After a commercial solar installer gets in touch, they’ll want look at few of your previous bills to ascertain how many units (kWh) you use on average per day. They will also ask you questions about your business, it’s operating hours and general electricity
Once they’ve figured this out they’ll suggest a system [an array of panels and an inverter] that maximises the available roof space and will produce a similar amount to this or one that produces slightly more depending on anticipated growth in usage or how much power usage you can shift into the middle of the day [washing machines, dishwashers, etc].
From there, they’ll recommend a few sizes with different quality components depending on your budget, taking into consideration any system related future proofing.
Lastly, conversions will focus on suggestions for a suitable energy monitoring system, if that is part of your business requirements.