SHANDONG LANTIAN ENERGY TECHNOLOGY CO., LTD.
PRODUCT SELECTION REFERENCE

125 kW / 261 kWh Fully Liquid-Cooled Storage Cabinet
Technical reference: HESS-261-2h; global datasheet V202504
Reviewed: 2026-10-15

Nominal battery energy: 261 kWh
Cell rating / chemistry: 3.2 V / 314 Ah LFP
Battery pack configuration: 1P52S / 52.25 kWh
System battery configuration: 1P260S
Battery voltage range: 728–936 V DC
Rated on-grid output: 125 kW at 50 °C
Maximum output power: 137.5 kW
Rated grid voltage range: 340–440 V AC
Grid frequency: 50 / 60 Hz
Grid connection: 3P3W / 3P4W
Thermal management: Fully liquid-cooled battery and PCS
Dimensions (W × H × D): 1,030 × 2,450 × 1,400 mm
Weight: Less than 2,700 kg
Ingress protection: IP55
Operating temperature: −30 to +55 °C; derating above 50 °C
Communication interfaces: RS485 / Ethernet / DIO

Technical source: https://www.hoymiles.com/downloads/datasheet-hoyultra2-hess-261-2h-global-en.html

Model-specific notes: Values follow the official V202504 datasheet linked by the manufacturer. Newer regional revisions may differ, particularly fire protection and compliance; these fields are not promised here. Rated output is 125 kW at 50 °C, not a blanket output guarantee at every temperature. Backup requires the engineered transfer and protection arrangement. Official product render edited to remove branding only.
Image reference: HESS-261-2h official supplier product render; final site equipment follows the selected regional configuration.

These are published supplier-reference values. Confirm the selected-model datasheet, rated conditions, compatibility, availability, certification, warranty and delivery scope in the final quotation.

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