太阳能电池板采用脉宽调制（PWM）控制的MPPT跟踪，由于太阳能电池板的电压高于5V，通过降压变换器将直流母线电压维持在5V。
The solar panel is applied with the MPPT tracking using PWM control and the Dc bus voltage is maintained at 5V through a buck converter as the solar panel used is of higher voltage than 5V.
系统还配备了蓄电池组，蓄电池通过双向变换器（同步降压器）直接与直流母线连接，当直流母线中具有更多电压时，电池将进行充电。
A battery storage is also equipped with the system and the battery is directly connected to the Dc bus through a bidirectional converter (synchronous buck converter) and the battery will charge when there is more voltage in the DC bus.
如果太阳能不可用，那么直流母线电压由电池提供。
If the Solar power is not available then the Dc bus voltage is provided by the battery.
尽管太阳能面板最重要，但如果有良好的辐照，并且光伏面板能够向直流母线提供足够的能量，那么电池将处于空闲状态（既不放电也不充电）。
Although the primary importance given to the soalr panel, if there is good irradiation and the pv panel can provide enough energy to the DC bus then the battery will be in a idle state (neither discharging nor charging).
源码下载地址：
http://page2.dfpan.com/fs/4l9cbjc24251f209169/
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