1. Project Overview

Project Location:Tiantai County, Taizhou, Zhejiang Province

Installed Capacity:57.2kWp

System Solution:Full module-level grid-connected system with micro-inverters

Application: Industrial & commercial rooftops, private building rooftops (multi-slope, multi-orientation, partial shading)

Operation Mode: Self-consumption, surplus power to grid; Design lifespan: 25 years

2. System Configuration

PV Modules: 98 pieces of N-type high-efficiency monocrystalline 580Wp modules

Inverter:Standard micro-inverters with1:1 module-level matching

Grid Connection: Low-voltage grid access, complete set of AC combiner box, lightning protection, grounding and grid-connected protection facilities

Mounting System: Hot-dip galvanized aluminum alloy brackets, compliant with local wind resistance and anti-corrosion standards of Tiantai

3. Project Highlights

1. Independentmodule-level MPPTavoids overall power loss caused by multi-orientation arrangement and shading from trees or parapet walls, effectively reducing energy mismatch loss.
2. Full low-voltage DC design eliminates high-voltage arc risks, perfectly adapted to rainy and humid rooftop environment in South China.
3. Real-time independent monitoring of each module, precise fault location, simple and efficient operation and maintenance.
4. Outstanding low-light power generation performance, well adapted to Tiantai’s sunshine condition, stable output in cloudy, morning and evening hours.

4. Power Generation & Revenue

Annual equivalent utilization hours: 1150–1250h

First-year power generation:75,000–78,000 kWh

Average annual power generation in 25 years:70,000 kWh

Compared with traditional string inverter solution, an extra 8,000–12,000 kWh is generated every year with higher long-term returns.

5. Project Value

Economic Value: Reduce power consumption cost for factories and households; gain extra income from grid feed-in with stable investment return.

Safety Value: Micro-inverter low-voltage design completely removes high-voltage hidden dangers of rooftop PV systems.

O&M Value: Cloud remote real-time monitoring reduces frequent on-site inspection and later maintenance cost.

Environmental Value: Annual standard coal saving: 56 tons; Annual CO₂ emission reduction: 140 tons, acting as a green low-carbon demonstration project.

6. Case Summary

Customized for irregular,multi-orientation and partially shaded rooftops,this 57.2kW micro-inverter PV station fully leverages the strengths of micro-inverters.It delivers high power efficiency, safe operation, easy maintenance and stable profits,which is a typical demonstration case for distributed PV projects on complex rooftops in Zhejiang.