The technical groundwork, written by the engineers who build the packs.

Switching from lead-acid to LiFePO4 can cut operating costs substantially while raising productivity, because lithium packs last three to five times longer and need no maintenance. But four variables decide whether the pack fits the job.

Voltage matching. The pack must match the truck's system voltage — typically 24 V, 48 V, 72 V or 80 V. A mismatch either fails to run the truck or derates it permanently.

Capacity sizing. Work from daily watt-hours, not from the Ah figure on the old battery. Add a 10–15 % buffer for cell ageing and low-temperature derating.

BMS compatibility. Active cell balancing, CAN bus communication and an IP65-rated enclosure are the baseline. Passive balancing alone will show up as SOC drift after a few thousand cycles.

Charging speed. Fast-charge capable packs reach full charge in one to three hours instead of overnight, which is what makes opportunity charging — and the elimination of the second battery per truck — possible.

Our standard packs are built for major truck brands and, in most cases, are designed as drop-in replacements with minimal wiring modification. Most industrial forklifts can use the 51.2 V / 280 Ah pack, which fits Heli and Hangcha CPD series trucks and most other platforms with minimal modification.

Selecting a lithium battery for a 3-tonne truck requires aligning pack architecture, electrochemistry and operational duty cycle. The industry baseline converges on LiFePO4 for its thermal stability, cycle life and lower total cost of ownership.

For heavy-duty material handling, a high-discharge 1P or 2P LFP pack rated at 80 V or 96 V with a continuous 1.0–1.5 C rate and 2–3 C peak capability delivers reliable torque without excessive voltage sag. Three tiers cover most operations:

Standard warehouse (80 V / 200 Ah) — 1.0 C continuous, 2.0 C peak, 3,000 cycles, passive balancing with CAN 2.0, forced air cooling, −20 to +60 °C.

Heavy-duty outdoor (96 V / 400 Ah) — 1.5 C continuous, 3.0 C peak, 4,000+ cycles, active balancing with J1939, liquid cold plate, −30 to +60 °C.

High-frequency multi-shift (80 V / 304 Ah) — 1.5 C continuous, 3.0 C peak, 5,000+ cycles, active balancing with predictive SOC/SOH, hybrid liquid and air cooling, −20 to +55 °C.

Critical success factors are module-level thermal management, active BMS balancing for consistent SOC and SOH tracking, and structural integration that meets industrial vibration standards. Cell temperature delta should stay under 3 °C under load.

The C-rate expresses discharge current as a multiple of rated capacity. A 280 Ah pack discharging at 1 C delivers 280 A; at 2 C, 560 A. The same pack asked to run at 2 C continuously when it is rated for 1 C will sag, derate and age prematurely.

Sizing sequence. Establish daily energy consumption in kWh from the truck's duty cycle. Divide by the pack's nominal voltage to get the required Ah. Add 10–15 % for ageing and temperature derating. Then check that the resulting pack's continuous and peak C-ratings cover the truck's acceleration and mast-lift current draw.

The common failure mode is buying on Ah alone. A pack with the right capacity and the wrong discharge class will disappoint in exactly the conditions the buyer was trying to fix.

The choice hinges on three engineering variables: deployed capacity, site structural constraints and deployment velocity.

Under 50 kWh — wall-mounted architectures optimise space efficiency with integrated PACK modules and compact BMS topology. Verify stud spacing and shear strength at the mounting plane.

100 to 500 kWh — rack-mounted designs balance thermal management, modular scalability and standardised busbar interfaces. Requires reinforced flooring and vibration dampening, with racks in the 800–1,200 kg range.

Above 1 MWh — containerised systems, where structural rigidity, forced-air or liquid cooling integration and centralised BMS communication become critical. Requires geotechnical surveys, foundation piers, crane access and wind/seismic compliance.

Selecting the wrong form factor introduces unnecessary structural reinforcement costs, thermal throttling or inefficient space utilisation — long before the cells become the limiting factor.

Without a valid UL listing, lithium battery PACK systems face customs rejection, retailer exclusion and significant liability exposure. The applicable standard depends on the end use: UL 1973 for stationary energy storage, UL 2580 for traction batteries, UL 62133 for portable assemblies.

The pathway typically spans 10 to 16 weeks, running through pre-assessment, laboratory validation, QIP resolution and finally listing with quarterly factory surveillance audits.

Schedule risk concentrates in documentation and in late design changes. Finalising PACK architecture with integrated thermal management and fault isolation before prototype fabrication, and specifying UL-listed components for busbars, connectors and enclosures, removes most of it.

Lithium batteries ship under the International Maritime Dangerous Goods Code, and the documentation set must be complete before the container is loaded.

UN38.3 test summary — evidence that the cell and pack design passed the transport test series, including altitude simulation, thermal cycling, vibration, shock, external short circuit, impact, overcharge and forced discharge.

MSDS — chemical safety documentation for the assembly.

Packing instruction — the IMDG-compliant packing method for the state of charge, packaging and palletisation used.

State of charge at shipment matters: packs travel at a reduced state of charge for transport safety, and this must be stated correctly on the documentation. Getting the paperwork right is the difference between a clean customs clearance and a container sitting at port.

Storage conditions affect both safety and the service life of a pack before it is ever installed. Key requirements cover separation distance between pallets, temperature control, prohibition of direct sunlight and ignition sources, and a defined state of charge for long-term storage.

Packs should be stored in a dedicated area with appropriate fire detection and suppression, segregated from other combustible materials, and rotated on a first-in-first-out basis so that no pack sits at an unmanaged state of charge for an extended period.