Technical FAQs 4

How long do solar batteries last?

For solar batteries, this figure is normally around 60% of its storage capacity after 10 years, or whenever the first conditions of the warranty are met. Most solar batteries come with a 10-year warranty, which is an indication as to how long you should expect them to last.

What happens when a solar battery reaches its useful life?

A solar battery reaches its useful life when it fails to meet its nominated percentage of storage capacity eg. 60%. The battery will continue to degrade, and it may be able function at lower percentages, but it is deemed to have reached its useful life. Solar batteries degrade far more, and faster, than solar panels do.

How long does a battery last?

Lead-acid batteries (flooded or sealed): These are the most traditional type and also the shortest-lived, typically lasting 3 to 7 years. They’re more affordable upfront but require regular maintenance and don’t hold up as well over time. When people talk about battery lifespan, they’re often referring to “cycle life.”

When do solar battery warranties expire?

Solar battery warranties typically expire when the first of three conditions are met: A solar battery’s warrantied life is the number of years the manufacturer guarantees the performance of the battery, typically it is set at 10 years from the date of installation.

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