Toptron is now AL-KO VT
On-board electronics 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 are now brought together under the AL-KO VT brand name. Customers continue to benefit from proven quality and technical know-how.
Toptron at a glance
- Founded in 1995 in Germany
- Specialist in bespoke on-board electronic systems for motorhomes and caravans
- Development of electronic control, energy and lighting systems
- Long-standing development partner for leading recreational vehicle manufacturers
- Portfolio includes chargers, power distribution units, lighting controls, control panels, sensors and cable sets
- Development of small and large production runs for OEM customers
- Part of the AL-KO Vehicle Technology Group since 2024
- Operating under the AL-KO VT brand name 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 customised solutions, ranging from the initial idea and prototype development to series production.
Toptron's innovations include modern switch-mode battery 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.
Integration into the AL-KO Vehicle Technology Group has further strengthened electronics expertise within the group. Customers benefit from an even closer integration of innovative onboard electronics with AL-KO's chassis technology and comfort solutions.
Is Toptron part of AL-KO?
Electronics expertise under one brand
Yes. Toptron is part of the AL-KO Vehicle Technology Group.
Following the acquisition by DexKo Global and integration into AL-KO Vehicle Technology, the Group's portfolio was strategically expanded to include customised on-board electronic systems. As part of brand consolidation, Toptron products are now marketed under the AL-KO VT brand name. The proven technology, technical know-how, advice and service remain available as usual.
Which products does Toptron offer?
Intelligent on-board 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 generations of products from TOPTRON VTE Elektronik GmbH that are outside the warranty period.
Repairs within the warranty period are handled exclusively by the recreational vehicle manufacturer's customer service.
For products outside the warranty period, we work 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 outside the warranty period, please contact the service partner named above directly.
Repairs and billing are handled directly between the customer and the service partner. The service partner operates independently and not on behalf of the manufacturer. Repairs are carried out by the independent authorised service partner, and 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 is now part of the AL-KO Vehicle Technology Group. As part of brand consolidation, the brand is now marketed under the AL-KO VT brand name. Products and services remain available.
Former Toptron products have been integrated into the AL-KO product world.
You can find the relevant electronics solutions via the vehicle sections for motorhomes and caravans.
As all Toptron devices were developed as customer-specific solutions, they are supplied exclusively to caravan and motorhome manufacturers.
Please contact your dealer for spare parts. Any spare parts available for direct order are listed in the spare parts section.
In most cases, inspection followed by repair is not cost-effective, as the inspection must be carried out manually.
During series production, all components are automatically tested with a suitable test adapter.
The available documentation can be found in the relevant operating manual, which is available to download online.
For further information, please contact your dealer.
If the installed 12 V distribution contains a parallel switching relay, it must be deactivated.
If there is a circuit in the 12 V distribution that also charges the starter battery, it must be deactivated.
A charging booster must be installed for charging while driving.
The installed charger must be suitable for lithium batteries.
Any installed battery sensors or shunts may not work as intended.
Our overview shows which distribution units include a parallel switching relay and a device for charging the starter battery.
You will also find instructions in the downloads section for deactivating the parallel switching relay and starter battery charging.
Circuit diagrams are usually not available. Any available documentation can be found in the downloads section.
Please see the downloads section.
As there are many different lithium batteries on the market, compatibility must be assessed on a case-by-case basis.
Please download the EL603/EL604 datasheet and consult the battery manufacturer using this information.
Please note that the charging curve is not determined by the charge controller when operating in bus mode.
In bus mode, the behaviour is determined by the bus master, usually the display panel together with the battery sensor.
