Electric construction machinery draws harder and more erratically than a passenger EV, runs in dust and vibration that would trouble a standard charging cabinet, and very often has no grid connection to draw from at all. A mobile charger built for cars is not automatically the right answer for an excavator or a dump truck. MPMC POWERTECH CORP., established in 2008 and headquartered in Shanghai Pudong, positions specific models within its BCH Series around this exact duty.

Why Electric Construction Machinery Charging Is a Different Problem

Construction and mining machinery batteries are larger, the charge and discharge cycles are more demanding, and the site itself is dustier, rougher and further from permanent power than a road or car park. MPMC's BCH platform addresses electric construction machinery (ECM) charging specifically rather than treating it as a variant of EV charging, starting with how the unit converts power internally.

The Efficiency Question: DC Coupling

MPMC's BCH Series uses direct DC-side coupling between the battery and the charging output, delivering up to 87% discharge efficiency — a design MPMC states is specifically optimised for electric construction machinery, where AC-DC-AC conversion losses matter more given the size and frequency of charge cycles on a working site.

Built for Dust, Vibration and Repositioning

Sealed Liquid Cooling

The BCH-275-200 and larger models use a fully sealed liquid-cooled battery pack, which MPMC states prevents dust buildup — a specific answer to the airborne particulate a mine or earthworks site generates continuously. The same liquid-cooled architecture carries through to the BCH-800-600, described as suited to mines and construction sites directly.

Heavy-Duty Transport Features

The BCH-275-200 ships on a 3.5-tonne heavy-duty trailer with an integrated forklift hole for site repositioning, and C4 anti-corrosion coating as standard, with C5 optional on larger models — details that matter once a unit is expected to be towed and relocated across an active construction site repeatedly rather than parked once at the kerb.

MPMC BCH-800-600 mobile BESS charger

The Heavy-Duty End of the BCH Range

The BCH-800-600 is built for 1C charge and discharge performance, supporting rapid energy transfer and high-intensity delivery, with an explosion-proof breather for pressure relief in extreme conditions and a charging gun that supports simultaneous charge and discharge for more flexible site operation. The BCH-500-1000 adds UPS-grade AC output, with cabinet-enclosed activation for zero-downtime power protection, alongside the same liquid-cooled architecture.

Connector current rises with the model: 250 A per gun on the BCH-275-200, rising to 350 A per gun on the BCH-600-400, BCH-800-600 and BCH-500-1000, each fitted with two CCS2 guns for simultaneous charging. From DC input, MPMC states the BCH-275-200 reaches a full recharge in around an hour, which on a working site translates into a shift-change top-up rather than an overnight charge.

Fire Protection and Operating Envelope

The BCH-275-200 and larger models carry CE-certified aerosol fire protection built into the cabinet as standard, alongside the explosion-proof breather fitted to the BCH-800-600 for pressure relief. All are rated for -20°C to +50°C operation with derating above 45°C, and up to 3,000 metres altitude with derating above 2,000 metres — figures worth checking directly against a high-altitude mine site or a hot-climate construction project rather than assumed from a temperate-market datasheet.

A Documented Off-Grid Machinery Charging Project

MPMC's Norway reference documents a 2 MWh remote construction machinery charging system built from BCH units rated at 500 kW output and 1,000 kWh capacity each, with a CCS2 charger output of 360 kW / 400 A, enabling electric construction machinery to operate at a site with no grid access at all. This is the class of deployment the heavier BCH models are specified for — not a car park charging point, but a working site's entire machinery power supply.

MPMC BCH-800-600 mobile BESS charger — heavy-duty configuration

Where This Fits an Industrial Park or Mine Site

The same platform serves a second, quieter use case: industrial parks running electric forklifts, shuttles or maintenance vehicles, where a BCH-275-200 (150 kW DC output, 203.5 kWh storage, two CCS2 250 A guns, deployable within 24 hours) or a BCH-600-400 (400 kW DC output, 407 kWh storage, two CCS2 350 A guns) provides flexible energy replenishment without a grid infrastructure upgrade, drawing from PV, grid or an existing BESS as available.

Points to Confirm Before Specifying a Unit

• Match battery capacity and DC output to the machinery's actual daily energy draw, not a single peak reading.

• Confirm the liquid-cooling and dust-sealing specification against the site's actual particulate exposure.

• Check the trailer rating and forklift-hole provision if the unit will be relocated across the site regularly.

• Establish whether simultaneous charge-and-discharge operation is required for the machinery mix on site.

• Confirm C4 or C5 anti-corrosion coating against the site's environmental severity.

• Verify the CCS2 gun current rating against the specific machinery connector requirement.

• Ask for the Norway or a comparable reference project's load profile if the site has no grid access at all.

• Decide the power source mix — genset, PV, grid or existing BESS — before the unit is ordered, since it changes the AC input configuration.

Questions Construction and Mining Buyers Ask