This 30kW all-in-one commercial & industrial BESS system integrates lithium battery storage, inverter, and intelligent energy management into a compact unit. It helps businesses store solar energy, reduce peak electricity costs, and ensure stable power supply. Battery Storage Add-On: Adding a 30kW battery storage system (e. Savings with Incentives: Federal tax credits (30% in 2023) and state rebates can reduce costs by 40–50%. How Many Batteries Are. The ESS 30KW 30KWH Energy Storage System delivers a powerful, scalable solution for businesses requiring reliable backup power. Cables are provided from the host battery module to the inverter at a customer determined length.