What we do

Battery management systems

At T1 Lithium, we install a complete battery monitoring, management and protection system featuring three levels of battery control.

We keep our control system outside the battery, visible for you to see.  You can see the voltage of each cell and the voltage of the whole battery.  If there should be an unacceptable voltage difference between the highest cell and the lowest cell, we provide the tool and the instructions to fix this.  In a closed system, this is not possible and it is the most common downfall of any battery, but particularly lithium.

An unbalanced battery is not particularly common, but it's not rare enough for us to hide the capacity to fix this simple issue away from you.  We believe you should be able to easily check the state of your battery and easily fix an imbalance.

We have our preferred components for our battery management system, borne out of years of testing.  When installing in a new van, which we do quite often, we'll use the components below.  But if you already have a solar regulator, battery monitor or inverter, we'll use yours where possible.  Click here to see the equipment we've successfully incorporated into a reto-fit system


We use the Plasmatronics™ Dingo * solar regulator to control any size of solar array as well as integrate mains and DC to DC charging with their own control systems.

* We can use the Plasmatronics Dingo 2020N™ or your existing solar regulator.


The T1 Lithium Control Box looks after the battery cells by monitoring the cell voltages and interrupting charging for a set period, then resetting and watching for another cell over voltage.  This protects the battery even if you aren’t there.


The T1 Lithium Control Box, via the Victron™ BMV700*, monitors the state of charge , minimum battery voltage and maximum battery voltage, and disconnects the battery if any of these parameters are exceeded, but not before sounding an alarm at 20% state of charge (SOC).  The control box turns off the system at 5%.  These alarm parameters at 20% and 5% are adjustable to our customers' needs.

This battery disconnect does not occur until after the alarms have been ignored. This will most often be the case when no one was there to hear the alarm.

*We can use the Victron™ BMV 700 or 712 battery monitor, or we can use your existing battery monitor.


This enables the last 5% of battery capacity to be used in an emergency but is mainly used to activate the system to allow recharging if the lower limit of SOC or voltage has been exceeded.

I once bought my kids a set of batteries for Christmas with a note on it saying, toys not included. - Bernard Manning