, products, consultancy and service will in future be bundled under the AL-KO brand. Customers will continue to benefit from proven quality and technical expertise.
Toptron at a glance
- founded in 1995 in Germany
- Specialist in bespoke electronic onboard systems for motorhomes and caravans
- Development of electronic control, energy and lighting systems
- Longstanding development partner to leading recreational vehicle manufacturers
- Portfolio includes chargers, power distribution units, lighting controls, control panels, sensors and wiring harnesses
- Development of small and large series for OEM customers
- Since 2024 part of the AL-KO Vehicle Technology Group
- Has been continuing under the name AL-KO VT since August 2026
What is Toptron?
Innovation partner for intelligent onboard electronics
Since 1995, Toptron has been developing electronic systems that enhance the comfort, safety, and energy efficiency of modern motorhomes and caravans. The company works closely with vehicle manufacturers to develop bespoke solutions – from the first idea and prototype development to series production.
Toptron’s innovations include state-of-the-art switch-mode chargers, intelligent battery detection, central lighting controls, CI-Bus systems, and solutions for wireless control of vehicle functions. Individual electronic systems are created through close collaboration with manufacturers, tailored precisely to the requirements of modern recreational vehicles.
Integration into the AL-KO Vehicle Technology Group further strengthens the electronics expertise within the company group. Customers benefit from even closer integration of innovative onboard electronics with AL-KO’s chassis, running gear and comfort solutions.
Is Toptron part of AL-KO?
Electronics expertise in a unified brand environment
Yes. Toptron is part of the AL-KO Vehicle Technology Group.
With the takeover by DexKo Global and therefore AL-KO Vehicle Technology, the group’s portfolio was purposefully expanded to include bespoke electronic onboard systems. As part of brand consolidation, existing Toptron products will in future be marketed under the AL-KO brand. The proven technology, technical know-how, advice and service naturally remain available.
What products does Toptron offer?
Intelligent onboard electronics for motorhomes and caravans
Toptron develops electronic systems that improve the comfort, safety and energy efficiency of modern recreational vehicles. The solutions are developed in close cooperation with vehicle manufacturers and are individually tailored to their requirements.
Service and repair for products by TOPTRON VTE Elektronik GmbH
For older product generations from TOPTRON VTE Elektronik GmbH that are outside the warranty period, we continue to offer a professional repair service.
Repairs within the warranty period are still handled exclusively via the manufacturer of the recreational vehicle and its customer service.
For products outside the warranty period, we cooperate with an authorised external service partner.
Authorised service partner for repairs outside the warranty period:
Brokatec
Contact: Heinz-Peter Kamp, expert in motorhome electronics
Tel: +49 (0) 2304 50858
E-Mail: info@brokatec.de
Please direct enquiries about products outside the warranty period directly to the service partner named above.
All repairs and billing are handled directly between the customer and the service partner. The service partner acts independently and not on behalf of the manufacturer. Repairs outside the warranty period are carried out by an independent, authorised service partner.
No contractual relationship arises with Toptron VTE Elektronik GmbH.
Available spare parts
Equipment distribution units
| Type 12 V distribution | Parallel switching relay controlled via D+ signal | Charging B1 via diode and polyswitch | Circuit board |
|---|---|---|---|
| EL537 | yes | permanent | 7750V1 |
| EL537OP | no | permanent | 7750V1 |
| EL565 | yes | permanent | 7784V3 |
| EL624 | yes | permanent | 7847 |
| EL626 | yes | permanent | 7847 |
| EL654 | yes | permanent | 7948 |
| EL654OLB1 | no | no | 7948 |
| EL654OP | no | permanent | 7948 |
| EL747 | no | via relay | 8080 |
| EL747V1 | no | no | 8219 |
| EL728 | yes | permanent | 8012V2 |
| EL728OP | no | permanent | 8012V2 |
| EL768 | no | via relay | 8125 |
| EL768OLB1 | no | no | 8125 |
| EL769 | no | via relay | 8080 |
| EL769V1 | no | no | 8219 |
Frequently asked questions about Toptron
Toptron has not disappeared, but is now part of the AL-KO Vehicle Technology Group.
As part of brand consolidation, the brand is now marketed under AL-KO. Products and services remain available.
Previous Toptron content has been integrated into the AL-KO product world.
Via the vehicle categories for motorhomes and caravans you will find the right electronic solutions.
As all Toptron devices were custom-developed for our customers, they are distributed exclusively to manufacturers of caravans and motorhomes.
Please contact your dealer with regard to spare parts. Spare parts available for direct order are listed.
In general, an inspection followed by repair is not economically viable, as the inspection must be carried out manually.
During production, all parts are automatically tested with an appropriate test adapter.
The available documentation can be found in the relevant user manual, which can be downloaded from the internet.
You can find further information at your dealer.
If the installed 12 V distribution includes a parallel switching relay, this must be deactivated.
If there is a circuit in the 12 V distribution that 'parallel-charges' the starter battery, this must be deactivated.
A charging booster must be installed for charging during driving.
The installed charger must be suitable for lithium batteries.
Any existing battery sensors or shunts may no longer work as intended.
An overview is attached here: list showing which distribution units include a parallel switching relay and a device for charging the starter battery.
You will also find instructions in the download area for deactivating the parallel switching relay and starter battery charging.
Circuit diagrams are usually not available. All available documentation can be found in the download area.
see download area
As there are many different lithium batteries available on the market, this must be decided on a case-by-case basis.
Please download the EL603/EL604 datasheet and contact the battery manufacturer using this information.
Please note that the charging curve is not determined by the charge controller when it is operating in bus mode.
In bus mode, behaviour is dictated by the bus master (usually the display panel together with the battery sensor).
