Battery Watch BW 801e

Battery Watch with electronic relay, extreme low power consumption for 12 V and 24 V on-board supply systems.


  • Undervoltage and overvoltage protection
  • Low self power consumption
  • Audible and visual alarm


  • Product number: 1305041043
  • Unit price: 110.00 EUR

In the chosen option // plus VAT // plus shipping

Product description

The BW 801e battery monitor can be used in both 12 V and 24 V vehicle power circuits. The self-consumption is 6 mA in normal operating mode,in idle mode it is < 3 mA.
The alarm thresholds are set by DIP switch, which allows the BW 801e to be used with all battery types. A high current carrying capacity of 70 A and the solid M6 bolts allow even strong consumers to be switched off without an intermediate relay. Thanks to an integrated hysteresis, short-term voltage dips or peaks, which can occur when switching powerful loads, do not result in false tripping. The BW 801e also has an alarm output and a connection option for an additional switch. This makes it possible to use it as a  remote-controlled battery master switch.

Technical Information

Continuous load
50 A
Nominal voltage
12 V/24 V
Operating temperature
-35 °C ... +55 °C
Overload (10 s)
70 A
6 mA
Switch-off voltage (12 V)
9 V ... 12 V
Switch-off voltage (24 V)
18 V ... 24 V
Dimensions (L x W x H)
100 x 90 x 25 mm
0.11 kg