Community Guidance?- Products for separate customers..

[Capt. Nemo]

Hi there,
I'm creating a site for a heating company that sells both solar, and non-solar products.
Contractors are a conservative bunch, and the client would like to separate solar, from non-solar, as much as possible.

Granted that separately viewable products is not possible, what do you think the best solution to this issue is?

any help from the community here is greatly appreciated,
and thanks for a great thing, S

Capt. Nemo