I saw the option of the transponder. We usually rotate cars each time for the trip, so that would be great.
Question... are the passes/transponders good until you cancel them so we could use them for several years in a row? Wasn't sure if they expired after a certain amount of time. One of the fields during ordering asks for a start and end date. How does that work?
WOW ... there's a ton of misinformation in this thread! Some truth, but clouded by misunderstanding. I recommend going to SUNPASS.COM and reading up.
If from out of town and wanting a SUNPASS, get the more expensive one. You can move it from vehicle to vehicle and it is good "forever". You can even register MORE THAN ONE VEHICLE at a time (can't do either with the Mini-Sticker). And here's something they don't tell you: technically you don't even need the transponder in the car IF the tag has been registered to the transponder. How do I know? I have several times traveled 'tween WDW and Port Canaveral without the transponder in the car. No foul .... no fines ... the tolls show up on my bill just as if the transponder WAS in the car. (I have 4 cars and one transponder .... most of the time the transponder is at home in a drawer!)
VERY SIMPLIFIED: The way the system works when you pass thru an electronic lane in an area that is NOT electronic ONLY 1) use transponder if found 2) if not found, check SUNPASS database for the tag, if found charge the transponder account the regular transponder (discounted) toll, nothing found equals a fine if you did not use the PAY lane. {the toll plazas on 417 and the Beachline/528 operate this way with the exception of a few 'local' exits that a visitor would probably not use}
IF AN ELECTRONIC ONLY AREA (primarily Dade County) with no transponder or registration in the database, process as toll by plate - if this was on your vehicle you get a monthly bill with a SMALL service charge; if this was a rental car ... the rental company gets this bill & you may get ZAPPED with extra fees BY THE RENTAL COMPANY. How they handle activating electronic toll payment varies by rental company and some will zap BIG $ if you don't sign up in advance and then accrue an electronic toll. See https://www.sunpass.com/rentalcar
IF YOU BOUGHT A SUNPASS over a year ago, and it is the one that has lights & beeps to confirm transactions - and uses a battery (about the size of a pack of cigarettes) this type of transponder will no longer work after the first of the year. Florida will replace it FOR FREE. See SUNPASS.COM The transponders are being upgraded as a set towards interoperability with other systems nation wide.
I found it was cheaper to buy two of the stickon Sunpass transponders and just attach one to my car and one to my wife's. I think it was around $5 for each of those vs $20-$25 for the portable version. Both of the stick-on ones are linked to the same Sunpass account.