Energy Storage Systems (BESS) – VRLA Batteries
VRLA batteries were first invented way back in 1934 with the modern VRLA battery invented in 1957. Since then they have been widely used in a range of uses, particularly Uninterruptible Power Supplies for power protection. With regards to Energy Storage Systems, there are a many that use VRLA batteries due to their cost and availability.
VRLA batteries have the following Pros and Cons for Energy Storage:
- Virtually maintenance free
- Cost effective
- Well documented / known performance of battery technology
- Inability to fully discharge (100%) without affecting long term battery capacity
- Degradation if not kept at optimum temperature
- Limited number of discharge cycles during typical lifetime
VRLA Battery Developments
Many manufacturers are developing new and improved versions, better suited to Energy Storage Systems. For example, the Ultrabattery is a VRLA hybrid comprising both standard VRLA architecture as well as an ultracapacitor. This produces a battery that can handle significantly more partial discharge cycles than traditional VRLA batteries.
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