What kind of solar battery you need for your solar electric system?
By watching video below you will discover:
- basics of solar batteries and their application in solar power systems
- the most important battery features,
- what kinds of batteries are used in solar power systems
- how to connect them and what to avoid to have an efficient and healthy solar battery bank
Solar batteries are devices capable to produce and store DC electricity.
Batteries are commonly used in solar electric systems as substitute of solar panels at night or during cloudy days. In such situations the needed electricity is drawn from batteries instead from the solar array which cannot act as a generator due to insufficient sunlight.
Battery, however, is not an indispensable part of a photovoltaic system.
When a solar electric system is connected to the utility grid, it typically does not contain batteries unless a power backup is needed for certain special electric devices. Most solar systems disconnected from the grid contain batteries, along with charge controllers – devices who manage battery charging and discharging. In a solar electric system batteries are usually combined in a battery bank to get the desired voltage and capacity.
A battery is made of cells which can be either wet or dry ones.
Wet cell batteries are more common than dry cells due to their high performance, cost efficiency and reliability.
Their drawbacks, however, are low mobility and need for regular maintenance, as well as for a separate room. Such drawbacks are eliminated by dry cell batteries which are more expensive and have shorter lifecycle.
No matter what kind of battery is used, solar battery cost makes a substantial part of the cost of any solar system.
As a rule, cost of the battery bank is 25% and 50% of total system cost. It is very important if not to be able to choose the right battery bank for your solar system, to be able to evaluate what you are offered by a solar system vendor.
A battery with less capacity than needed will not be able to meet your daily energy needs and the whole solar system gets pointless. A battery of capacity greater than needed will not only cost much higher, but will also degrade severely the performance of your system.
Moreover, such a battery will cost you much more in view of regular maintenance and, last but not least, is tougher to get recycled.
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