Start with the use case, not the product name
Start by describing the actual site and business goal. Product names are useful, but the operating requirement is what determines the final configuration.

Translate the requirement into measurable inputs
Send size, use period, ground, location, enclosure, doors, accessories, schedule and available photos or drawings.

Confirm scope before comparing suppliers
Ask each supplier to quote the same structure, enclosure, transport, installation and accessory scope.
