Renogy BT-2 Bluetooth Module For Solar Products RCM-BT2 User Manual

Renogy BT-2 Bluetooth Module for Solar Products RCM-BT2 Manual

Introduction to the Renogy BT-2 Bluetooth Module

The Renogy BT-2 Bluetooth Module For Solar Products RCM-BT2 adds wireless monitoring and configuration to compatible Renogy solar equipment with an RS485 communication port. After installation, the module connects the equipment to the Renogy DC Home App, allowing users to view operating data and adjust supported settings from a compatible smartphone.

The BT-2 is designed for selected Renogy solar charge controllers, DC-DC battery chargers, inverters, and smart lithium batteries. It uses an RJ45 connection for communication and receives power directly from the connected Renogy device, eliminating the need for a separate power adapter. Its compact housing and 5-meter communication cable make it practical for installations where the monitoring device must be positioned away from the main equipment.

This Bluetooth solar monitoring accessory suits RV owners, boat users, off-grid homeowners, mobile power installers, and technicians who need convenient access to system information. Typical applications include checking battery voltage, reviewing charging activity, monitoring solar performance, and changing supported parameters without opening the equipment enclosure.

Before installation, confirm that the target Renogy product specifically supports the BT-2 and has an RS485 port. The module is not a universal Bluetooth adapter, and compatibility should be verified in the equipment manual.

Renogy BT-2 RCM-BT2 Specifications and Features

• Model: BT-2, model designation RCM-BT2.
• Communication protocol: RS485.
• Connector: RJ45 communication port.
• Input voltage: 5 V or 12 V supplied through the connected Renogy device.
• Communication range: Up to approximately 82 feet or 25 meters under suitable conditions.
• Serial baud rate: Fixed at 9600 bps.
• Standby power consumption: Approximately 0.04 W.
• Operating power consumption: Approximately 0.05 W.
• Cable length: Approximately 16.4 feet or 5 meters.
• Module dimensions: Approximately 2.65 × 1.38 × 0.55 inches or 67.3 × 35 × 14 mm.
• Mounting provision: Approximately 67.3 mm spacing with 3.5 mm mounting holes.
• Operating temperature: Approximately -4°F to 185°F or -20°C to 85°C.
• Protection rating: IP54.
• Companion application: Renogy DC Home App.

Performance can vary with walls, metal enclosures, electrical interference, smartphone placement, and the connected product. Only compatible RS485-equipped Renogy devices should be connected to the RCM-BT2.

How to Set Up the Renogy BT-2 Bluetooth Module

1. Turn off or isolate the connected Renogy equipment according to its product manual. Disconnecting power before inserting the communication cable helps prevent accidental connection problems.
2. Locate the device’s RS485 communication port. Do not insert the BT-2 into an RJ12, USB, Ethernet, or another port unless the equipment manual identifies it as the correct RS485 connection.
3. Insert the BT-2 RJ45 plug firmly into the compatible RS485 port. Connect the other end to the Bluetooth module if the cable is detachable.
4. Restore power to the Renogy device and check that the module indicator operates normally.
5. Enable Bluetooth on the smartphone and install or open the Renogy DC Home App.
6. Use the app’s device-add function, select the compatible product, and follow the on-screen pairing instructions. Keep the phone close to the module during initial connection.
7. After pairing, review system data and change only settings supported by the connected product.

Keep the module dry, avoid mounting it against hot surfaces, and do not modify the cable or enclosure. If the module does not appear, disconnect power, wait about 30 seconds, reconnect the battery-side power first, and then reconnect other system components before trying the app again.

Renogy BT-2 Bluetooth Troubleshooting Guide

Module indicator is off

Confirm that the connected Renogy product is powered and that the RJ45 plug is fully seated in the correct RS485 port. Inspect the cable for cuts, crushed sections, bent contacts, or loose connections. The BT-2 receives power through the communication connection, so it cannot operate when the host device is off.

Bluetooth connection cannot be established

Enable Bluetooth on the phone, stay within approximately 25 meters of the module, and close and reopen the Renogy DC Home App. Remove obstructions and move away from large metal panels or sources of wireless interference. The phone should connect through the app rather than through the phone’s ordinary Bluetooth settings.

Device appears but data is missing

Verify that the selected product matches the physically connected equipment and that the device supports BT-2 communication. A module connected to an unsupported port may power on without providing usable data.

Connection drops repeatedly

Shorten the distance, improve line of sight, secure the cable, and restart the connected device and app. Avoid routing the communication cable alongside high-current wiring where practical.

The RCM-BT2 does not use a universal error-code list; displayed alarms generally originate from the connected Renogy product. Record the product model, app version, indicator behavior, and wiring details before contacting Renogy support. Use the support channel and warranty process provided for the region where the product was purchased.

Pros and Cons of the Renogy BT-2 Bluetooth Module

Advantages

• Convenient wireless monitoring: View supported solar and battery information from a smartphone instead of accessing the equipment directly.
• Remote parameter access: The Renogy DC Home App may allow supported settings to be reviewed or adjusted.
• Long communication cable: The approximately 5-meter cable helps position the module for better access or signal performance.
• Low power demand: Standby and operating consumption are low compared with many permanently connected monitoring accessories.
• Compact installation: The small module is suitable for RV compartments, utility cabinets, and equipment bays.
• Protected enclosure: IP54 protection offers limited resistance to dust and splashing when installed appropriately.

Limitations

• Limited compatibility: It works only with supported Renogy products that provide an RS485 communication port.
• App dependence: Monitoring and configuration require a compatible smartphone and the Renogy DC Home App.
• Bluetooth range constraints: Walls, metal structures, and interference can reduce the practical operating distance.
• No standalone power: The module cannot function independently of the connected Renogy device.
• Not a cloud gateway: The BT-2 provides local Bluetooth access and should not be treated as a substitute for internet-connected remote monitoring.

The Renogy BT-2 is best for users who own compatible Renogy equipment and want straightforward local access to system data. Users needing broad third-party compatibility, cellular access, or cloud-based monitoring may require a different monitoring solution.