Srne ML2440 - Page 7

PWM充电
U(V)
I(A) P(W)
VP曲线
VI曲线
94.5
81.0
67.5
54.0
27.0
40.5
13.5
0.0
19.616.814.011.28.45.62.80.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
MPPT点
Figure 1-2 Solar Panel Output Characteristic Curve
Moreover, different environmental temperatures and light conditions lead to frequent changes of the maximum
power point. Our MPPT solar charge controller can constantly adjust parameters according to different
conditions so as to put the system near the maximum working point all the time.
The whole process is completely automatic without any adjustment by users.
光照降低，电流减小
光照降低，开路电压减小
U(V)
I(A)
Figure 1-3 Solar Panel Output Characteristic and Lighting Relation
Sunlight reduces and current reduces
Sunlight reduces and open circuit voltage reduces
P(W)
I(A)
MPPT Point
PWM Charging
VI Curve
VP Curve