Empowering Green Growth: Hoymiles' High-Reliability Energy Storage Solutions Safeguard Wenzhou's C&I Energy Transition

In the vibrant economic hub of Wenzhou, Zhejiang, enterprises are increasingly adopting energy storage as a strategic lever for costreduction, operational efficiency, and sustainable energy transition. However, coastal climate of high temperatures, humidity, and frequent typhoons poses significant challenges to the long-term reliability and return on investment of the power stations.

After completing the project in 2025, Hoymiles’ technical team arrived in Wenzhou to perform comprehensive "health checks" on multiple energy storage sites in the area.

The first inspection stop was a sports center. Home to electric vehicle fast-charging stations, battery-swapping stations, and large-scale sports venues, this area is characterized by heavy traffic and high power demand. Hoymiles’ safe and reliable energy storage systems, and the team's comprehensive, full-lifecycle professional services have made this project a lasting success.

Addressing Safety and Reliability in Extreme Conditions

The Laike Sports Center faces multiple operational challenges:

• Operational Stability Concerns:The sites are adjacent to fast-charging stations and battery swapping facilities operate continuously under high load. Any unplanned shutdown risks would disrupt core business functions and incur immediate economic losses.

• Environmental Challenges:The coastal climate’s high temperatures, humidity, and salt fog put equipment durability to the test—traditional solutions often underperform under these severe conditions.

• Operational Expertise Gaps:Many clients lack dedicated technical teams to deal with potential faults, which makes intelligent, preventative maintenance solutions supported by expert service all the more crucial.

As one of our senior engineers observes, “Such environments demand the highest standards of safety and stability from energy storage systems. Every detail must be meticulously engineered to ensure seamless operation.”

The project used HoyUltra 2, Hoymiles’ next-generation fully liquid cooling C&I battery system.

Product Resilience Engineered for Harsh Environments

In Wenzhou, the HoyUltra2 energy storage system proves its resilience against complex environments with its secure, reliable, and stable performance.

The HoyUltra2 system is built to endure. Its IP65 protection and C5 anti-corrosion rating form a strong defense against Wenzhou's salt fog and torrential rains. "After the last typhoon, the cabinet interior remained spotless and fully operational," an engineer noted.

During extreme heat, the fully liquid-cooled thermal management system ensured battery cells consistently operated within the optimal temperature range, guaranteeing stable output under high loads. 

Meanwhile, Hoymiles’ self-developed EMS provided continuous, smart monitoring, identifying potential anomalies to enable a shift from reactive maintenance to proactive protection.

Proactive Services for Operational Peace of Mind

Products are only the first step. Hoymiles also has an expert team dedicated to technical service. 

For example, they used thermal imagers and insulation resistance testers to perform comparative analyses of cell voltage, temperature, and SOC status, going far beyond visual checks. Technicians also provided professional training for the customer's operations and maintenance personnel to enhance their self-maintenance capabilities. This is part of Hoymiles’ partnership model: empowering our clients, boosting their confidence and turning their staff into capable technicians.

True system reliability is reinforced through rapid, professional support. “During a recent site visit, we identified a minor seal issue that led to rainwater ingress, which triggered system shutdowns. Our team promptly addressed and rectified the problem on the spot,” says an engineer. “This confirms the robustness of our design and fault detection capabilities—critical for preventing larger failures.” 

Safety, Operational Excellence, and Trusted Partnerships

More than just a site visit, our Wenzhou inspection was a demonstration of Hoymiles’ customer-first commitment. Through the powerful combination of robust products and dedicated service, we ensure enduring value and reliable performance for our customers, even under extreme environmental and operational stress.

By collaborating with Hoymiles, clients have realized outcomes that surpass expectations:

• Unparalleled Reliability: Systems have operated flawlessly through multiple typhoon seasons and extreme heatwaves, establishing themselves as a cornerstone of local energy security.

• Economic Efficiency: Strategic peak-shaving and load management have substantially lowered operational costs, delivering clear, quantifiable ROI.

• Enhanced Confidence: Clients express strong trust in their energy infrastructure, praising Hoymiles’ responsibility, innovation, and proactive service as key drivers of their continued expansion.

“Partnering with Hoymiles has given us peace of mind,” says a client. “Their commitment and professionalism instill full confidence to scale our operations.” 

The success of Wenzhou exemplifies Hoymiles’ comprehensive strength—innovative products paired with attentive service. We believe that cutting-edge technology must be complemented by dedicated support to generate maximum value for our clients. 

Moving forward, Hoymiles will continue fostering innovation, centering on customer needs, and contributing to the global transition to clean energy with more reliable, intelligent, and sustainable energy solutions.