There should be a reliable electricity supply and emergency lighting. When necessary, a stand-by power supply should be available for the support of important equipment.

有可靠的电力供应和应急照明。必要时，重要设备如培养箱、生物安全柜、冰箱等应设备用电源。

youdao

Other possible plans include rewarding firms for maintaining stand-by capacity to supply power to the grid in an emergency, and preventing the construction of new coal stations that do not have some way of capturing and storing their planet-heating emissions.

ECONOMIST: Britain can have clean energy or cheap energy, but not both