C&I Energy Storage System | Commercial & Industrial ESS Solutions

Rising electricity tariffs, unstable grid supply, and growing pressure to meet sustainability targets are reshaping how commercial and industrial operators manage energy. A well-designed C&I energy storage system addresses all three challenges simultaneously — cutting peak demand charges, capturing surplus solar generation, and ensuring power continuity when the grid fails.We supply turnkey C&I energy storage solutions ranging from 143kWh DC-coupled on-grid systems to 932kWh containerized BESS units, covering factories, commercial buildings, remote microgrids, and critical infrastructure across global markets.

What Business Problems Does C&I Energy Storage Solve?

① Peak Demand Charge ReductionFor most industrial electricity users, demand charges — billed on the peak power draw recorded during any 15–30 minute window in the billing period — account for 30–50% of the total electricity bill. A C&I ESS charges during off-peak periods and automatically discharges during peak demand windows, directly flattening the demand curve and cutting the monthly bill. A single well-sized system typically delivers a payback period of 3–6 years in markets with significant demand tariffs.Suitable solutions: SigenStack (on-grid), POWER CESS US Series

② Solar Self-Consumption MaximisationOn-grid commercial solar systems without storage routinely export 40–60% of generated electricity to the grid at low feed-in rates, while still purchasing expensive peak-period power from the utility. Adding energy storage captures that surplus generation for on-site use during evenings and peak-price windows — improving project IRR without increasing panel count.Suitable solutions: SigenStack (DC-coupled, highest round-trip efficiency)

③ Backup Power & Business ContinuityGrid outages — whether from utility faults, extreme weather, or grid instability in developing markets — can halt production, damage sensitive equipment, and create significant financial and safety risks. C&I energy storage provides seamless switchover to battery backup, with response times measured in milliseconds, maintaining power to critical loads until the grid is restored or a generator takes over.Suitable solutions: SigenStack, FlexCube, POWER CESS US Series

④ Off-Grid & Microgrid Power SupplyFor remote industrial sites where grid connection is unavailable or uneconomical — mining operations, agricultural facilities, construction sites, island communities, telecom towers — a self-contained microgrid combining PV, battery storage, and diesel generator provides reliable, fuel-efficient power that can be centrally monitored and managed.Suitable solutions: SigenStack (microgrid mode), FlexCube Micro-Grid Hybrid ESS

⑤ EV Charging Infrastructure SupportHigh-power EV charging creates sudden, large demand spikes that many commercial sites cannot support without expensive transformer upgrades. Integrating energy storage as a buffer allows EV charging to be deployed at locations with limited grid capacity — charging the battery during low-demand periods and dispatching stored energy to the chargers on demand.Suitable solutions: FlexCube (PV-storage-charging integrated topology)

Our C&I Energy Storage Solution Portfolio