Electricity on the wagon
The SWS-PowerBox® makes electricity from the wagon’s own motion.
Innovation and sustainability for rail
The cold chain is the first application; other loads that need energy on the wagon follow the same principle. Two builds of the same system, the Tower for retrofits on fleets already in service, the Underframe for new wagons and full rebuilds.
“With SWS-PowerBox®, we provide environmentally friendly power supplies for wagons that work.”
VTG Wagon keeper · IntermodalNews, Sep 2024
“It is the only real sustainable way to transport reefer containers.”
Rail Innovators Group On power wagons built around SWS technology · RailFreight.com, Feb 2025
For more information about our products, we are always happy to hear from you.
Focused on transport and logistics
Beat Wegmüller
Laurin Schrammel
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Built locally, with partners who know their railways
Rail works differently in every market. Rather than shipping from Graz into the world, we work with established rail suppliers on the ground, they build and service the PowerBox in their region.
Partnering across North America
The largest rail freight market in the world, and the one place the cold chain still moves almost entirely by road. Our partners on the ground know the market, its wagons and its operators.
HUSE LIVE
HUSE LIVE, part of Sujan Industries in Mumbai, is our partner for Indian rail: the SWS-PowerBox®, built in India, for Indian conditions.
Freightquip
Freightquip, an established rail supplier with its own workshop equipment and shunting vehicles, brings the PowerBox to Australia and New Zealand, and climbed under the wagon with us to prove it.
The SWS platform
Fleet, battery and cargo data are centralised in real time.
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What we have been up to
Customer workshop at LOCONI Intermodal in Warsaw
SWS at Manifest Vegas 2026: the cold chain meets North American logistics
Recognised among Austria's Top 10 startups
Advancing emission-free and autonomous energy solutions in rail freight.
CNA InnovationsPreis 2023: the SWS-PowerBox® wins the Sustainability category
SWS-PowerBox® training at the port of Trieste
Series production of the Tower version begins
On regular services across Europe, Hamburg–Budapest, Oslo–Narvik and Wrocław–Koper among them, with very different goods. The first units have passed 300,000 kilometres without any major problems.
A reefer container draws about 3.75 kW on average, so an 80 kWh box runs it for roughly 21 hours. Actual consumption sits between 1 and 6 kW depending on the goods, the setpoint and whether humidity control is needed, and the container should already be pre-cooled when it is connected.
Three ways. While the train runs, the wheelset recuperates about 0.13 kWh per kilometre, roughly 615 kilometres to fill an empty 80 kWh box with nothing connected. At the terminal or loading track, a Type 2 plug charges at up to 22 kW, so under four hours, and a CEE 32 socket works via adapter cable.
No. The installation does not affect the clearance gauge, G1 is complied with, and the wagon holds ERA certification. It runs on the European rail network without restriction.
None in the strict sense, operation is simple and every instruction sits on the inside of the service door. We still recommend a short session with the terminals involved, because understanding the system makes crews far more willing to use it.
SWS-PowerBox® Tower
1 × 24 V for additional wagon sensors
Parallel operation with up to 2 containers
Imprint
Humboldtgasse 12 /35
1100 Vienna
Austria
- Managing Director
- Patrick Sluga
- Business purpose
- Trading in goods of all kinds, in particular autonomous energy systems and related services, as well as services in the fields of automated data processing and information technology.
- Commercial register
- FN 542525 g, Regional Court for Civil Matters Graz
- VAT ID
- ATU76030439
- Chamber membership
- Austrian Economic Chambers (WKÖ)
- Applicable legislation
- Austrian Trade Regulation Act, ris.bka.gv.at
- Supervisory authority
- Municipal Authority of Graz, in accordance with the E-Commerce Act
You are welcome to address any complaint directly to the e-mail address above.
Terms and conditions
Our general terms and conditions apply to every offer, delivery and service. They cover scope, prices and payment, delivery and transfer of risk, warranty and liability, retention of title, and the place of jurisdiction.
The binding, signed version is the PDF below. <!-- TODO: replace with the in-page wording once legal counsel releases the HTML version -->
Download the general terms and conditions (PDF)Privacy policy
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