first of all, I don't know where you found your market, car shows, etc, but that's great you obviously have some kind of customer base, and you guys are dedicated and had the ingenuity to come up with something. Wherever you had success originally you NEED TO DUPLICATE that 1000 times over. So if it is the rapport you get at car shows or conventions or whatever and allows you to create customers, then hit every damn show/convention out there. Yea, go on the road. Secondly, advertising on the web MAY help, but everyone is telling you to take a sledge to your site because it looks like your selling the Anarchist's fucking cookbook or something.
okay so good put a check mark next to design the living hell out of my web site.
Put your commodity on the front page.
Put the photos of cars tricked out with hydrogen power on the front page.
Put testimonials next to your commodity and the cars tricked out with hydrogen power on the front page.
If installation is fairly simple, put a quick, very professional video of you installing the system on the front page.
And slap a big button on there that says "RUN YOUR CAR ON ACAI BERRIES. ORDER NOW!"