Dual Battery Dash Gauge - Voltage Monitoring/Alarm, Current and Temperature

Monitor your vehicle’s Dual Battery System with a Dual Battery Gauge displaying voltage, current and ambient temperature for each battery. 

Low and high voltage alarm levels (visual and audible) can be set separately for each battery.

Why do you need a dual battery gauge to display battery voltages, currents and temperatures?

Every dual battery system needs a Dual Battery Gauge to monitor and display;

• Voltage at the terminals of each battery.
• Current flowing in to (charging) and out of (discharging) for each battery.
• Ambient temperature of each battery

Why is the battery terminal voltage important?

The voltage of a lead-acid battery indicates the level of charge in the battery.  As shown on the following table, discharging a battery below 40% is likely to reduce the life of the battery and it may not fully recover. Other battery technologies (eg lithium) also have recommended charge/discharge limits.

Why is monitoring current into and out of the battery important?

While the engine and alternator are running, the current flows show whether your main and reserve batteries are charging or discharging. When the vehicle is not running, the current flow shows how much current is being drawn from each battery by accessories such as fridges and lights.

Why is battery ambient temperature important?

Good quality  batteries perform reliably when exposed to extreme environments and have a wide operating temperature, ranging from -20°c to 50°c (-4°F - 120°F). However, battery capacity and/or battery life is reduced at the extreme temperatures.

More information can be found here:

Battery Gauge VEBD-01 Installation Notes

Battery Gauge VEBD-01 Manual