The cost of a 50kW battery storage system varies based on components and configurations. Here's a breakdown of estimated costs: Total Estimated Cost: $245,000 – $315,000 Reference: BloombergNEF. “Battery Pack Prices Fall as Market Ramps Up with Market Average at $132/kWh. The cost of a 50 kWh energy storage battery typically ranges between $5,000 and $15,000, depending on several factors including battery technology, installation expenses, and additional features. Lithium-ion batteries tend to be on the higher end of the scale due to their efficiency and. Discover 50 kWh batteries for solar energy storage.