Carspa BM150 Battery Monitor, 8-120 V DC, 150 A

The status monitor is an excellent addition to all batteries with an operating voltage of 8 to 120 V, whether lead acid or lithium. It can be used in all photovoltaic power plants with battery storage, in caravans, motor homes, boats and backup systems, in short, wherever you need to know the actual state of charge of the battery at a glance. While most cheaper inverters and charge controllers only estimate the state of charge of the battery based on its voltage, the BM150 status monitor uses a shunt to measure the actual current flow in the battery in both directions, and thus calculates the remaining capacity much more accurately. The beautiful display with green backlight also displays the battery charging or discharging power, voltage, estimated remaining capacity and time to full charge or discharge in real time. The display has adjustable brightness, can be turned off completely, slowly pulses when charging and lights up continuously when discharging, so the user can see the battery activity at a glance without reading the data. A great and universal choice wherever the battery cannot be monitored using a mobile app, or using a phone for monitoring is undesirable.


Product parameters

- working voltage 8 to 120 V DC
- current resistance up to 150 A
- supports all possible types of batteries (lead, lithium, others)
- displays the state of charge in % and Ah, voltage, current, power, and remaining time
- calculates battery status based on current and time, not distorted voltage
- automatic learning
- display with adjustable backlight
- it is possible to install in a panel
- current resistance up to 150 A


Technical parameters

Operating voltage: 8 to 120 V DC
Operating consumption: 12 mA
Standby consumption: 2 mA
Consumption in off state: 2 µA
Voltage measurement accuracy: +- 1.0%
Current measurement accuracy: +- 1.0%
Capacity measurement accuracy: +- 1.0%
Current consumption of backlight: 150 mA
Capacity measurement range: 0.1 to 9999 Ah
Maximum current: 150 A
Operating temperature: -10°C to +60°C
Weight: 270 g
Dimensions: 100 x 61 x 17 mm