Victron energy BMV 501 - battery monitor: The monitor allows you to keep track of important battery data, such as battery voltage, current flow, power consumption, and state of charge. It can be used to monitor a wide range of battery types, including lead-acid, AGM, gel, and lithium-ion batteries.

The BMV-501 is easy to install and use. It comes with a detailed installation guide and all the necessary hardware, including a 500A/50mV current shunt, two inline fuse holders, and crimp terminals. Once installed, the BMV-501 can be connected to a computer or smartphone via Bluetooth or a USB cable. This allows you to view real-time data on your device and to download historical data for analysis.