Are the Tempest lenses polarized? Can't find anything on the website regarding that.
I have two sets of 509 heated:
Kingpin Ignite
Aviator 2.0 Ignite S1
I originally picked up the Kingpin's since we always seemed to ride through freezing rain at lower elevation on the way up--they worked well in preventing a layer of ice forming on the exterior of the lens. Both pairs definitely melt any snow that gets on the interior. Overall I'd call them both "ok". I don't feel either pair seals all that well with my 509 Altitude helmet. As much as I want to like the Aviators for the auto mode, the battery just doesn't last long enough. I'm starting to like the Kingpins more, because they don't fog near as often. I'd always wanted to try a set of ABOM's, but they went out of business before I ordered a pair. I'll probably pick up a pair of Tempest to try since both 509's fall into the "like but not love" category.
Kingpin Ignite:
Pros: More ventilation=less fogging. If I do fog, I hit the heat button on the battery pack, and the fog clears quick. Battery life with manual or always-on is pretty good.
Cons: No app support, proprietary charger, battery is on the right side which means removing hands from the throttle to turn on the heat. These have A LOT of venting, and can be cold in cold/windy conditions. The cable that goes from the lens to battery also gets stiff in the cold, and is prone to breaking where it connects to the lens--509 replaced one of mine under warranty. A buddy had the cable break off in the same place, but it was not covered under warranty since that apparently falls under the one year warranty instead of the lifetime warranty.
Aviator 2.0 Ignite S1:
Pros: Battery on the left strap, but no need to interact with it if you use the app. App support for auto and manual mode. Mini-USB charger. Warmer due to less venting. Cable is improved/softer, so stays flexible in cold weather. Super easy to change lenses with the magnetic system.
Cons: Fogs easily when we stop or are moving slow through deep snow. Battery life is much less than the Kingpin on either manual or auto mode--these frequently go dead on me, so either a second battery is needed, or I switch to the Kingpin's to get through the second half of the day. Sometimes the auto mode works great to run the fan to clear fog, and then sometimes it doesn't run when the goggles are on and I'm all fogged up. Sometimes the fan will run when I have the goggles off hanging on my handlebars when we are stopped. Battery housing is bigger/bulkier.