A solar battery storage system costs between $10,000 and $20,000. With a 30% tax credit, a 12. What is this? Battery Types: Different battery technologies offer varying benefits; lithium-ion batteries are efficient and long-lasting. . The cost of solar battery storage depends on several factors, like the system's size, capacity, and brand. With so many options available, it can feel overwhelming to figure out what fits your budget and energy needs. As of 2025, prices range from $0. 86 per watt-hour (Wh) for utility-scale. .