E&J BM21 Battery Monitor | LCD, Bluetooth & 500A Shunt

See your battery status on a separate display Add an easy-to-read LCD battery display to your caravan, 4WD or off-grid setup. The E&J BM21 uses a 500A shunt to measure charge and discharge current, with Bluetooth access through the Smart Battery Monitor app. It is a useful optional upgrade when you want a fixed display, including on ATG lithium batteries that already provide Bluetooth monitoring. Key features Displays battery state of charge, voltage, current and capacity Measures energy flowing into and out of the battery through the shunt LCD display and Bluetooth monitoring Suitable for compatible LiFePO4, lithium and lead-acid battery systems What’s included BM21 LCD battery monitor 500A current shunt 5m display cable InstallationInstall and configure the shunt and monitor according to the supplied instructions. Main battery/shunt connection leads are sold separately and must match the terminal sizes and circuit current. The monitor does not replace your battery’s BMS or circuit protection. Shop ATG lithium batteries · Ask about installation compatibility