Safiery Solid State Lithium 48V 53.1Ah 2,712Wh – 3C 7,500W48V 53Ah semi-solid-state LiFePO4 battery, 150A BMS, IP67

Overview

The 3C version of the Safiery Solid State Lithium 48V battery (type 48V53AH3C) is the high-power member of the range: a 51.2V, 53Ah pack with a BMS rated 150A continuous, or 7,500W, and 180A for 2 seconds, in an IP67 case. Safiery positions it for demanding loads such as electric boat propulsion. Charging is limited to 50A at 57.6V. CAN connects it to Victron GX devices, RS485 chains parallel packs, and the type is covered by Intertek's IEC 62619 CB report and an EU declaration of conformity.

• Semi-solid-state cells rated 10,000 cycles at 80% DOD
• One stackable 420mm case for every voltage
• CAN BMS read by Victron GX devices
• Up to 40 batteries in parallel via RS485
• 48V packs tested to IEC 62619 by Intertek
• 5-year warranty

How it works

Safiery Solid State Lithium batteries use semi-solid-state wafer cells in which a ceramic electrolyte replaces most of the liquid of a conventional lithium-ion cell; Safiery states that only 3–5% liquid remains as a wetting agent. The cells are rated for at least 10,000 cycles at 80% depth of discharge, and the manufacturer reports nail-penetration, 200kN crush, 130°C heat and 60-minute short-circuit tests without a thermal event.

Each battery has its own BMS with over-charge, over-discharge, over-current, over-temperature and short-circuit protection plus cell balancing. Banks are built in parallel only, never in series. One battery acts as master and talks to the system over CAN, while the others are chained to it with RS485 cables from OUT to IN. Pressing Reset/On on the master starts the whole string; a flashing red LED signals a fault or a loose data cable.

Key features

All versions share an ABS case 420mm long and about 250mm high that stacks and locks into the next battery. The 12V model stores 217Ah and delivers 200A continuously, 250A for 2 seconds; the 24V model is rated 100A continuous. The 48V packs (51.2V, 53Ah) are offered with a 2C BMS rated 100A and Bluetooth, or a 3C BMS rated 150A for high loads such as electric propulsion.

For charging from shore or generator power, Safiery lists 48V on-board chargers of 25A and 40A with CAN, an IP67 housing and 110V or 240V AC input.

Installation and compatibility

Batteries are joined side by side or in a stack with tin-plated flexible copper straps of 50mm² cross-section rated 250A, so the bank load through the straps must stay within 250A: about 3,000W at 12V, 6,250W at 24V and 12.5kW at 48V according to the manual. Check polarity before connecting, and keep the protective caps on unused data sockets, otherwise the warranty is void.

The CAN port uses standard isolated NMEA-type cabling without power and has a built-in 120Ω termination resistor. On a Victron Cerbo GX it connects to VE.Can set to 250kbit/s; a Victron blue CAN terminator may be needed if the battery is the only other CAN device. A volt-free contact across pins 7 and 8 of the master's IN socket switches the bank on and off remotely.

Monitoring and settings

Through the CAN BMS, a Victron GX device shows state of charge, voltage, current and temperature together with minimum and maximum cell voltages and temperatures, and receives the charge voltage and current limits that steer the chargers. Versions with the Bluetooth option can also be read with the Safiery Solid State app for Android and iOS. For storage over three months Safiery recommends about 50% state of charge, checked every six months.

Questions and answers