Quick Summary Independent Australian testing (the ITP Renewables Battery Test Centre, funded by ARENA) found large, real differences in how home batteries degrade, some failed early, others held up well. Expert Tip: The Battery Test Centre’s full reports are publicly available through ARENA’s knowledge bank. High temperatures are one of the biggest accelerators of solar battery degradation, especially relevant in Australian conditions. High temperatures are one of the biggest accelerators of solar battery degradation, especially relevant in Australian conditions. LFP chemistry generally offers longer cycle life and better heat tolerance than older NMC, but independent testing showed a poorly made LFP battery can still degrade faster than a well-made battery of another chemistry.