Power generation of solar panels remains the same whether it's a residential use or a industrial. You can calculate the maximum power output of a solar panel by combine the efficiency of the cells with the size of the panel, that gives you a number commonly called the “power rating.” In the solar industry, we say “that panel is rated to produce X watts. Now a days you can see solar panels that produce 210, 280, even 320 watts. More the efficient solar panels, more the cost. So for Industrial use you will have to install more solar panels in accordance with your power needs that generates more power(Typically 320 watts solar panels). Agni Solar Systems Pvt Ltd (http://agnisolar.com/products/solar-rooftop-system/) can help you if you need any assistance for any solar related queries.