Translations:Lead acid battery/41/en

It is important that batteries reach a full state of charge (90-100%) on a regular basis. If batteries do not reach a full state of charge every few days, then the plates within the battery will begin a process of sulfation which is the buildup of sulfate crystals on the plates of the battery that will start to impede performance and can ultimately lead the battery to cease functioning. Although a 30% depth of discharge is rather shallow for off-grid systems, if a battery regularly sits at 70% state of charge (the inverse of a 30% DoD) the batteries will begin to sulfate, lose performance, and fail prematurely.