MASE 261H-2H All-in-One BESS

Product Overview

The MASE 261H-2H is a factory pre-assembled all-in-one BESS for commercial and industrial applications. It integrates a 125 kW PCS, a 261 kWh LFP battery system (1P260S, 3.2 V/314 Ah cells) and an EMS in a single floor-standing cabinet with IP55 protection.

The 10 MPPT design supports 45 A per MPPT at 180-920 V operating range with 250 kW recommended PV input. The battery supports up to 0.5P charge rate and 95% DOD. DC-coupled control enables efficient self-consumption and anti-backfeed. Up to 12 units can operate in parallel, expandable to 1.5 MW / 3 MWh.

Key Features

• Factory pre-assembled, integrated installation
• 45 A MPPT current design for high-power modules
• 2x PV oversizing ratio
• DC/AC terminal temperature monitoring
• DC-coupled协同 control for efficient self-consumption
• Built-in EMS, expandable to 1.5 MW / 3 MWh
• Parallel operation of up to 12 units
• 261 kWh LFP battery, 1P260S, 3.2 V/314 Ah cells
• 832 V nominal battery voltage (728-936 V)
• 0.5P charge rate, 95% DOD
• Liquid cooling for battery, air cooling for PCS
• System-level warranty, full life-cycle support
• IP55 protection rating

Technical Specifications

Battery (BAT)

Cell type	LFP 3.2 V / 314 Ah
Battery module configuration	52.24 kWh / 1P52S
Battery system configuration	261 kWh / 1P260S
Battery voltage range	832 V (728-936 V)
Charge / discharge rate	≤0.5P
Depth of discharge (DOD)	95%

DC Input (PV)

Recommended PV input power	250 kW
Start-up voltage	195 V
Maximum DC input voltage	920 V
Rated input voltage	600 V
MPPT voltage range	180-920 V
Number of MPPTs	10
Strings per MPPT	2
Maximum input current per MPPT	45 A
Maximum short-circuit current per MPPT	56.5 A

AC (Grid)

Rated power	125 kW
Maximum apparent power	137.5 kVA
Rated voltage / range	380/400 V, -15% to +10%
Rated frequency / range	50/60 Hz, 45-55 Hz / 55-65 Hz
Maximum current	208.9 A
Power factor (rated)	>0.99
Power factor adjustment range	-1 to +1
Maximum total harmonic distortion	<3%
Grid connection type	3P4W+PE

Protection

DC reverse-polarity protection	Available
Battery reverse-polarity protection	Available
DC input switch	Available
DC surge protection	Type II
Insulation resistance monitoring	Available
AC surge protection	Type II
AC short-circuit protection	Available
Grid monitoring	Available
Anti-islanding protection	Available
Residual current monitoring	Available
String monitoring	Available
PID recovery	Optional
DC arc fault detection (AFCI)	Optional

General Data and Certification

Dimensions (W × H × D)	1600 × 2240 × 1300 mm
Weight	<2450 kg
Operating temperature range	-25 °C to +55 °C (derated above 45 °C)
Relative humidity	5-95% (non-condensing)
Maximum operating altitude	3000 m (derated above 3000 m)
Protection rating	IP55
Maximum parallel units	12
Topology	Transformerless
Cooling	PCS: smart air cooling / BAT: liquid cooling
Communication	LAN / 4G / RS485
Installation	Floor-standing
Warranty	5 years standard, 10 years optional
Certification	NB/T 32004-2018, GB/T 34131-2023, GB/T 36276-2023

Applications

The MASE 261H-2H is designed for commercial and industrial PV-plus-storage projects requiring factory pre-assembly, high MPPT current and scalable capacity.

• Commercial and industrial rooftop PV with storage
• Peak-shaving and demand charge reduction
• Self-consumption optimisation
• Backup power for critical loads
• Multi-unit parallel installations up to 1.5 MW / 3 MWh

OEM & Custom Requirements

Project supply and private-label requirements can be confirmed against the standard MASE 261H-2H platform. Share the required battery configuration and destination market.

• Private-label enclosure and documentation
• Battery interface configuration
• Manual localisation for the target market
• Packaging and delivery planning