The Victron Battery-Protect BP-220 (MPN BPR122022000) disconnects the battery from the less important loads before it is completely discharged (which would damage it) or before it no longer has sufficient energy to start the engine etc.. In addition, the BP series has overvoltage protection, which switches off the load at 16V or 32V battery voltage and protects it from damage. The BP supports AGM, lead-acid, gel and lithium batteries.

6 different switch-off thresholds can be set
The Battery Protect is very flexible and can be set to different cut-off voltages. The following cut-off thresholds can be activated on the device: 10.5V / 21V, 10V / 20V, 9.5V / 19V, 11.25V / 22.5V, 11.5V / 23V, 11.8V 23.6V

In addition, there are different switch-on thresholds that can be selected for most switch-off thresholds. This makes this device the perfect protective device for your battery and thus ensures maximum service life, as most voltage converters or charge regulators have undervoltage protection, but this only intervenes at fairly low values, which are usually in the range of 10.5V / 21V. The higher this switch-off threshold is, the longer you will be able to enjoy your batteries, which are generally quite cost-intensive.

Selecting the cut-off threshold

Depending on the battery type, different minimum battery voltages apply which must be adhered to in order not to damage the battery. For AGM/gel batteries, we recommend setting the Batteryprotect to 11.5V switch-off threshold. For lithium batteries (LifePo4), 12.0V cut-off threshold is recommended. Depending on the intended use of the battery, it may be necessary to change these limits. The manufacturers also provide different specifications for their batteries. Therefore, always ask the battery manufacturer which cut-off threshold is the right one for your battery!

Essential product features summarized
For 12V and 24V batteries with automatic detection of the voltage range of the battery bank
6 different cut-off voltages selectable
220A maximum continuous current
Simple programming and status display of settings via seven-segment display
Extra mode for lithium batteries - in this mode, the BP can be controlled by the VE.Bus BMS
Very low power consumption
Explosion protection through integrated MOSFET switches that replace the relays and thus reduce the risk of sparking to zero
Integrated alarm output
Output for delayed alarm

The alarm output is activated when the battery voltage falls below the preset value for shutdown for more than 12 seconds. Switching on the motor therefore does not activate the alarm. The alarm output is a short-circuit protected open collector output connected to the negative (minus) rail. Max. Current 50 mA. The alarm output is normally used to activate an audible signal, an LED or a relay.

Load disconnection and reconnection delay

The load is switched off 90 seconds after the alarm is activated. If the battery voltage rises again to the threshold value for connection within this period (after the motor has been started, for example), the load is not switched off. The load is reconnected 30 seconds after the battery voltage has exceeded the specified voltage value for reconnection.

Scope of delivery:
1x Victron BPR122022000 BP-220 Battery protection 220A 12V 24V
1x operating instructions