Product Card

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.
12/24V auto ranging
The BatteryProtect automatically detects system voltage
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 BatteryProtect can be controlled by the VE.Bus BMS.
Note: the BatteryProtect can also be used as a charge interrupter in between a battery charger and a Li-ion
battery. See connection diagram in the manual.
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 16V respectively 32V.
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-65 BP-100 BP-220
Maximum continuous load current 65A 100A 220A
Peak current (during 30 seconds) 250A 600A 600A
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
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
BatteryProtect 65A/100A/220A
With 7-segment LED display: easy to set up
Connector with preassembled DC
minus cable (included)
BatteryProtect BP-65
BatteryProtect BP-100
BatteryProtect BP-220