WV Grid-Tie Series
4
point, then achieve a stable output purposes.
MPPT is for short of "Maximum Power Point Tracking". It means the controller can sense the voltage of the
solar panels on time, and can track the highest voltage and current (VI).Then made the inverter discharge to
power grid with the highest efficiency.
The peak voltage (Vpp) of the solar panels is about 19.5V when it in factory. And the environment
temperature is
25 ° C. The reason of setting this temperature(interestingly, different from the subjective
imagination, we ordinary people the conclusion may let us surprised) is that when the weather is very
hot, solar panels’ peak voltage will fall to about 17.5 V while in cold weather, the peak voltage can
achieve 20.8 V.
Now we back to contrast the difference of MPPT solar energy grid inverter and traditional inverter.
The traditional solar inverter is a bit like the manual gearbox. When the engine speed increase, while
the gearbox gear don't increase at the same time, it will definitely affect the speed of the car. For
traditional inverter speaking, the parameter output power is been set in factory. It likes a car have been
fixed set on fixed 1 gears, no matter how powerfully you trample accelerator, the speed of a car is
limited. While have the MPPT function it will be different, it is automatically. It will automatically adjust
the gears according to the engine
’ speed, so it can make cars in the most gears in a reasonable
efficiency standard operation. It means the MPPT controller can track the maximum power point of solar
panels in real-time then express the biggest efficiency of solar panels. The higher the voltage, the more
power can be output through the MPPT. Thus improve the charging efficiency. Theoretically speaking,
using MPPT, the efficiency can be increased by 50% compared with the traditional inverter. But due to
environmental impact and various around energy loss, the ultimate efficiency can improve 20%-30%
according to our actual testing.
