

POWEROAD’s latest FLEX-261 AIO series ESS is rated for a capacity of up to 261 kWh and a power output of 125 kW, making it suitable for C&I use cases
Its AC-coupled configuration allows integration with a C&I user’s existing PV capacity
The company claims that it can maintain cell-to-cell operational temperature delta within 3°C
Chinese energy storage system (ESS) maker POWEROAD Renewable EnergyCo., Ltd. highlighted its FLEX-261 AIO series product at the SOLARTECH INDONESIA 2026 event in Jakarta, Indonesia. Aimed at the country’s commercial & industrial (C&I) consumers, with or without PV capacity, the company says this ESS is designed to optimize OpEx, ensure energy stability, and maximize PV self-consumption.
It combines a vertically stacked battery unit, safety features, a liquid-cooling mechanism, a battery management system (BMS), and a power conversion system (PCS) in a single enclosure. The PCS acts as an intermediary bidirectional (rectifier/ inverter) conversion stage, resulting in an AC-coupled configuration with an existing or new PV installation.
Once the system architecture is chosen, system performance will be the priority for a user. To this end, this ESS, equipped with 314 Ah Lithium-iron phosphate (LFP) cell-based battery units, is rated for a capacity (charging/discharging) of up to 261 kWh. Its corresponding 3-phase full-load power is 125 kW. However, since its C-rate hasn’t been disclosed, its rated backup duration can’t be determined at this time.
During operation, its BMS automatically monitors and controls the charging and discharging of the connected battery units in line with dynamic user loads. This real-time balancing, along with a circulating coolant across the battery periphery, optimizes thermal losses. It results in a cell-to-cell operational temperature delta within 3°C, POWEROAD claims.
In addition to ensuring operational efficiency and guaranteed battery lifespan, the ESS features safety functions across multiple conversion stages. Thermal runaway, a critical yet common failure mode that often leads to fire generation, is particularly addressed during the design phase. The ESS automatically activates its aerosol-based fire suppression function upon detecting an ignition via its sensors. In case this first line of defense fails, its vents open, releasing the excessive buildup of pressure and preventing a potential explosion.
To utilize costly C&I spaces with a user-friendly installation, it has dimensions(W × D ×H) of 1,080 × 1,450 × 2,235 mm, resulting in a compact footprint of 1.49 m². Its single enclosure-based design also reduces wiring and installation complexities, helping installers with a fast turnaround time
The showcased product’s country-specific commercialization details were unknown at the time of this article’s publication.