The form of the steel roof and the structural form of the building have a great influence on the engineering cost of the photovoltaic support. Generally speaking, the roof with high waterproof level, no exposed roof waterproof layer, larger live load, good overall structure of the building and strong load-bearing capacity, the lower the project cost of the steel roof photovoltaic power station, on the contrary, the project cost will be relatively high.

Several factors to be considered in the installation of steel roof power station:

1. Whether the service life of the steel on the roof can reach the maximum life required by the photovoltaic power station.

2. Whether the load bearing of the roof can meet the specification requirements of distributed photovoltaic power plants.

3. Requirements for the waterproofing of the roof after installing the photovoltaic power station.

4. For the different orientation of the roof, the design of the photovoltaic support system matrix.