How long do solar batteries last?
By My Energy Mate Editorial · Last updated
Quick Answer
Modern LFP home batteries last 10-15 years of daily cycling. Warranties guarantee 60-70% of original capacity after 10 years or a set energy throughput, whichever comes first. Chemistry, heat exposure and cycling depth determine which limit you hit.
Almost every battery sold in Australia in 2026 uses lithium iron phosphate (LFP), which tolerates daily full cycles far better than the NMC chemistry common five years ago.
Heat is the main killer: a battery on a west-facing wall in Brisbane degrades measurably faster than the same unit in a garage. Installation location is a warranty-relevant decision.
Read the throughput clause in the warranty: a '10-year' warranty capped at 3.65 MWh per usable kWh is one full cycle per day; heavy VPP trading can consume it early.
Go deeper: Home Batteries comparison table or the cost guide.