A rooftop solar retrofit across three aging metal-roof factory buildings.
This project has an installed capacity of around 890 kWp and covers three metal-roof factory buildings.
A quick summary of project type, roof condition, and the main retrofit logic.
Installed scale: approx. 890 kWp
Module configuration: 1459 modules of 610 W
Project type: commercial / industrial rooftop solar
Energy model: self-consumption
Investment model: self-built · self-invested · self-operated
Status: grid-connected and operating
Roof type: aging metal-roof buildings
Number of roofs: three factory buildings
Roof areas: approx. 2136 m² + 1680 m² + 1050 m²
Site condition: rooftop access, lifting, and working area broadly unconstrained
Instead of installing directly on the old roof, the project first adds a new metal-sheet layer over the existing surface.
The value is not in installing on the old roof quickly, but in rebuilding the roof base first and then delivering a more stable PV system.
Retrofit path: roof renewal, PV installation, and long-term system operation.
The three factory roofs are aging metal-sheet structures with corrosion and leakage risks, making direct installation a poor long-term solution.
A new metal-sheet layer is added above the original roof, creating a more installation base before PV construction begins.
Inverters are positioned according to on-site conditions, and cable routing is organized through trays for a cleaner and more serviceable electrical path.
The project is self-invested, self-built, and self-operated, without energy storage.
Site photos, roof conditions, and installation references.
Factory building 1
Factory building 2
Aerial view of the factory roofs
Electrical system drawing
Grid connection cabinet
Module cleaning in operation phase
Installed result on factory building 1
Installed result on factory building 2
Send roof photos, usable area, access conditions, and expected capacity for a first feasibility review.