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Solar Battery Energy Storage

Battery storage is often used as a back-up power supply for energy security, to ensure continued operations during a power cut, and can offer a range of other benefits such as micro-grids, where a new or upgraded incoming supply is cost prohibitive, to support EV infrastructure, for peak rate cost reduction and for grid balancing services.


There are many types of Battery Energy Storage with different chemistries and ratings that are suitable for different applications. These can be charged from excess solar generation or overnight from off-peak, cheap rate grid electricity.


To give you an idea, the main types are;


Flow batteries. These rely on a liquid electrolyte and discharge times are only restricted by the size of the electrolyte storage tanks. Flow batteries are more expensive to install but will have a long life and are ideal for situations where a long discharge time and limited power output is required.


Lead acid batteries. A solution that’s been around a long time and a tried and trusted technology that still has many uses. Lead acid batteries, much like you would find in conventional motor vehicles, are cheaper but heavier and less energy dense than modern alternatives.


Lithium-ion batteries. The new favourite for many applications and benefitting from large improvements in cycle life and energy density. Lithium-ion batteries are usually the technology of choice for peak shaving/load shifting and for generating revenue from grid services such as frequency response and capacity market contracts.


Batteries are available as part of a solar power purchase agreement or as a capital purchase. To realise the potential return on investment, it’s important to design flexibility into your battery system.


What battery solution is right for you? FlexiSolar can assist in defining your storage requirements and, with selected technology partners, can design energy storage architecture with the associated battery management systems and smart grid solutions that will meet your specific needs.


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