A trailer-mounted battery energy storage system (BESS) offers up to 1.84 MWh of storage capacity for construction sites, utility emergency response, remote industrial operations and other applications requiring temporary or mobile power.

Soneil Spark's Mobile Battery Energy Storage System integrates lithium iron phosphate (LFP) batteries and power controls into a towable trailer. Standard configurations range from 230 kWh to 920 kWh, with custom systems available up to 1,840 kWh. Power output ranges from 115 kW to 460 kW, with custom configurations reaching 920 kW.

The system is designed to provide power at locations where permanent electrical service is unavailable or where temporary power requirements make conventional installations impractical. Potential applications include construction sites awaiting utility connections, utility storm restoration, outdoor events, film production, and remote mining and agricultural operations.

The Mobile BESS can operate with grid power, generators or solar generation. Its hybrid operating capabilities include peak shaving, generator synchronization and grid export, subject to utility approval. When paired with generators, the battery system can supply power during periods of peak demand and equipment startup, potentially reducing generator runtime and fuel consumption.

The trailer-mounted design is intended to provide greater mobility than conventional containerized energy storage systems. Features include independent air suspension to reduce vibration during transport, all-terrain tires and ground clearance ranging from 6 to 14 inches.

The system uses LFP battery chemistry rated for more than 8,000 cycles. Standard operating temperatures range from -20 C to 50 C, with an optional cold-weather configuration extending the lower operating limit to -35 C.

Safety features include automatic fire suppression at both the battery and trailer levels. The system lists UL 1973, UN 38.3 and UL 1741 standards and is designed to meet UL 9540A requirements.

LTE-based remote monitoring provides real-time alerts and remote diagnostics. The system also includes a two-year warranty and 24/7 technical support. An optional configuration incorporates electric vehicle charging.

Soneil Spark, based in Brampton, Ontario, will demonstrate the Mobile BESS at RE+ 2026, Nov. 17–19, in Las Vegas.