Maximum Power Point Tracking (MPPT) is an advanced charging technology that enables the 
solar panel to output more power by adjusting the electric module's operating status. Due to the 
nonlinearity of solar arrays, there exists a maximum energy output point (maximum power point) 
on their curves. Unable to continuously lock onto this point to charge the battery, conventional 
controllers (employing switching and PWM charging technologies) can't get the most of power 
from the solar panel. But a solar charge controller featuring MPPT technology can continuously 
track arrays' maximum power point so as to get the maximum amount of power to charge battery 
Take a 12V system as an example.As the solar panel's peak voltage (Vpp) is approximately 17V 
while the battery's voltage is around 12V,when charging with a conventional charge controller,the 
solar panel's voltage will stay at around 12V,failing to deliver the maximum power. However,the 
MPPT controller can overcome the problem by adjusting the solar panel's input voltage and curre 
nt in real time, realizing a maximum input power.Compared with conventional PWM controllers, 
the MPPT controller can make the most of the solar panel's max. power and therefore provide 
larger charging current. Generally speaking, the latter can raise the energy utilization ratio by 

15% to 20% in contrast with the former.