Which solar technology, or a mix of technologies, works best for commercial rooftops?

Two fundamentally different technologies exist for harvesting sunlight to offset fossil fuel use—solar thermal (ST) and photovoltaic (PV) collectors.

Using a mixture of rooftop solar panels to generate electricity for the purpose of heating factories could help the industrial sector to slash its greenhouse gas emissions, a study finds.

The industrial sector consumes approximately 32% of the world's final energy demand, mostly in the form of heat which is derived primarily from fossil fuels.

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