This Standard sets out recommended practices for the installation, maintenance, testing and replacement of secondary batteries, having nominal voltages not exceeding 115 V d.c., for use with stand-alone systems.Stand-alone systems are systems that are not connected to the power distribution systems of an electricity supply authority. Stand-alone systems are supplied with power from one of a number of sources: a photovoltaic array, a wind generator, a water generator, or a diesel generator.This Standard applies to the installation of all types of batteries including lead-acid and nickel-cadmium and covers both vented and valve-regulated cells.NOTE: AS 3011.1 and AS 3011.2 cover requirements for batteries having nominal voltages exceeding 115 V d.c.