Renogy Battery Voltage Sensor with M8 Ring Terminals

The Renogy Battery Voltage Sensor (BVS) is a 16.4 ft (5 m) accessory cable that delivers a more accurate voltage reading from the battery terminals directly to a compatible Renogy charge controller or DC-DC MPPT charger, allowing the controller to regulate charging stages more precisely. It supports 12V, 24V, 36V, and 48V battery banks and works with lead-acid (Flooded, Sealed, and Gel) and lithium iron phosphate chemistries.

Accurate Voltage Where It Counts

In systems with long wire runs between the charge controller and the battery bank, voltage drop along the cable can cause the controller to read a higher voltage than what actually exists at the battery terminals. When the controller acts on that inflated reading, it may exit bulk or absorption charging too early, leaving the battery undercharged over time. The Battery Voltage Sensor connects directly to the battery terminals and sends the true terminal voltage back to the controller, so charging stage transitions happen at the right moment rather than based on an inaccurate measurement at the controller's own terminals.

Works Across Multiple Controllers and Battery Types

The Battery Voltage Sensor is compatible with several Renogy MPPT and PWM charge controllers: the Rover 60A/100A (via the "Battery Sampling" port), the Rover Boost 10A and Rover Elite 20A/40A (via the "BATT" port), and the Adventurer Li 30A (via the "Batt Remote" port). It also works with Renogy 30A and 50A DC-DC MPPT battery chargers via the "BVS" port. Battery compatibility spans 12V, 24V, 36V, and 48V banks, including all Renogy Lithium 12V/48V, AGM 12V, and GEL 12V batteries, as well as flooded and sealed lead-acid types.

Three-Step Installation

Installing the Battery Voltage Sensor does not require special tools. First, connect the red wire to the positive pin and the black wire to the negative pin of the green terminal block, tightening the screws with a screwdriver. Second, attach the two M8 ring terminals to the battery: red to positive, black to negative. Third, plug the green terminal block into the appropriate BVS port on the charge controller or charger. Connection can be verified with a multimeter reading at the terminal block screws.

Features

• Accurate terminal voltage: reads voltage directly at the battery bank, not at the controller's terminals
• 16.4 ft (5 m) cable: accommodates installations where the controller and battery bank are separated by a long wire run
• M8 ring terminals: approx. 5/16" ring terminals for a secure battery connection
• Multi-voltage support: compatible with 12V, 24V, 36V, and 48V battery banks
• Multi-chemistry support: works with lead-acid (Flooded, Sealed, Gel) and lithium iron phosphate batteries
• Plug-and-play connector: green terminal block plugs directly into the compatible port on supported Renogy controllers and chargers

Specifications

Who This Is For and Isn't

The Renogy Battery Voltage Sensor suits off-grid builders (overlanders, van converters, RV owners, and cabin installers) who are running one of the compatible Renogy MPPT or PWM charge controllers or DC-DC MPPT chargers and whose wire run between the controller and battery bank is long enough to introduce a meaningful voltage difference between the two points.

The Battery Voltage Sensor is not compatible with Renogy charge controllers or chargers that do not have a dedicated BVS, Battery Sampling, BATT, or Batt Remote port. It is not a standalone charging device and does not function without a compatible controller or charger.

Common Questions

Why would a solar system need a battery voltage sensor?

In systems with long wire runs, the voltage measured at the charge controller's own terminals can be higher than the actual voltage at the battery terminals due to resistance in the cable. The Renogy Battery Voltage Sensor connects directly to the battery bank and sends the true terminal voltage to the controller, so the controller transitions between charging stages at the correct voltage rather than acting on an inaccurate reading.

Which Renogy charge controllers and chargers are compatible with this sensor?

The Battery Voltage Sensor works with the Renogy Rover 60A/100A (connect to the "Battery Sampling" port), Rover Boost 10A and Rover Elite 20A/40A (connect to the "BATT" port), Adventurer Li 30A (connect to the "Batt Remote" port), and the 30A/50A DC-DC MPPT battery charger (connect to the "BVS" port).

Does the Battery Voltage Sensor work with the Adventurer Li 30A charge controller?

Yes. The Renogy Battery Voltage Sensor is compatible with the Adventurer Li 30A PWM charge controller. The correct connection port on that controller is labeled "Batt Remote."

How long is the cable, and what size are the ring terminals?

The Renogy Battery Voltage Sensor cable is 16.4 ft (5 m) long. The ring terminals are M8, approximately 5/16 inch. Red connects to positive and black to negative.

What battery voltages and chemistries does this sensor support?

The Renogy Battery Voltage Sensor supports 12V, 24V, 36V, and 48V battery banks. Compatible battery chemistries include lead-acid (Flooded, Sealed, and Gel) and lithium iron phosphate, including all Renogy Lithium 12V/48V, AGM 12V, and GEL 12V batteries.