MPMC POWERTECH CORP., established in 2008 and headquartered in Shanghai Pudong, manufactures the stationary and mobile battery energy storage systems that EV charging station operators specify when the site's grid connection cannot support the peak demand of multiple vehicles fast-charging at once. This is fundamentally a demand-charge and peak-shaving problem, the same challenge MPMC's HBD-A Series solves for industrial facilities, applied specifically to EV charging infrastructure. This article covers how a stationary BESS buffers charging demand, a documented grid-connected EV charging deployment, and how to decide between a stationary HBD-A system and a mobile BCH unit for this application.

MPMC HBD-A Series battery energy storage system configured for grid-capacity-limited applications

Why EV Charging Demand Is a Peak-Shaving Problem

An EV charging station's grid connection is typically sized against an assumed average utilisation, but actual demand arrives in short, high-power bursts when several vehicles plug in simultaneously — a profile that closely resembles the demand-charge problem MPMC's HBD-A Series was built to solve for commercial and industrial facilities. Rather than paying for a grid upgrade sized to the rare worst-case charging peak, a battery buffer lets the site draw a lower, steadier average load from the grid while still delivering full charging power to vehicles during peak periods.

This distinction matters because a grid capacity upgrade to cover a rare worst-case scenario is often the most expensive and slowest-to-approve part of building charging infrastructure, while the battery buffer approach can bring a site into service against the grid connection it already has, with the upgrade decision deferred until — or avoided entirely if — actual utilisation growth genuinely requires it.

Sizing HBD-A for a Charging Station's Peak Demand

The HBD-A Series spans from the HBD-125-260 (125 kW / 261 kWh) up to the HBD-1000-2000 (1,125 kW / 2,170 kWh), with a DC-coupled HBD-DC 5000 variant reaching 5,015 kWh for the largest sites, all on liquid-cooled LFP cells rated for 8,000 cycles at 90% depth of discharge. All models support on-grid/off-grid switching and external inverter integration, so the same platform used for industrial demand-charge management applies directly to a charging station's grid-buffering requirement.

The table below highlights three representative HBD-A models for different charging-site scales; it does not list every available model or configuration.

MPMC HBD-A Series large-capacity battery energy storage unit — HBD-1000-2000,  for high-demand charging applications

Case Reference: Grid-Connected EV Charging, Netherlands

MPMC has delivered a Netherlands optical storage grid-connected EV charging station combining BCH-275-200 and BCH-500-1000 units at approximately 1 MWh scale — a mobile-charger-based approach to the same underlying grid-capacity problem, buffering peak vehicle charging demand against the site's existing grid connection. This project demonstrates the buffering principle in a charging-specific context, whether the buffering battery is packaged as a stationary HBD-A system or built into a mobile BCH charging unit. The same underlying logic also appears in MPMC's Dubai concrete batching plant case, where an HBD-500-1000 paired with on-site gensets reduced peak grid draw by roughly 20% — a non-charging example of the identical demand-buffering principle applied to a different type of intermittent, high-power load.

Stationary HBD-A or Mobile BCH: Which Fits a Given Site

The choice between a stationary HBD-A system and a BCH mobile charger with integrated storage depends on the site's permanence and configuration. A fixed charging station with a known, stable layout is typically better served by a stationary HBD-A system paired with separately installed chargers, since the HBD-A's larger capacity range and grid-services functionality (frequency regulation, self-consumption optimisation) extend beyond charging alone. A site that may relocate, expand incrementally, or needs the charger and battery as one delivered unit is better matched to BCH, which integrates the battery and charging hardware into a single deployable package.

A third scenario worth considering is a phased rollout: an operator uncertain about final site layout or long-term demand can start with a BCH mobile unit to prove out demand at a location, then transition to a larger stationary HBD-A installation once utilisation and layout are established, rather than committing to permanent infrastructure before the site's actual usage pattern is known.

Where MPMC Sits Against Other Charging-Site BESS Suppliers

MPMC's advantage for this application is offering both the stationary HBD-A and mobile BCH product lines from one manufacturer, so a charging network operator planning a mix of permanent hub sites and smaller or temporary locations can source both battery formats without switching suppliers. Competing suppliers focused only on stationary C&I storage, or only on mobile EV charging hardware, require an operator to manage two separate vendor relationships to cover the same range of site types.

Both product lines also share the same underlying LFP cell technology and warranty philosophy, so an operator standardising on MPMC across a mixed rollout of stationary and mobile sites is dealing with one set of technical documentation and one after-sales relationship rather than reconciling specifications from two unrelated manufacturers.

Checklist: Choosing a BESS for a Grid-Limited Charging Site

• Confirm the site's existing grid connection capacity and its peak charging demand gap

• Decide whether the site is permanent (favouring stationary HBD-A) or flexible/temporary (favouring BCH)

• Size battery capacity against simultaneous vehicle charging scenarios, not average utilisation

• Confirm on-grid/off-grid switching mode (gap vs seamless) meets the site's continuity requirement

• Ask whether additional grid services (frequency regulation, self-consumption) are wanted beyond charging support

• Verify warranty terms for the expected charging cycle frequency at the site

• Confirm remote monitoring coverage for unstaffed charging locations

• Request a documented reference deployment of a comparable charging application

Questions EV Charging Station Operators Ask