8.415m container flatbed semi trailer
The 8.415m flatbed semi-trailer is designed for medium-capacity mobile BESS applications, typically supporting 1035kWh. It serves as a balanced solution for projects that require more power capacity than compact systems, without the constraints of heavy-duty transport platforms.
Unlike smaller trailers focused on mobility or larger platforms built for maximum capacity, this model offers a practical middle ground-delivering sufficient energy capacity while remaining adaptable to a wider range of project environments.
Its size makes it suitable for urban and space-constrained sites, while still supporting stable operation of containerized energy storage systems. The flatbed design enables straightforward installation, reducing integration effort and improving deployment efficiency.
advantages of Polinovel semi-trailer
Single-Unit Capacity for Real Project Needs
Supports around 1035kWh, allowing many projects to be powered by a single trailer without requiring multiple smaller units.
No Need for Heavy-Duty Transport Setup
Delivers higher capacity while avoiding the complexity and constraints typically associated with large-scale trailer systems.
Better Access Than Large-Scale Platforms
The 8.415m size allows operation in more project sites, including locations where larger trailers are difficult to deploy.
Efficient Deployment with Flatbed Integration
Flatbed design supports direct installation of containerized systems, reducing setup time and simplifying on-site integration.
Specification
| Category | class | parameter |
| Type | 8.415m Platform Semi-Trailer | |
| Curb Weight | 4600 kg | |
| Rated Load Capacity | 13,800 kg | |
| Dimensions (L×W×H) | 8415 × 2550 × 1600 mm | |
| Chassis & Structure | Main Beam | H=500 mm; Upper/Lower Wing Plates: 10/12 mm; Web Plate: 6 mm |
| Deck | 3 mm checkered plate | |
| Container Locks | 12 sets of container-specific locks | |
| Suspension & Axle System | Suspension | 3-axle mechanical suspension (φ50, reinforced, wear-resistant plate) |
| Axle | 13T drum axle with mechanical adjustment arm, with ABS | |
| Leaf Spring | 10 pcs × 13 × 100 | |
| King Pin | Bolt-type 90#-10 | |
| Wheels & Tires | Tires |
12/R22.5 12++ 9pcs
|
| Steel Ring (Rim) |
22.5×9.0 16mm 9pcs
|
|
| Landing & Braking System | Landing Gear | 19-inch, 28T single-action |
| Brake System | ABS (4S/2M) | |
| Air Chamber | 4 double chambers | |
| Air Reservoir | Steel, 2 pcs | |
| Electrical & Accessories | Electrical System | 24V LED |
| Tool Box | 1 m fully sealed steel toolbox | |
| Spare Tire Carrier | 1 pc | |
| Rope Tightener | 20 pcs | |
| Rope Hook | 42 pcs | |
| Surface & Others | Painting Process | Electrostatic powder spraying |
| Paint Color | White (TBD) | |
| Nameplate | English model nameplate | |
| Transport Mode | 3 units bundled for bulk cargo transportation | |
Polinovel at a Glance
Company-level credentials. Certification status for specific configurations (CE, UL, IEC) available on request by target market.
How a BESS Container Mounts to This Trailer
Three steps from crane lift to a working mobile battery energy storage unit - no permanent modification to the trailer deck for standard container enclosures.
Step 1: Position & Lower the Enclosure
Crane the containerized BESS onto the deck. The 12 twist locks are pre-set at standard container corner casting positions, so the enclosure's corner fittings align with the lock points as the container is lowered into place.
Step 2: Engage the Twist Locks
Turn each twist lock handle to secure the container to the deck. This mechanical connection holds the BESS during transport. For non-standard enclosures, confirm lock positions with Polinovel engineering before production.
Step 3: Drop, Level & Connect
On site, deploy the 28T landing gear to support the loaded trailer, disconnect the tractor, and connect the BESS to the site's electrical interface. The trailer stays on its own legs - the tractor is free for other work.
Typical Application Scenarios
This trailer platform is designed for medium-scale energy projects where containerized BESS needs to be transported, deployed, and potentially relocated.
Commercial & Industrial Energy Projects
Supports around 1,035 kWh, allowing many medium-scale projects to be powered by a single trailer without requiring multiple smaller units.
Urban & Space-Constrained Sites
The 8.415m size allows operation in more project sites, including locations where larger trailers are difficult to deploy effectively.
Temporary & Transitional Power
Delivers higher capacity than compact trailers while avoiding the complexity typically associated with large-scale trailer systems. Suitable for projects where permanent infrastructure is not yet in place.
Multi-Site Deployment
The flatbed design supports direct installation of containerized systems, reducing setup time. When a project ends, the trailer can be moved to the next site.
Trailer-Mounted vs. Fixed Temporary Power Setups
Why a mobile semi-trailer platform adds flexibility over stationary skid-mount or container-drop approaches for medium-scale containerized BESS deployments.
| FACTOR |
Fixed / Skid-Mount Setup
|
Semi-Trailer Platform
|
| Relocation Speed | Requires crane or flatbed truck for each move | For relocation after initial installation, hitch tractor and go - no repeated crane mobilization required |
| On-Site Independence | Needs foundation or anchor system | 28T landing gear - tractor can leave |
| Container Securing | Custom brackets or welding required | 12 container-specific twist locks - mechanical securing |
| Multi-Site Flexibility | Intended for single-site deployment | Easier transport compared to fixed setups |
| Transport Cost per Move | Separate crane + transport hire each time | Avoids repeated crane and separate flatbed hire per move |
| Transport Method | Requires separate flatbed truck or crane for each move | Towed by tractor on its own 3-axle suspension |
Frequently Asked Questions
Q: What tractor unit is needed to pull the 8.415m semi-trailer?
A: Any tractor with a compatible fifth wheel and sufficient gross combination weight rating for the loaded trailer.
The trailer uses a bolt-type 90#-10 king pin, a widely used standard for semi-trailer coupling. With a 4,600 kg curb weight and 13,800 kg rated load capacity, the loaded trailer can weigh up to roughly 18.4 tonnes. Add the tractor's own weight to calculate the gross combination, then check against the tractor's GCWR and your local road permit limits.
Q: How do the 12 container twist locks interface with a BESS enclosure?
A: Twist locks engage standard corner castings on the container - the same mechanism used on shipping container chassis worldwide.
If your containerized BESS enclosure follows standard container corner casting positions, it drops onto the locks and is secured by turning each handle. Whether secondary tie-downs are needed depends on your enclosure's certification and the transport regulations in your market. For enclosures with non-standard footprints, Polinovel can relocate or add twist locks during production - provide your corner casting coordinates and the engineering team will confirm the layout.
Q: How does this compare to the 4.9m compact trailer and the 11m semi-trailer?
A: The 4.9m is a light towable trailer for small-scale mobile BESS up to 261 kWh; the 11m is a full-length semi for large-scale containerized BESS. This 8.415m sits between them, typically supporting around 1,035 kWh for common configurations.
The 4.9m compact trailer uses a drawbar hitch, two AL-KO axles, and mechanical brakes - a standard vehicle can tow it. The 11m semi-trailer is a full-length platform that may require a larger tractor class and wider road permits. The 8.415m is shorter than the 11m, which may reduce road permit requirements depending on your region and loaded gross combination weight. It also carries ABS braking and 12 container-specific twist locks that the 4.9m doesn't have.
Q: Does the ABS braking system require special tractor compatibility?
A: Most modern tractors with standard pneumatic brake coupling and a dedicated ABS power connector are compatible.
The trailer's 4S/2M ABS has its own sensors and modulators mounted on the axles. It draws ABS power from the tractor via a dedicated cable connection. If your tractor lacks this connector, the trailer still brakes through conventional pneumatic lines, but ABS functionality stays inactive. Check your tractor's connector setup and confirm whether your operating region mandates ABS for semi-trailers in this weight class.
Q: What road permits or weight-class considerations apply to this mobile BESS trailer?
A: Entirely dependent on your deployment country and the actual loaded gross combination weight.
The trailer's rated capacity is 13,800 kg on a 4,600 kg curb, but local bridge formulas, per-axle weight limits, and tractor-trailer combination permit requirements differ by jurisdiction. Polinovel can provide weight specifications and GA drawings to support local road-transport permit applications. Buyers should verify axle-group spacing requirements, gross combination limits, and any special transport permits with their own road authority before ordering.
Q: What information does Polinovel need to quote this trailer for my BESS?
A: Provide your BESS enclosure footprint, corner casting positions, total loaded weight, target country, tractor interface, quantity, and delivery port.
With this data, the engineering team can verify twist lock alignment, confirm axle-load distribution, recommend any deck reinforcement, and check compliance items for your target market. If you are also sourcing the containerized BESS from Polinovel, a single quote covers both the energy storage system and the semi-trailer platform as a matched package.
Need a smaller trailer? See our 4.9m compact flatbed trailer for mobile BESS up to 261 kWh. Need more capacity? See our 11m container flatbed semi-trailer for systems up to 3,392 kWh.
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