Lead-Acid Solar Batteries are a traditional and cost-effective option for storing solar energy. They use lead plates and an electrolyte solution to store and release power. Although bulkier and heavier than lithium-ion batteries, they remain popular due to their lower upfront cost and proven reliability.
These batteries typically have a shorter lifespan and lower depth of discharge (around 50%) compared to newer technologies, meaning they require more frequent replacements. They also need regular maintenance, especially in flooded types, to ensure proper electrolyte levels and performance.