The cost of battery energy storage cabinets can vary widely based on several factors, including battery chemistry and system capacity. On average, a small residential system may range from $5,000 to $15,000, while larger commercial systems can climb to $50,000 or more. Designed for use in a climate controlled environment, it regulates temperature and provides active smoke monitoring with an alarm system. 6 System can hold up to six PHI-3. 8-M Batteries to expand your system to a total of 22. 6 Cabinet is NEMA 3R-rated. .