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How often do UPS batteries need replacing?

Most small single phase UPS with a standard 5 year design life valve regulated lead acid (VRLA battery will require a battery replacement around years 3-4 of operation. This assumes that the batteries are operated within an 20-25˚C ambient temperature range. Long runtimes and larger single single and three phase UPS systems using 10 year design life VRLA batteries will require replacement around years 7-8 of operation.



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