This is a DIY MPPT charge controller with 60A of charging capability and up to 150VDC input it is a powerful and flexible charge controller ideal for any 12V 24V or 48V battery system. It features an LCD display optional Bluetooth connectivity and it lithium compatible. True Maximum Power Point Tracking MPPT LCD display standard User friendly buttons and prompts Optional Blue Tooth for cell phone connectivity 12/24/36/48V auto detection Lithium compatible Up to 99% efficient 20-30% more efficient than PWM style controllers Over Current Protection allows for more PV than the unit can process Reverse current protection for night prevents batteries from back feeding the solar modules Warning: Product may contain materials cautioned by California Proposition 65