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。

youdao

The sun is at its lowest in our sky because the North Pole of our tilted planet is pointing away from it.

这一天太阳位于天空的最低点，因为地球倾斜的北极与它最远。

youdao

When the device is aligned so that its pits are pointing straight at the sun, most of the incident radiation goes down them to their bottoms.

ECONOMIST: Solar power