The lifespan of a solar battery varies depending on the type of battery, environmental factors and usage, but solar batteries typically last between 5-15 years. Since this is shorter than the typical 25- to 30-year lifespan of solar roof tiles, a solar battery will likely need to be replaced during the life of a renewable energy system.
Solar batteries are rechargeable batteries, but on a larger scale than you might be used to. Like any rechargeable battery (think about your mobile phone, tablet or laptop computer), the battery life will begin to dwindle after a few years, and you’ll find that it needs to be recharged increasingly often.
If you want to get the most out of your solar battery storage, the first thing to consider is the type of battery. For example, lithium-ion batteries, such as the residential solar battery that Marley offers, typically last 10-15 years, and sometimes longer. Lead-acid batteries often cost less but may only last five to seven years.
A solar battery's longevity is also influenced by how often it cycles – that is, charges and discharges. Frequent use, overcharging or allowing the battery to completely discharge can shorten its life. If the battery is subjected to extreme temperatures, it may also impact its useful life, so installing it in a suitably protected location is essential.