Want to check your solar system stats from your phone? This Bluetooth Adapter BT-1 from Solarepic lets you wirelessly monitor your SR-ML MPPT solar controller. It’s brand new, unused, and comes in retail-ready packaging (might be in a plain box if shipped direct from the factory). This little module pairs with the controller via Bluetooth and shows data like charging status, battery voltage, and power output on your smartphone. Perfect for off-grid setups, battery-based systems, or just keeping an eye on your home/garden solar power. It works indoors or outdoors and offers tons of protection features: overcharge, overcurrent, low voltage, lightning, discharge, and more. The adapter itself is black, compact, and runs on DC power. Setup is straightforward—plug it in, sync via Bluetooth, and you’re good to go. No fancy tools needed. Great for DIY solar enthusiasts or anyone who wants real-time system monitoring without running extra wires. Compatible with SR-ML series MPPT controllers. Made in China, reliable, and super handy for remote monitoring. Just make sure your controller supports the BT-1 before buying. Makes solar management way easier!