Check the listing for details. Renogy Empowered BT-2 Bluetooth Module Controller for Smart Home. Condition: New, Made in China. Listed at 30.00 USD. The Renogy Empowered BT-2 Bluetooth Module Controller compatible with the rover elite mppt series is a smart home accessory designed for the RJ45 communication ethernet style port. off-grid solar power systems. With its sleek design and Bluetooth 4.2 connectivity through app, signal range is up to 82ft. this solar charge controller allows users to monitor and control their solar power setup remotely. The device is powered by solar source and offers a convenient way to manage charging modes and system configurations with ease. Ideal for those looking to enhance their home improvement projects with alternative energy supplies, the Renogy BT-2 is a reliable and efficient tool for achieving energy independence.