Translations:Lead acid battery/3/en

Just like how a PV module is comprised of various different PV cells connected together in series that each produce a certain voltage, lead acid batteries are composed of series connected cells with each one producing around being having a nominal voltage of roughly 2 V. This means that a 12 V battery will consist of 6 cells.

There are many different types of lead acid batteries, but they can initially be divided into two categories: starter batteries and deep-cycle batteries.

• Starter batteries are used in cars and are intended to provide large amounts of power for short periods of time with a shallow depth of discharge. They work well for this purpose, but they are unable to continuously supply power beyond a shallow depth of discharge without severely shortening their cycle life. These batteries will fail prematurely in a PV system and are not worth investing in.
• Deep-cycle batteries have a more robust design that enables them to continuously supply high amounts of power to a deeper depth of discharge - generally considered to be around 80%. These batteries are heavier and cost more than starter batteries but are the appropriate battery for use with a PV system.