MPPT Solar Charge Controller Bluetooth App Control 12V 24V 36V 48V LCD Display Solar Panel Intelligent Regulator with Dual USB Port Timer Setting 40A Item Type: MPPT Solar Charge Controller  Application: MPPT series solar charge controller developed with advanced Maximum Power Point Tracking (MPPT) technology, specially designed for solar panel battery charging systems, with conversion efficiency up to 98%.1. Mobile APP control management, Bluetooth short range control. 2. MPPT solar charge controller, MPPT technology. 3. Charges 12V/24V/36V/48V/60V batteries, automatically identifies charging voltage. 4. Unique battery repair function, able to start with 0V battery. 5. Optimize battery performance with staged charging, high performance built in DSP controller. 6. Over charge protection, input PV polarity reverse protection, output current limiting protection, over temperature protection. 7. Built in overheat, overcurrent, short circuit, open circuit protection, reverse connection protection, controller automatically recovers from faults without damaging equipment. 8. Suitable for sealed acid batteries, gel open batteries, LIFEPO and lithium batteries, etc. 9. Full function parameter setting with buttons, high definition display screen, display charging current, discharge current, temperature, and accumulated power generation on the same screen.