2. Introduction
2.1. Description
Victron Energy Lithium NG batteries are Lithium Iron Phosphate (LiFePO4 or LFP) batteries available in various capacities with nominal voltages of 12.8V, 25.6V, and 51.2V. They can be connected in series, parallel, or series/parallel so that a battery bank can be built for system voltages of 12V, 24V, or 48V. The maximum number of batteries in one system is 50, which results in a maximum energy storage of 192kWh in a 12V system and up to 384kWh in a 24V and 48V system.
This is the safest of the mainstream lithium battery types and is the battery chemistry of choice for very demanding applications.
Important
Note that this draft manual serves as a preliminary guide to facilitate planning and preparation for the launch of the NG series batteries and associated NG Battery Management System (BMS) devices. The 24/200 Ah battery variant availability is scheduled for May 2024, with the remaining battery models slated for availability in August/September 2024.
2.2. Features
Integrated cell balancing, temperature and voltage control system
The battery has an integrated balancing, temperature and voltage control system (BTV) that must be connected to an external battery management system (BMS). The BTV monitors each individual battery cell, balances the cell voltages and generates an alarm signal in case of high or low cell voltage or in case of high or low cell temperature. The BMS (must be purchased separately; see the The BMS models chapter for an overview of available BMS models and functionality) receives this alarm signal, which then switches off the loads and/or chargers accordingly.
Integrated shunt
The battery data (battery voltage, current and temperature) are transmitted to the BMS and evaluated there, i.e. to calculate the state of charge, which can then be read out via VictronConnect or a GX communication centre, or to create and issue specific warnings and alarms.
Automatic setup, monitoring and control via VictronConnect or a GX device and the VRM Portal
The BMS automatically manages all battery parameters. It detects the system voltage and the number of batteries in parallel, series, and series/parallel connections. The BMS (from now on Lynx Smart BMS NG 500 A/1000 A, further models to follow) is mandatory and must be purchased separately.
Monitoring and control take place via VictronConnect (every BMS model has Bluetooth), a GX communication centre or the VRM Portal. You can view battery parameters such as cell status, voltages, battery current and temperature in real-time. The BMS also automatically updates the battery firmware. Please see the Monitoring & Control chapter for details.
To learn more about the VictronConnect app and its functions, please refer to the VictronConnect manual, which can be downloaded from the product page.
Easy bracket mounting
Mounting brackets make the installation easier and ensure that the battery is optimally secured against slipping and tipping over. Optionally, the batteries can also be secured with straps.
Increased ingress protection (IP-rating)
The Lithium NG batteries are effectively sealed against dust and can withstand low-pressure water jets, making them suitable for environments where exposure to dust and water is a concern.
Low self-discharge rate
The self-discharge rate has been significantly improved and is now a maximum of 3 % of the battery capacity per month. A low self-discharge rate contributes to the overall performance, longevity, and reliability of the NG batteries.
Other features
High round-trip efficiency
High energy density - More capacity with less weight and volume
High charge and discharge currents, enabling fast charging and discharging