The solar regulator is only suitable for lead-acid batteries: OPEN, AGM, GEL. It is also suitable for Ni-MH, Li-ion or other batteries. There are many kinds of MPPT technology,Our Solar Controller Mppt technology is to detect the maximum charging current,not the boost type or the automatic charging of the solar panel voltage. Compared with normal solar charge controller, this MPPT controller could increase efficiency by 10%-30%. When the battery voltage is low, the controller will automatically cut off the load from the system. If the voltage of battery is back to normal and the load will restart working. This MPPT controller has perfect SOC function, control charge current, and supply power to the loads.Prevent the battery from over-charging , over-discharging and reverse charging to solar panels during nights. Q:My solar panel is 36V 200W,can I charge 12V battery? A:To charge a 12V battery,the working voltage of the solar panel can be between 17V and 23V(Voc),and for a 24V battery,the working voltage of the solar panel can be between 36V and 46V.(Voc) Please make sure that the working voltage of the power supply and solar panels are within this range. If it is too high, the controller will be damaged.