Nobody fills in a contact form to ask the price of a 10,000-euro installation.
On Etrica, a sustainable energy company, the old site ended in a cold form. Visitors didn't know if they needed panels, a battery, a heat pump or a charger, so they left instead of asking.
We replaced the form with a guided quote: pick your situation and your solution, answer a few short steps, get a reply from a specialist. Less effort for the visitor, and Etrica receives a request it can act on instead of "how much is solar?".
The lesson I keep applying: when the product is expensive and technical, the form is part of the sales conversation. Design it like one.