InSight Series 24V & 48V Fuel Gauge

InSight Series 24V & 48V Fuel Gauge

The InSight Series 24V & 48V Fuel Gauge helps you determine when it's time to charge your batteries. It’s a low current draw (29 milliamps), constantly backlit battery gauge that will show the state of charge for up to 14 InSight batteries connected in parallel.



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The fuel gauge receives real-time current data from all parallel connected battery CANs and calculates the remaining amp hours as a percentage from 0-100%.

The fuel gauge will display several messages throughout its operation cycle:

  • Number of batteries detected
  • State of Charge (SOC) as a percentage from 0-100%
  • A “LOBATT” message will display when the battery bank is below 20% SOC
  • A “LOBATT” message will flash when the battery bank is below 10% SOC




Operating Current 29 milliamps
Operating Temperature 14°F to 185°F (-10°C to 85°C)
Storage Temperatures -40°F to 185°F (-40°C to 85°C)
Ingress Protection Rating IP67
Part # BI-3140R-2448


Paul W.

I purchased two Relion Insight 48V batteries and did not think I needed the Fuel Gauge. I was wrong! Knowing how much power is left is so much better than trying to use the SOC leds. I highly recommend the Fuel Gauge.

Lance E.

I have two InSight 48V batteries and a Lester Summit 2 charger (OB). With the addition of the InSight Fuel Gauge, I now feel like I have a complete system because I know when I need to charge (much less frequently than I was prior to the fuel gauge). I highly recommend RELiON products!

We’ve installed over 20 of the InSight Series Fuel Gauges and have been very impressed with the ease of installation and the accuracy of SOC. Its intelligent design being tied directly into the battery management system is definitely an advantage. Our customers like having a meter that reflects an accurate state of charge so they don't get caught short of power when they are away from home.

RELiON InSight Series Fuel Gauge Installation

See how the InSight Series® Fuel Gauge is easy to install and use.

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