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12v uninterruptible power system
不间断电源（或稱UPS，即 Uninterruptible Power Supply）是在电网异常（如停电、欠压、干扰或浪湧（湧浪電流））的情况下不间断的为设备提供后备电源，维持电器正常运作的设备。通常情况下不间断电源被用于维持（尤其是）或等关键性商用设备或精密仪器的不间断运行，防止计算机数据丢失，电话通信网络中断或仪器失去控制。
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Pure solar photovoltaics
Sunlight is the most abundant, safe and clean energy source for sustainably powering economic growth. One of the most efficient and practical ways to harness sunlight as an en. . Despite the fact that the bandgap is a fundamental material property, there remains considerable ambiguity over how to determine the bandgap and which methods for dete. . Owing to thermodynamic factors (equation 2), at temperatures >0 K, it is not possible to convert all the energy associated with a separated electron–hole pair into usable free energy, eve. . A plot of the maximum \({J}_{{\rm{SC}}}^{{\rm{SQ}}}\) versus \({E}_{{\rm{g}}}^{{\rm{PV}}}\) is shown in Fig. 2a. The experimental photocurrents at short circuit and.
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