When we got new tires, we replaced the Hella TPMS with a TireMinder i10. TireMinder uses external sensors, which has some drawbacks, but that also means it can monitor pressures other than in tires. Along with sensors on the four tires and the spare (mounted on Dill VS-944R short valve stems), we have sensors displaying the pressures in the two rear air springs, and in the air compressor tank.
While the Kenwood needs to be replaced at some point due to its horribly outdated maps, in the meantime we have hooked up a used GXM30 XM antenna to it, to enable XM traffic and weather data.
Darryl's original text:
Two Solara flexible panels installed on the top along with a connection point for external panels at the right rear above the bumper. They seem to work OK but are showing signs of age. Plastic covering is starting to separate in some places.
I installed a Kenwood DVD Nav unit after a year or so of ownership and it still works great. Sadly Kenwood (Garmin) doesn't support the database used in our unit so updates are no longer available. We also have a backup camera. The back up sensor system no longer works because the buzzer has failed. (I just ordered a new buzzer). We have a drop down Monitor that allows us to watch movies.
During the original installation we upgraded the speakers and added rear ones along with an add on amplifier and removable sub woofer. We don't use the sub because that's where the leveling blocks have to go.
We have a Cobra CB/weather radio which is great for caravaning, especially in Mexico. Using it almost killed us in Baja but that's another story. I also installed one of the government "free" digital/analog TV tuners that is hooked up to the pop top built in antennae. It works OK if you are in an area with lots of strong over the air signals which is never where we want to use it. (Yes we had to have EVERYTHING... Sigh!)
I recently installed the Blue Sea battery separator. Read all about it in the Electronics section. SMB installs them in their new builds and for good reason.
We have the single AGM 200 amp battery and are on our third one along with our third set of van batteries. Last set of all three lasted about 7 years. I Attribute the longevity to plugging in whenever possible. We are lucky and are able to garage our van year around.
We had a Hella tire pressure/temperature monitor system that used to work great until Hella stopped making them along with replacement sensors. The display looks cool though even though there is nothing to display anymore. I'm still searching for a replacement system.