EVMS Lite V2


The EVMS Lite is a simplified version of our EVMS Core, for those who only require basic functionality:

BMS master control: Communicates with BMS modules over CAN bus and takes action if any cells go out of safe voltage or temperature range.
Contactor control: Manages auxiliary contactors to allow pack break-up when not charging or driving.
Charge/drive interlock: Prevents the vehicle from being driven while charging, and vice versa.
Output for remote buzzer and status LED, to warn the driver if any cells have gone out of range.
New in Vesion 2: Current, power and battery state of charge calculation via optional current shunt.

The EVMS Lite is compatible with our EVMS Monitor, allowing viewing of various information such as pack voltage, current, power, state of charge, auxiliary battery voltage and BMS information.

Stationary Applications: The EVMS settings now allows you to switch to Stationary Mode, for battery backup and off-grid applications. In this mode, the Key input enables both Main Contactor and Charge Enable outputs concurrently. An undervoltage cell will disable the Main Contactor output (to remove any loads on the battery) and an overvoltage cell will disable the Charge Enable output (to disable any charging sources). In both cases the outputs are re-enabled once the voltage has recovered by 0.4V (i.e there is ±0.2V hysteresis around the configured thresholds). The Auxiliary Contactor output will come on if SoC drops below the programmed threshold, for either remote alarms or enabling other charging sources (such as generators).

Should I get the EVMS Core or EVMS Lite? Both the EVMS Lite and Core provide BMS functionality, contactor control, charge/drive interlock, aux (12V) battery voltage, traction battery voltage, current and state of charge (optional for EVMS Lite), and CAN bus interface for BMS modules and EVMS Monitor. The EVMS Core supports the following additional features:

Dedicated traction voltage measurement terminals
HV to chassis isolation monitoring
Optional precharger (12-160V or 160-320V rated)
Hall effect current sensor instead of current shunt
Temperature sensor (e.g motor or coolant temp)
Gauge outputs: fuel, temp, tachometer
Contactor auxiliary switch monitoring
Peukert’s Effect compensation (for PbA batteries)
Die cast, IP65 weatherproof housing

Note: If operating the Lite without a Monitor, we will need to pre-program the device with information about BMS cell counts and types. We will contact you to discuss if this is the case.

New for 2017: CAN bus integration with TC Chargers. The EVMS can now communicate with CAN-enabled TC Chargers to control charger operation over CAN bus for BMS protection, viewing/adjusting current and voltage, and charger status feedback. Please contact us in advance if you wish to use a CAN-enabled TC Charger with an EVMS, as it involved a CAN baud rate change and we will need to review your charger's CAN protocol to confirm compatibility.

Related Products

EVMS Monitor V2   $145.00
View information from an EVMS, BMS modules and ZEVA motor controller over CAN bus

12-cell Lithium BMS Module   $145.00
Automotive grade, CAN bus-enabled battery management and balancing for up to 12 cells per module.

Shielded Twisted Pair cable   $4.50
Ideal for reliable, low-noise CAN bus wiring. Sold by the metre.

CAN communication cable   $12.00
Pre-made CAN cables in lengths to order


- Power supply: 13.5V nominal (8-20V max)
Current consumption: 5mA idle, 25mA running
Contactor outputs rated at up to 5A
Dual CAN bus ports (5-pin Molex KK)
Optional current shunt: 100A, 200A or 500A 75mV
Dimensions: 104x62x12mm
Weight: 50g

Datasheets & Manuals:



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