Seplos MASON 280L (30Y) 314Ah Rechargeable Battery

SEPLOS Mason 280L (3.0Y) 314 Ah — 16 kWh Industrial-Grade Battery with 2A Active Balancing

The SEPLOS Mason 280L (3.0Y) 314Ah is a high-capacity 51.2 V LiFePO4 battery designed for energy storage systems (ESS), hybrid, and off-grid inverters. Built on a 1P16S configuration (16 cells of 3.2 V, 314 Ah) and equipped with an intelligent Smart BMS with an advanced protection system. Suitable for residential, commercial, server rooms, and telecom hubs where voltage stability, high current, and long lifespan are critical.

Design and Architecture

• Core: Lithium iron phosphate (LiFePO4) cells, 3.2 V, 314 Ah, arranged in 16S1P.

• Nominal battery voltage: 51.2 V, operating range: 42–58.4 V.

• Nominal energy: 16.076 kWh, enough to cover a significant portion of daily residential consumption.

• Enclosure: 280L form factor, designed for floor or wall mounting indoors (IP20). Includes ventilation gaps for heat dissipation.

• Weight: 118 kg, indicating full-size high-capacity cells.

Intelligent Smart BMS — Cell-Level Control

The BMS manages:

• Voltage measurement of 16 cells (accuracy ±20 mV)

• Temperature monitoring (cell, ambient, and MOSFET sensors, ±2 °C)

• State of charge (SOC) tracking

• Charge/discharge cycle counting

• Logging up to 500 fault events

• Operating modes and current limit management

Protection features:

• Cell overvoltage (typical 3.65 V)

• Deep discharge protection (2.7 V per cell)

• Battery voltage limits (57.6 V / 41.6 V)

• Cell overtemperature protection (up to 55 °C)

• MOSFET overtemperature protection (up to 100 °C)

• Short-circuit protection

• Overcurrent protection (up to 210 A, temporary up to 300 A/30 ms)

Programmable thresholds and delay timers are supported.

2A Active Balancing — Key Advantage

Unlike passive systems, SEPLOS uses active balancing with up to 2 A.
Operation principle:

• Redistributes energy between cells

• Balances during charge, discharge, and standby

• Starts at 50 mV voltage difference, stops at 30 mV

• Can operate continuously for up to 24 hours

This is critical for high-capacity 314 Ah batteries, where passive balancing is inefficient. Active balancing prolongs battery lifespan and reduces degradation.

Electrical Parameters

• Nominal capacity: 314 Ah

• Nominal energy: 16.076 kWh

• Recommended charge/discharge current: 157 A

• Maximum charge current: 200 A

• Maximum recommended discharge current: 157 A

• Short-term current: up to 300 A (30 ms)

• Lifespan: up to 8000 cycles at 70% SOH

• High cycle durability makes it suitable for daily use in solar systems.

Temperature Ranges

• Charge: 0…+40 °C

• Discharge: −20…+40 °C

• Storage: −10…+35 °C

• Built-in low-temperature charging protection

• Heating function activates at 0 °C when connected to a charger

Communication and Integration

• Supported protocols:

  • CAN (500 Kbit/s) — primary inverter interface

  • RS485 (19200 bps) — monitoring and parallel operation

• Supports parallel connection of up to 16 batteries (mixing models/brands not allowed)

• CAN interface enables integration with PCS, scaling systems up to hundreds of kWh.

Operating Modes

• Charge mode (MOSFET automatically engages if charger voltage exceeds 0.5 V)

• Discharge mode

• Standby mode

• Sleep mode

• Automatic wake-up

• LED indicators: RUN, ALARM, SOC (4 levels)

Dimensions and Installation

• Size: 817 × 412 × 267 mm

• Weight: 118 ±3 kg

• Installation: vertical, on concrete or non-combustible surface

• Recommended spacing: 50 cm for heat dissipation

SEPLOS Mason 280L (3.0Y) 314Ah is an advanced 51.2 V LiFePO4 battery with 2A active balancing, comprehensive protection, and industrial-grade BMS. Ideal for building scalable energy storage systems requiring high current and long service life.