BT-1 Bluetooth Module (New Version)

Works great... just what I needed. High quality, easy install. Phone interface is very good, too.

UPDATE: I'm giving their customer support a much improved 4-star score. Customer support worked to help resolve my issues in a timely and thoughtul manner. Unfortunately the BT-1 is ONLY compatable with Renogy products - which I did not see in any of the advertiements, promotions or YouTubes. Renology is processing a return for me. I'm withholding 1-star because the industry and Renogy could improve their cross-system integration and work to simplify solar systems for everyday-Joe's. I would recommend their products and support.

The bluetooth Module works, however the new Core Bluetooth display needs a direct line to read the charge controller. The bluetooth is not pairing while the Core display is on.