To activate a SunPass transponder, log in to your SunPass account at SunPass.com, click on the transponders menu on the dashboard, and click Activate New Transponders. Type your transponder number twice, then enter your payment information. Load your account with at least $10 to activate the transponder, as of 2015.
The SunPass Prepaid Toll Program allows users with SunPass transponders in their vehicles to pay Florida highway tolls from a prepaid account. With the SunPass prepaid account, drivers can get through tolls more quickly, without having to wait in lines, stop or have cash available to pay the tolls. Mount the transponder on your vehicle's windshield, at which point your SunPass account is charged for the toll when the toll booth's reader equipment communicates with your transponder via radio signal.
An account at SunPass.com allows users to update personal information, load money and change payment options, and activate and deactivate transponders. Set up automatic reloads from a credit or debit card so there is always money in your account to pay your tolls. Add vehicles to your account, and order additional transponders online. If you are unsure how to use or access your SunPass.com account, look at the frequently asked questions section of the website, or call the SunPass Customer Service Center at 888-865-5352.