V-TAC VT-51201-B 5.12kWh modular battery5.12kWh 51.2V LiFePO4 module, wall/floor/rack, black

Overview

The VT-51201-B (V-TAC SKU 12327) is the black version of V-TAC's modular 5.12kWh, 51.2V lithium iron phosphate battery. The 440×540×133mm, 44kg housing goes on the wall, stacks on the floor or slides into a 19-inch cabinet. It delivers 100A continuous and 200A for ten seconds, sets its own address in parallel banks and holds a CEI 0-21 certificate with Deye SG05LP1 inverters, which makes it a straightforward choice for Italian single-phase LV hybrid systems.

• 5.12kWh, 51.2V, 100Ah LiFePO4 module
• 100A continuous, 200A peak for 10 seconds
• Auto-addressing, no DIP switches
• Up to 64 units in parallel (327kWh)
• Wall, floor-stacked or 19-inch rack mounting
• CEI 0-21 certified with Deye SG05LP1 inverters

How it works

The VT-51201 is a 1P16S lithium iron phosphate pack with 51.2V nominal, a 44.8–57.6V operating window and 100Ah, or 5.12kWh. It supports 1C charge and discharge, 100A continuous and 200A for ten seconds, and V-TAC recommends 90% depth of discharge. A built-in circuit breaker and the BMS protect the pack, and five LEDs show state of charge while three more show run, alarm and protection status.

Modules network themselves automatically, so no DIP switches have to be set, and the BMS firmware can be monitored and upgraded remotely. An external power supply can wake the battery, preventing it from staying in a suspended state. The housing comes in white (VT-51201-W) or black (VT-51201-B), with identical electrical data.

Installation

One housing serves three installation styles: on the wall with two brackets and M6×100 expansion bolts, stacked on the floor, or in a 19-inch cabinet at least 600mm deep. The enclosure is IP20 for dry indoor rooms, at up to 2,000m altitude, with charging from 0°C and discharging from -20°C up to +55°C. The PCS port talks to the inverter by CAN at 500kbit/s or RS485 at 9600 baud, and IN/OUT ports chain the batteries; V-TAC specifies power cables of at least 25mm² (4AWG).

Scaling and compatibility

Up to 32 modules can be paralleled directly, and up to 64 (327kWh) with an external CAN-Box. Kiwa has certified the VT-51201-W and VT-51201-B to CEI 0-21 as storage system with Deye SG05LP1 single-phase LV hybrid inverters, including the SUN-6K-SG05LP1-EU-AM2-P. For that 6kW inverter V-TAC suggests three modules for about two hours of backup, four for three hours and five for four hours.

Questions and answers