A self-invested rooftop solar project on an existing concrete flat roof.
Located in Qingyuan, Zhejiang, this project has an installed capacity of around 376 kWp and is already grid-connected.
Commercial rooftop solar with a ballasted array system and a clear return model.
Installed scale: approx. 376 kWp
Project type: commercial / industrial rooftop solar
Energy model: self-consumption
Investment model: self-built · self-invested · self-operated
Status: grid-connected and operating
Location: Qingyuan, Zhejiang
Building type: existing building with flat concrete roof
Roof condition: large roof area with on-roof pipelines and equipment
Site constraint: elevated building height requiring large-crane lifting
The project uses a non-penetrating support system with concrete blocks and steel array structure, adapted to flat concrete roof conditions while protecting the waterproof layer.
A fixed electricity-sale model is used, with project recovery over about 42 months and transfer of the station afterward.
Focus: structure, electrical safety, maintenance logic, and commercial return.
Because of the building height, installation depended on crane lifting and careful rooftop organization.
The array layout follows a ordered installation logic suited to a concrete flat roof.
The inverter combination uses 60 kW, 50 kW, and 33 kW units for system matching.
The project follows a formal contract and registration path, with insurance included during implementation.
Site photos, roof conditions, and installation references.
Building and roof before construction
Roof overview before construction
Lifting conditions
Crane lifting on site
Concrete block transfer and positioning
Module installation
Module installation progress
Inverter installation
Send roof photos, usable area, access conditions, and expected capacity for a first feasibility review.