Charge indicator: Yes. Fast charging red light long bright red and blue lights flash alternately . Full automatic stop.MPPT function: a. MPPT maximum power point automatic , to maximize the full use of solar charging mppt voltage: adjustable, MPPT solar modules in different voltage is different, even mppt voltage can not tune mppt solar controller, can be called mppt it? MPPT control technology using charge sheet charging efficiency ratio control scheme in general or a DC-DC step-down power MCU + PWM lift about 30%. Make full use of solar energy, and low-power operation. Reduce power loss! MPPT function can effectively prevent the solar panels so that the charging voltage is the battery slow slow death. Low pressure: 1V (as is -down voltage regulator, the input voltage is at least higher than the output 1V) Low power consumption: Yes! Ultra-low pressure designed to achieve low power consumption and high efficiency, professional adaptation of solar panels Charging: automatic intelligent three-stage charging mode. Self- solar power charge current automatically adjust the size. parameters: The modular nature: a real MPPT solar maximum power point , automatic intelligent charge management, low power consumption Input voltage: DC 8-28V input DC voltage. ( AC input) Output voltage: DC 5-26V stepless mission For lower output voltage, please contact the owner. 6V battery can be either 12 or 8.4V, 12.6V, 16.8V lithium battery 7.2V, 10.8V, 14.4V lithium iron phosphate battery 2-4 string lithium batteries, lithium iron phosphate charge management board Operating temperature: Industrial grade (-40 to +85℃) Load regulation: ±1% Voltage regulation: ±0.5% Conversion efficiency: Max: 93% : 95% for different lighting conditions vary. No-load current: 3MA even weak morning sunlight can sily start automatically, eliminating manual switch. np