Featured in Phoenix rising – 03-2013

Some live longer

Comparison of life spans: How long a battery lasts when used for a certain photovoltaic application depends on the circumstances. The manufacturers specifications are derived under favorable laboratory conditions. Thus in practice such values may often vary. Ulrich Ehmes explains how such information can be evaluated.

By

Mirco Sieg

01 Mar 2013

pv magazine: How can the life span of a battery be assessed? Ulrich Ehmes: There are two important characteristic values for the life span of batteries: the cycle life and the calendrical life span. The cycle life indicates the number of charging and discharging operations after which the capacity of the battery is reduced to …

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