Victron Energy Battery Protect 48V/100A

BPR048100400 - 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.

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BatteryProtect BP-48-100 Specifications

  • Max. continuous load current* 100A 
  • Peak current (during 30 seconds) 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: -40C to +40C (up to 60% of nominal load at 50C) 
  • IP rating Electronics: IP67 (potted) 
  • Connections: IP00 Connection: M8 
  • Weight: 0,8 kg 
  • Dimensions (hxwxd) 62 x 123 x 120 mm


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.


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