Household solar energy storage system is typically powered by lithium-ion batteries, allowing homeowners to store excess electricity generated by solar panels for later use. These systems promote energy independence by reducing reliance on the grid, slashing electricity bills through efficient energy management, and providing backup power during outages. They contribute to environmental sustainability by maximizing clean, renewable energy. While the upfront costs can be high, they can provide long-term savings and support the transition to cleaner, more sustainable residential energy solutions.