MPPT solar charge controller with timer and battery type selection Key Features 1)MPPT with conversion efficiency up to 99% under charging mode. 2)12V/24V/48V system auto recognize. 3)Controller with Intelligent design and free lifelong online upgrade service. 4)LCD and LED show parameters and system information,like PV input voltage,battery voltage. 5)With intelligent design,the device can be upgraded online lifelong. 6)Nominal maximum solar/PV input is DC 150V . 7)Three Stages Charge mode: fast charge, constant charge, floating charge. 8) With high efficient MPPT operation scheme and adopting TI28035 chip. 9) Support kinds of batteries:Gel,Sealed lead acid,vented,NiCd,etc. 10)Extensible LAN remote control. 11)With CE, ROHS, FCC, PSE certifications. 12)7 languages. 13)2 years warranty