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The BatteryProtect disconnects the battery from non essential loads before it is completely discharged (which would damage the battery) or before it has insufficient power left to crank the engine.

The BatteryProtect is a uni-directional device. It can only deal with current in one direction, so either current to a load, or current from a charger, but not both currents at the same time. In addition to this, current only can only flow from the Battery terminal to the Load terminal. In case of use with a load, the battery connects to the Battery terminal, and in case of use with a charger, the charger connects to the Battery terminal.

Programming made easy
The BatteryProtect can be set to engage / disengage at several different voltages. The seven segment display will indicate which setting has been chosen.

A special setting for Li-ion batteries
In this mode the Battery Protect can be controlled by the VE.Bus BMS.

Ultra-low current consumption
This is important in case of Li-ion batteries, especially after low voltage shutdown. Please see our Li-ion battery datasheet and the VE.Bus BMS manual for more information.

Over voltage protection
To prevent damage to sensitive loads due to over voltage, the load is disconnected whenever the DC voltage exceeds 64 V.

Ignition proof
No relays but MOSFET switches, and therefore no sparks.

Delayed alarm output
The alarm output is activated if the battery voltage drops below the preset disconnect level during more than 12 seconds. Starting the engine will therefore not activate the alarm. The alarm output is a short circuit proof open collector output to the negative (minus) rail, max. current 50 mA. The alarm output is typically used to activate a buzzer, LED or relay.

Delayed load disconnect and delayed reconnect
The load will be disconnected 90 seconds after the alarm has been activated. If the battery voltage increases again to the connect threshold within this time period (after the engine has been started for example), the load will not be disconnected. The load will be reconnected 30 seconds after the battery voltage has increased to more than the preset reconnect voltage.

BatteryProtect	BP 48-100
Peak current	250A
Operating voltage range	24 – 64V
Current consumption	When on: 2 mA When off or low voltage shutdown: 1,5 mA
Alarm output delay	12 seconds
Maximum load on alarm output	50 mA (short circuit proof)
Load disconnect delay	90 seconds (immediate if triggered by the VE.Bus BMS)
Load reconnect delay	30 seconds
Default thresholds	Disengage: 42V Engage: 48V
Operating temperature range	Full load: -40°C to +40°C (up to 60% of nominal load at 50°C)
IP rating	Electronics: IP67 (potted) Connections: IP00
Weight	0,8 kg 1.8 lbs
Connection	M8
Mounting torque	9 Nm
Dimensions (hxwxd)	62 x 123 x 120 mm 2.5 x 4.9 x 4.8 inch
* The BatteryProtect is not designed for reverse currents from charging sources

BatteryProtect	BP-65	BP-100	BP-220
Max. continuous load current*	65A	100A	220A
Operating voltage range	6 – 35V
Current consumption	When on: 1,5 mA When off or low voltage shutdown: 0,6 mA
Alarm output delay	12 seconds
Maximum load on alarm output	50 mA (short circuit proof)
Load disconnect delay	90 seconds (immediate if triggered by the VE.Bus BMS)
Load reconnect delay	30 seconds
Default thresholds	Disengage: 10,5V or 21V Engage: 12V or 24V
Operating temperature range	Full load: -40°C to +40°C (up to 60% of nominal load at 50°C)
IP rating	Electronics: IP67 (potted) Connections: IP00
Connection	M6	M8	M8
Mounting Torque	5 Nm	9 Nm	9 Nm
Weight	0,2 kg 0.5 lbs	0,5 kg 0.6 lbs	0,8 kg 1.8 lbs
Dimensions (hxwxd)	40 x 48 x 106 mm 1.6 x 1.9 x 4.2 inch	59 x 42 x 115 mm 2.4 x 1.7 x 4.6 inch	62 x 123 x 120 mm 2.5 x 4.9 x 4.8 inch
* The BatteryProtect is not designed for reverse currents from charging sources