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For Leaves Limited, founded in 2012, specialized in production of PV module. Now mostly focuses on the customized solar panel, like semi flexible, ETFE panel and other special type & materials solar panel. Meanwhile, offer the complete solution of dc charging system.

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PV Battery - Photovoltaic System Component
Source: Solar Direct | Author:For Leaves Ltd | Publish time: 2015-08-02 | 4246 Views | Share:

For example, running a 60-watt lightbulb for one hour uses 60 watt-hours. If a 12-volt battery is running the light it will consume 5 amp-hours (60 watt-hours divided by 12 volts equals 5 amp-hours)

How big a battery do I need for a PV System?

Ideally, a battery bank should be sized to be able to store power for 5 days of autonomy during cloudy weather. If the battery bank is smaller than 3 day capacity, it is going to cycle deeply on a regular basis and the battery will have a shorter life. System size, individual needs and expectations will determine the best battery size for your system.

Please contact us and our engineers and consultants will be happy to assist you.

Battery Cycles

Batteries are rated according to their "cycles". Batteries can have shallow cycles between 10% to 15% of the battery's total capacity, or deep cycles up to 50% to 80%. Shallow-cycle batteries, as those for starting a car, are designed to deliver several hundred amperes for a few seconds, then the alternator takes over and the battery is quickly recharged. Deep-cycle batteries or the other hand, deliver a few amperes for hundreds of hours between charges. These two types of batteries are designed for different applications and should not be interchanged. Deep-cycle batteries are capable of many repeated deep cycles and are best suited for PV power systems.