IN Brief:
- Osprey has installed its first battery at a UK charging site.
- The system supports three 75kW chargers through a low-voltage connection.
- Operational data will inform possible deployment elsewhere on the network.
Osprey Charging has installed its first battery energy storage system at a UK charging location, using local storage to support three 75kW rapid chargers through an existing low-voltage grid connection.
Deployed at the Lamb & Flag site on the A40 near Abergavenny, the system supplements available grid supply when several vehicles charge simultaneously. The arrangement allows a higher combined charging load than the underlying connection could provide alone.
Palmer Energy Technology supplied the battery system, while Osprey’s Iris platform will monitor grid imports, charger demand, battery use, and operating costs. Data from the installation will inform decisions on possible deployment at other constrained sites.
Many charging projects encounter locations where customer demand, access, and available space are adequate but network capacity is not. Reinforcement can require new cables, substations, wayleaves, civil works, or upstream upgrades beyond the site boundary.
Battery-backed charging separates installed charger capacity from the instantaneous grid-import limit. Energy can be stored during quieter periods and discharged when vehicle demand exceeds the connection rating, although the available uplift is governed by battery power, usable capacity, state of charge, and the length of each charging peak.
Designing around a constrained connection
Because the site remains on a low-voltage supply, active power management becomes central to operation. The control system must balance charger demand, battery limits, and grid import without exceeding the agreed connection capacity or creating unstable transitions between operating modes.
The battery cannot provide unlimited additional charging, since repeated high-power sessions may deplete its usable energy before demand subsides. Once the state of charge falls, the site becomes increasingly dependent on the underlying connection while the battery recovers.
Site utilisation, vehicle dwell time, arrival patterns, and charging curves therefore influence whether the design can maintain its intended performance. A location dominated by short, separated peaks may suit storage better than one experiencing sustained high utilisation throughout the day.
Thermal management, fire detection, isolation, protection coordination, earthing, metering, and communications must also be integrated with the chargers. Where separate converters serve the battery and charging equipment, harmonic performance and interaction between power-electronic systems require assessment across several operating states.
Battery-backed depot charging is already following a similar design route through the Allye MAX300 mobile storage platform, which supports higher charging power where permanent connection capacity is limited. Osprey’s installation applies the principle to a public rapid-charging location.
Storage becomes part of charging architecture
Several battery-backed configurations are now entering the market, ranging from chargers with integrated cells to site-level systems connected through shared electrical infrastructure. Each approach creates different requirements for maintenance, redundancy, conversion losses, equipment replacement, and later expansion.
Commercial performance depends on more than avoided reinforcement cost. Battery degradation, electricity tariffs, standing charges, maintenance, conversion losses, and charger utilisation all shape the lifetime case.
A lightly used system may struggle to recover its capital cost, while an undersized battery may contribute little during sustained demand. The design therefore needs to reflect realistic traffic and charging data rather than charger nameplate ratings alone.
Monitoring through Iris will show how frequently the battery discharges, whether it recovers between sessions, how much usable charging capacity it adds, and whether operating costs match the original assumptions. Seasonal changes in traffic, vehicle efficiency, battery temperature, and electricity use will also affect performance.
Battery support will not remove the need for conventional reinforcement across the charging network. High-utilisation hubs, fleet depots, and motorway sites may still require dedicated high-voltage supplies, new substations, and upstream capacity upgrades.
At Abergavenny, the installation provides a live test of an alternative design route where reinforcement timing or cost does not align with the commercial programme. Its value will be determined by charger availability, battery performance, and the additional energy delivered through a connection that would otherwise impose a lower operating ceiling.
