640kW Micro-inverter PV Project in Qiantang District, Hangzhou, Zhejiang

Hangzhou Qiantang 640kW Micro-inverter PV Plant

Module-level MPPT · Low-voltage DC safety · Efficient generation on complex roofs | 680,000 kWh/year · 677 t CO₂ reduction · 5–6 year payback

Safe & Efficient Rooftop PV Solution for C&I

Basic Project Info

• Project Location:C&I Rooftop in Qiantang, Hangzhou, Zhejiang
• Installed Capacity:640kWp
• System Type:All-microinverter distributed PV
• Operation Mode：Self-consumption, surplus to grid
• Construction Period:45days
• Commissioning Date:2024
• Avg. Annual Generation:~680,000 kWh

Project Background

This project is located in a high-end manufacturing park in Qiantang, Hangzhou, owned by a key local industrial enterprise. The large factory rooftop has complex structure, multiple orientations, and severe shading — traditional string solutions suffer high power loss and safety risks. Project requirementsSafe, reliable, easy O&M, production-friendly, and maximum generation revenue.，Finally, an all-microinverter solution was selected to create a C&I PV demo project in Qiantang District.

Project Challenges & Difficulties

• Complex roof structure, multiple orientations, susceptible to partial shading (equipment, flues, parapets)
• Owner demands high electrical safety, easy O&M, and long-term stability.
• Preserve roof waterproofing, short construction, no disruption to plant operations.
• Frequent rain, fog, and low-light days demand excellent low-light performance.

Core Solution (Micro-inverter Advantages)

• Module-level MPPT：One JPM-2000 micro-inverter per module eliminates mismatch, boosting generation on complex roofs by 12–18%.
• Ultimate safety (DC ≤60V)：No DC arc risk, eliminates shock hazards, meets building/fire safety codes.
• Flexible Adaptation to Complex Roofs:Supports mixing modules of different tilts, orientations, and power ratings — 100% utilization of usable roof area.
• Smart O&M (Module-Level Monitoring):Remote real-time monitoring of each module's generation data, precise fault location, online diagnostics — no system shutdown for maintenance.
• Plug-and-Play & Modular Installation:No central inverter room, simple wiring, short construction period — grid-connected in 45 days with minimal production impact.

Project Outcomes

• Generation Revenue:~680,000 kWh/year, saving ~550,000 RMB/year
• Safe & Reliable:Zero high-voltage hazards, zero fire risk — passed State Grid and fire safety acceptance.
• O&M Cost:60%+ lower than traditional string systems, with a 25-year lifespan.
• Green Benefits:~677 t CO₂/year, equivalent to planting 37,000 trees.
• ROI:5–6 year payback, stable returns over 25-year lifecycle.

Project Highlights & Significance

This project isQiantang District C&I Micro-inverter Demonstration Project，validating the excellent performance of micro-inverters on complex factory roofs, under high safety demands and low-light conditions. Key highlights:

• Excellent low-light performance for Hangzhou's rainy/foggy climate — more stable year-round generation.
• Modular expansion, easily scalable to 1MW+, compatible with PV-storage-charging integration.
• Equipped with a smart energy management platform for visualized generation, carbon reduction, and revenue data — more efficient O&M.

Provides for C&I distributed PV in the Yangtze River Deltasafe, efficient, replicablemature solution, helping enterprises save energy, reduce costs, achieve green transformation, and promote high-quality growth of the regional new energy industry.