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 customised electronic systems for motorhomes and caravans. The company works closely with leading vehicle manufacturers and develops innovative solutions for energy supply, lighting controls and onboard electronics. As part of the AL-KO Vehicle Technology Group, products, advice and service will now be bundled under the AL-KO brand. Customers will continue to benefit from proven quality and technical know-how.
Toptron at a glance
- Founded in 1995 in Germany
- Specialist in custom electronic onboard systems for motorhomes and caravans
- Development of electronic control, energy, and lighting systems
- Long-standing development partner to leading recreational vehicle manufacturers
- Portfolio includes chargers, power distribution units, lighting controls, control panels, sensors, and cable sets
- Development of small and large series for OEM customers
- Since 2024 part of the AL-KO Vehicle Technology Group
- From August 2026 onwards, continued under the AL-KO VT name
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 customised solutions – from the initial idea to prototype development and series production.
Toptron's innovations include modern switch-mode power supply chargers, intelligent battery detection, central lighting controls, CI-Bus systems and solutions for wireless control of vehicle functions. This close cooperation with manufacturers results in individual electronic systems that are precisely tailored to the requirements of modern recreational vehicles.
The integration into the AL-KO Vehicle Technology Group further strengthens electronics expertise within the group. Customers benefit from an 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.
After the acquisition by DexKo Global and AL-KO Vehicle Technology, the Group's portfolio was strategically expanded to include custom electronic onboard systems. As part of the brand consolidation, existing Toptron products will in future be marketed under the AL-KO brand. The proven technology, technical know-how, as well as advice and service, will of course remain available.
Which 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 created in close cooperation with vehicle manufacturers and are individually tailored to their requirements.
Service and repairs for products of TOPTRON VTE Elektronik GmbH
We continue to offer professional repair services for older product generations of TOPTRON VTE Elektronik GmbH that are out of warranty.
Repairs within the warranty period are handled exclusively via the vehicle manufacturer's customer service.
For products out of warranty, we collaborate with an authorised external service partner.
Authorised service partner for repairs outside the warranty period:
Brokatec
Contact: Heinz-Peter Kamp, motorhome electronics expert
Tel: +49 (0) 2304 50858
E-Mail: info@brokatec.de
For enquiries about products out of warranty, please contact the service partner named above directly.
The repairs and billing are carried out directly between the customer and the service partner. The service partner operates independently and not on behalf of the manufacturer. Repairs outside the warranty period are performed by an independent authorised service partner.
No contractual relationship arises with Toptron VTE Elektronik GmbH.
Available Spare Parts
Distribution Unit Features
| Type 12 V Distribution | Parallel switching relay controlled via D+ signal | Charge B1 via diode and Polyswitch | Printed 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 the brand consolidation, the brand will in future be marketed under AL-KO. Products and services will remain available.
The previous Toptron content has been integrated into the AL-KO product world.
You can access the appropriate electronic solutions via the vehicle sections for motorhomes and caravans.
As all Toptron devices were developed as customer-specific solutions, distribution is exclusive to the manufacturers of caravans and motorhomes.
Please contact your dealer for spare parts. Spare parts that can be ordered directly are listed.
In most cases, testing followed by repair is not economically viable, as testing has to be performed manually.
In series production, all components are automatically tested with a suitable test adapter.
The available documentation can be found in the relevant user manual, which can be downloaded from the internet.
For further information, please contact your dealer.
If the installed 12 V distribution contains a parallel switching relay, this must be deactivated.
If there is a circuit in the 12 V distribution that also charges the starter battery, this must be deactivated.
A charging booster must be installed for charging while driving.
The installed charger must be suitable for a lithium battery.
Any installed battery sensors or shunts may not work as originally intended.
An overview is attached, showing which distribution contains a parallel switching relay and a charging device for 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 in most cases not available. Any available documentation can be found in the download area.
See the download area
Since there are many different lithium batteries on the market, this must be assessed on a case-by-case basis.
Please download the EL603/EL604 datasheet and check it with your battery manufacturer.
Please note that the charging curve is not determined by the charge controller when operating in bus mode.
In bus mode, the behaviour is defined by the bus master (usually the display panel together with the battery sensor).
