We have been seriously looking at retiring to canal boat, cruising the UK canals in summer. Doing my homework on these I have learned a lot about off grid living since they have to be fully self contained if you are not going to live in a Marina. Most have solar power and a battery bank, inverters for 110 Volt. Of course sewage is an issue too.
One of the things I learned about was the cassette toilet. They are popular with boaters. There are places along the canals just for emptying these as well as topping off with water.
Since our backup plan is extending camping trips out west we have been looking at boondocking and a cassette toilet seems like a good option since you can empty one into a public toilet. Seems the biggest drawback is without the proper chemicals, the smell when you empty it can be pretty horrific. But boaters seem to have figured it out. Then of course some people have a real aversion to handling a tank full of sewage, which I get.
Curious if anyone has installed one in there camper? Seems to me if you can deal with handling the cassette it offers some advantages.
We use the traditional porta-potty (one gallon or so a day) and it can be tricky to empty. I do it in the campground bathroom and strive to do it when it's very late. I'm very careful and never spill a drop but I can see why camp hosts don't like it. The the tank above needs a pump and dump station.
Cassettes have been around for many years, mainly in smaller truck campers and pop ups. They are similar to a Porta potty except you don't handle the top part of the potty to dump. I say pick a toilet that is more compact and easy to handle. Check into the Curve.
Also keep in mind that the more capacity the tank holds, the heavier/more awkward it is to dump.
Most of the ones I have seen, tanks are around 5 gallons. Just the two of us so not a big deal. With kids .... yea. Most boats have at least one spare. Some carry 3. In winter you can get iced in and not be able to get to a Service point for a couple of days. I think a spare in a camper would be a good idea too.
Not sure about the one you show but the ones I am looking at have a slide out tank, similar to the porta-potti. No need for a pump, just take the cassette to the dump site, toilet or whatever.
Some new trailers come with them. Have an access door on the outside to remove the cassette. I am guessing they are so new here in states many are not familiar with them.
If you decide to go there this is the one you want. Yes it is very easy to dump and the cassette comes out and goes back in from the OUTSIDE of the trailer through an access door. Never any smell inside the trailer. Expensive but very efficient. I know people using them in RVs and Trailers and they love them. The other choice is a removable composting toilet.
God grant me the strength to restore the trailers I can, The courage to strip the parts off the ones I can't, And the wisdom to know the difference...