Requiring a visa for SOLAR CONVENTION LAS VEGAS to United State. It is your responsibility to apply for a VISA with the U.S. embassy. Please see http://travel.state.gov/visa_services.html for more information.
To request a letter of invitation from SOLAR CONVENTION LAS VEGAS please email managment@solarlas.com with these documents :Company , Contact name ,title, mailing address, phone number , passport number ,date of birth ,email address and company website.