The global commercial and industrial (C&I) energy storage market is expanding rapidly as businesses seek to manage electricity costs, integrate renewable energy, improve power resilience, and address grid-capacity constraints. This growth has attracted many battery energy storage system (BESS) suppliers, making manufacturer selection increasingly complex.

This article outlines the key criteria for evaluating a C&I energy storage manufacturer and explains why WHES is regarded as a leading manufacturer based on these criteria. Read on to learn more.

What Defines a Leading C&I Energy Storage Manufacturer?

Shipment volume and project scale provide an initial indication of market acceptance. A manufacturer with systems operating across multiple countries and industries has experience adapting equipment and controls to different load profiles, tariffs, grid conditions, and application requirements.

Technology is another important measure. C&I storage requires more than battery cabinets. A capable manufacturer must coordinate the battery management system, power conversion system, energy management system, thermal management, safety mechanisms, and cloud-based monitoring. Continued product iteration is equally important because grid codes, market rules, and customer requirements continue to evolve.

Global delivery must be supported by localized service. Regional offices, technical teams, spare-parts warehouses, and local data infrastructure can reduce project risk and improve response efficiency. Manufacturers also need relevant safety certifications and grid-compliance qualifications, such as UL, IEC, CE, and market-specific connection requirements.

Finally, leadership extends beyond commissioning. Battery health assessment, preventive maintenance, fault response, spare-parts support, warranty management, and system upgrades can materially influence availability and total cost of ownership throughout a project’s operating life.

WHES Holds a Leading Position in the Global C&I Energy Storage Market

WHES is a leading provider of digital and intelligent commercial and industrial (C&I) energy storage solutions. Its capabilities across the five evaluation areas support its position in the global C&I energy storage market.

1.Shipment Volume and Project Scale

According to Frost & Sullivan, in 2025 and among approximately 900 Chinese C&I lithium-battery energy storage system integrators, we ranked sixth in terms of the global shipment volume of C&I energy storage systems with a market share of 2.4% and third in terms of the shipment volume of C&I energy storage systems in the overseas markets with a market share of 2.9%.

WHES was also included in BloombergNEF’s global Tier 1 energy storage manufacturer list for the fourth quarter of 2026. This marked its tenth consecutive quarter on the list and reflected its continued presence within the global energy storage supply ecosystem.

The company has delivered more than 1,300 on-site energy storage projects across over 50 countries and regions. Its C&I project portfolio includes a 1MW/2.33MWh project in Latvia, a 0.6MW/1.4MWh project in Sweden, and a 200 kW/466 kWh installation in the Netherlands. These projects demonstrate experience across different capacities, operating environments, and market requirements.

2.Technology and Product Iteration

WHES is a full-stack intelligent energy solution provider, with capabilities extending from hardware to software and from on-site equipment to cloud-based management. The company operates three principal research and development centers in mainland China and holds 195 intellectual property rights,supporting continued development across storage equipment and digital energy management.

WHES OS uses a cloud-edge-device architecture with an AI forecasting engine and hybrid algorithms combining physical models with data-driven analysis. Depending on the selected equipment and project configuration, it can coordinate functions such as peak-valley arbitrage, demand control, dynamic capacity support, and dispatch optimization. Supported configurations can also provide seamless on-grid/off-grid transfer in less than 20 ms and millisecond-level control.

3.Global Delivery and Localized Service

WHES has established six regional offices and more than 21 service locations worldwide. Its global headquarters is in Wuxi, China, with regional headquarters in the Netherlands, the UAE, the USA, and Australia. This structure supports project development, technical coordination, commissioning, and after-sales service across major international markets.

Independent data centers in China, Europe, Australia, and North America support regional data isolation and independent application deployment. WHES has also established 21 overseas spare-parts warehouses in countries including the United Kingdom, the Netherlands, Germany, Vietnam, Poland, Slovakia, Serbia, Thailand, Malaysia, and Australia.

This international network can contribute to efficient delivery when grid approval, permitting, customs clearance, civil works, and site readiness are properly coordinated. For example, the 1.1 MW/2.56 MWh Swedish project progressed from contract signing to formal grid connection in 26 days. It demonstrates WHES’s ability to coordinate equipment supply, engineering, commissioning, and local support.

4.Safety Certification and Regulatory Compliance

WHES has obtained more than 800 qualifications and certifications covering over 50 countries and regions. This broad certification portfolio supports project deployment across markets with different electrical, safety, and grid-connection requirements.

In addition, WHES is among a limited number of energy storage manufacturers with system-level qualifications covering both UL 9540 and VDE-AR-N 4110.

5.Long-Term O&M and Warranty Support

WHES has professional teams covering project management, engineering construction, and O&M. Field technicians hold electrical qualifications and are equipped with the required personal protective equipment. WHES provides on-site attendance within 48 hours and targets common fault resolution within 72 hours.

Its digital O&M capabilities include cell-level state-of-health and remaining-useful-life assessment. These functions support battery condition evaluation and the optimization of charging and discharging strategies. Multidimensional monitoring and edge analysis are also designed to identify abnormal signals associated with thermal risk, supporting earlier warnings and technical intervention.

WHES provides lifecycle support from solution design and commissioning to 24/7 maintenance assistance, spare-parts service, routine inspections, and preventive maintenance. Extended services can also include system expansion, life-extension refurbishment, and software or equipment upgrades.

Conclusion

A leading C&I energy storage manufacturer should be evaluated through shipment experience, technology, global delivery, compliance, and lifecycle service rather than a single ranking or product specification.

WHES performs strongly across all five dimensions. Its international shipment position, ten consecutive quarters of BloombergNEF Tier 1 inclusion, global project portfolio, full-stack technology, localized service network, extensive certification coverage, and long-term O&M capabilities support its leading position in the global C&I energy storage market. Project owners can work with WHES to evaluate site loads, tariffs, grid requirements, operating objectives, and certification needs before selecting an appropriate system configuration.