Some PV systems are designed to provide power to loads even when the sun is not shining, and these typically use battery storage.
即使不出太阳，一些光伏（PV）系统也能够为负载提供动力，这些系统通常使用蓄电池。
Some PV arrays use tracking systems to keep the panels pointing at the Sun, but these are expensive and need maintenance.
有的光伏阵列使用跟踪系统让太阳电池板一直指向太阳。但是这些系统价格昂贵还需要维护。
These kinds of PV generating systems are the best power supply solutions applied to meet the electricity needs for the equipments and devices in soilders' daily lives and actions in those areas.
能够满足边防哨所、营区生活用电和办公设施供电，保证了装备的正常使用和日常生活供电。
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