Lead-acid batteries serve as the backup power supply for the site's DC system and require maintenance at a certain charge level. This is to ensure that in the event of a power failure in the high-frequency switch power supply of the DC screen or the AC failure of the silicon rectifier unit, which leads to the inability to output DC power, the batteries can be promptly activated without affecting the normal operation of the site's DC equipment and circuits. Therefore, the batteries' performance must be able to maintain a high level of capacity and voltage for a certain period of time, including during the maintenance of the DC power supply units. Only in this way can the safe and reliable operation of the site's DC system be guaranteed.
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