4
According to the test, the MPPT controller can raise 20%-30% efficiency compared to the PWM
controller. (Specified value may be fluctuant due to the influence of the circumstance and energy loss.)
Figure 1-2 Maximum Power Point Tracking Technology
In actual application, as shading from cloud, tree, and snow, the panel may appear Multi-MPP. However,
in actuality, there is only one real Maximum Power Point. As the below Figure 1-3 shows:
Figure 1-3 Mutil-MPP Curve
Suppose the program works improperly after appearing Multi-MPP. In that case, the system will not work
on the real max power point, which may waste most solar energy resources and seriously affect the
system's normal operation. The typical MPPT algorithm, designed by our company, can track the real
MPP quickly and accurately. It can improve the PV array's utilization rate and avoid resource waste.
1.5 Battery charging stage
The controller has a three-stage battery charging algorithm, including Bulk Charging, Constant Charging,
and Float Charging. Through the three-stage charging method, the system can extend the battery's
lifespan.
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