L520-Omini-M7 Optim 125/522-EU-04-C3-ESS-025C

The Pylontech OPTIM US L520-OMNI-4H is an all-in-one outdoor battery energy storage cabinet rated 522 kWh with an integrated 125 kW PCS, giving a four-hour discharge duration at 0.25C — a long-duration configuration intended for commercial and industrial peak shaving, self-consumption optimisation, electricity arbitrage, demand response, ancillary services and backup supply. Storage is built on LFP 314 Ah cells assembled into HM7A200L modules of 52,25 kWh (166.4 V, 314 Ah, 345 kg each), forming a DC bus with a nominal voltage of 832 V and an operating window of 728–936 V. On the AC side the cabinet delivers 125 kW at 400 V, 3P4W, 50 Hz, tolerating a grid voltage range of −10% to +15% with a power factor range of ±1, and provides the same 125 kW off-grid with 100% three-phase unbalance capability for unbalanced backup loads. Round-trip efficiency is 90%. Thermal management combines liquid cooling on the battery side with fan cooling on the PCS, supporting an operating range of −25 °C to +50 °C (derating above 45 °C), 0–95% RH and altitudes up to 3000 m (derating above 2000 m). The enclosure is rated IP54 with C3 anti-corrosion as standard (C5 optional) and integrated aerosol fire extinguishing. Communication is via CAN, RS485, Ethernet or 4G using Modbus TCP/RTU. Certified to IEC61000, IEC62477, IEC62619, IEC62109, EN50549, VDE4110 and G99. Dimensions 1900 × 1350 × 2480 mm (W×H×D), weight under 5,5 t.