Lynx Smart BMS & Lithium NG – Firmware v1.16: improved SoC sync, smarter ATC/ATD and important bug fixes

Victron Energy releases firmware v1.16 for Lynx Smart BMS NG and Lithium NG batteries – with better SoC accuracy, corrected temperature display and more reliable ATC/ATD management for all system sizes.

On 28 January 2026, Victron Energy released firmware v1.16 for the Lynx Smart BMS NG and Lithium NG series. The new update includes several important improvements for those using Victron lithium systems – most notably around State of Charge (SoC), temperature display and more intelligent handling of ATC/ATD limits.

Below we go over what's new, what's fixed, and why this update is well worth installing.

Improved SoC synchronisation – more accurate charge status in all modes

SoC synchronisation has long been a central part of how a Victron battery system optimises charging, operation and lifespan. In v1.16, Victron has:

• improved how SoC syncs when power quickly switches between charging and discharging
• made the algorithm more stable with fluctuating loads
• reduced the risk of incorrect SoC jumps

The result: A more reliable and consistent SoC display – especially for those with larger load variations, for example during inverter operation or solar production.

Corrected temperature display at sub-zero temperatures

In NG models, the battery temperature was sometimes displayed incorrectly when the cells were below 0°C.
This was a pure display bug – the battery protection system was working normally the whole time.

In v1.16:

• correct battery temperature is displayed even at sub-zero temperatures
• temperature alarm and protection work exactly as before

An important quality upgrade for those who use their system year-round or in colder climates.

Smarter ATC/ATD limits – scales with battery bank size

Previously, Victron used a fixed limit for ATC/ATD (Allowed To Charge / Allowed To Discharge) errors.
It wasn't always optimal, especially for larger installations.

With firmware v1.16:

• ATC/ATD limits automatically adjust to total battery capacity
• higher currents are accepted in larger systems
• the risk of unnecessary ATC/ATD errors is significantly reduced

This is a really good improvement for those of you with multiple parallel-connected lithium batteries.

Extended timeout – fewer unnecessary interruptions

The timeout before an ATC/ATD error is triggered has been increased to 60 seconds.

This means:

• chargers and loads get more time to stabilise
• fewer false alarms
• more stable operation in systems with varying currents

A small but very effective bit of fine-tuning from Victron.

Full change log

The complete changelog is available as usual in the Victron Professional firmware library.

How to install the update

You can install firmware v1.16 in several ways:

Via Victron Professional

• Download the firmware file directly
• Also available in the linked Dropbox folder

Via VRM Portal

• Update the system completely remotely if you have remote access enabled

Via VictronConnect

• Download the file from Victron Professional
• Add it manually to the app
• Update your device via Bluetooth or USB

Summary – why you should update to v1.16

Firmware v1.16 is a recommended update for all users of:

• Lynx Smart BMS NG
• Lithium NG batteries

You get:

✔ more accurate SoC display
✔ accurate temperature display at sub-zero temperatures
✔ fewer false ATC/ATD errors
✔ more predictable operation in larger battery banks
✔ better overall stability of the entire system

In short – a small update that has a big impact.