A public charging operator buys against different arithmetic from a fleet owner. The unit is not a cost centre supporting an operation; it is the revenue-generating asset itself, judged on utilisation, uptime, conversion efficiency and how quickly it reaches revenue after a site is secured. From a procurement perspective mobile equipment earns its place for one reason: it generates income at locations where a permanent connection has not been built. MPMC POWERTECH CORP., established in 2008 and headquartered in Shanghai Pudong, publishes a BCH range from 80 kW to 600 kW rated DC output with 70 kWh to 1,075 kWh of storage.

MPMC BCH-500-1000 mobile BESS charger

Time to Revenue Is What Justifies Mobile

A permanent site is a sequence of lead times: connection application, utility works, civil construction, commissioning. Each is measured in months and none generates income. MPMC lists full operational status as achievable within 24 hours of deployment with no permanent grid infrastructure.

The commercial consequence is that a mobile unit can test a location before capital is committed to it. Real utilisation data from a temporary installation is a better basis for a permanent investment decision than a traffic study, and the unit moves on if the site disappoints.

Operator Metrics and What to Verify

Efficiency Is a Margin Question Here

For an operator reselling energy, every conversion loss sits directly in the margin between electricity bought and the session sold. MPMC lists maximum system efficiency of up to 91%, which is the figure to interrogate rather than accept, since peak efficiency and efficiency across the working range are not the same measurement.

Storage adds a consideration a grid-tied charger does not have: energy passes through the battery on its way to the vehicle, so round-trip losses apply. Against that, the same storage allows energy to be bought when it is cheapest and sold when demand is highest, which on a time-of-use tariff can more than recover the difference. Both sides belong in the model.

Choosing Ratings for a Public-Facing Site

Public charging rewards speed differently from depot charging, because a driver waiting is a driver comparing operators. MPMC lists CCS2 as standard with CCS1, GB/T and CHAdeMO as options, a DC output voltage range of 50 to 1,000 V on the BCH-275-200 and above, and two DC guns from that model upward at 250 A and 350 A respectively.

Storage capacity then governs how many sessions can be served before the unit needs replenishing, which on a busy site determines whether the asset stays available through a peak period. That calculation should run against expected session energy rather than nameplate capacity.

MPMC BCH-275-200 mobile BESS charger

Integrating With the Platform Already in Use

MPMC lists an EMS with 4G connectivity and OCPP 1.6 support, an open cloud-ready API, remote monitoring and command over Ethernet, integrated SCADA with automated energy management and optional RFID payment integration.

For an operator the items to confirm are narrower than the feature list suggests: which OCPP profiles are supported rather than which version, whether session records reconcile with the billing system, and whether remote diagnostics identify a fault well enough to dispatch the right part first time. A second visit costs more than the fault did.

Siting, Weight and What a Landowner Will Accept

Mobile does not mean unconstrained. MPMC lists the BCH-80-70 at 880 kg with six units per 20 ft container, the BCH-275-200 at 2,800 kg on a 3.5 t trailer with an integrated forklift pocket, and larger models at 8,300 kg, 15,000 kg and 19,800 kg, with a 20 ft container footprint at the top of the range.

For an operator negotiating short-term access to a car park or forecourt, weight and footprint are frequently what the landowner actually cares about, alongside how the installation looks to their customers. Confirming ground bearing, standing area and handling method before signing a site agreement avoids renegotiating it afterwards.

Uptime Is a Commercial Specification

For a public operator a unit that is offline is worse than one that is slow, because a driver arriving at a dead charger rarely returns. Remote diagnostic depth, alarm routing and the speed with which the right part reaches site are therefore commercial requirements rather than technical details.

Published warranty terms are 3 years or 1.6 MWh per kWh of total output for the BCH-275-200 and larger models, with battery performance at 5 years or 2.57 MWh per kWh and end-of-life retention of at least 70%. On a well-used public site the throughput allowance is reached before the calendar term, so expected annual energy delivered should be checked against it.

Published Charging Installations

MPMC lists a Netherlands 1 MWh grid-connected charging station using a 500 kW / 1,000 kWh integrated unit, a further Netherlands renewable-powered station combining the BCH-275-200 with the BCH-500-1000, and a Norwegian deployment at 2 MWh with 500 kW per unit and CCS2 output of 360 kW at 400 A.

These describe the class of installation supplied rather than a revenue expectation for a different location, which follows its own traffic, tariff and utilisation.

Operator Due Diligence Points

• Confirm simultaneous charging behaviour on both connectors at rated output.

• Ask for efficiency across the working range, not only the peak figure.

• Confirm which OCPP profiles are supported and that session records reconcile with billing.

• Establish remote diagnostic depth and the spares response arrangement.

• Model storage capacity against expected session energy through a peak period.

• Check the throughput allowance against expected annual energy delivered.

• Confirm ground bearing, standing area and handling method before signing a site agreement.

• Identify the recharge route at each site, including a fallback.