Recent pricing trends show standard industrial systems (1-2MWh) starting at $330,000 and large-scale systems (3-6MWh) from $600,000, with volume discounts available for enterprise orders. The cost of battery energy storage has continued on its trajectory downwards and now stands at US$150 per megawatt-hour for battery storage with four hours" discharge duration, making it. How much does a small battery energy storage cabinet cost? 1. Understanding the Cost of a Small Battery. The 1 MW Battery Storage Cost ranges between $600,000 and $900,000, determined by factors like battery technology, installation requirements, and market conditions. 2 US$ * 2000,000 Wh = 400,000 US$.