I live aboard alone, but have occasional guests. I have 2 14kw generators, but don't want to run one continuously like po did. So I put in a large 120/240 inverter system.
I have 2 Incinolets, a 120v and a 240v. They use about 1kwh a flush, cycling heat on and off to maintain burn temps. The toilets are used daily and probably average 2 flushes a day. I run mine with an inverter when running or anchored. Running the mains, I have an alternator to keep the batteries up so I don't have to run a generator. I don't go where it's hot so no AC draw. I didn't want to fit in a holding tank and knew no discharge zones would expand.
I have several inverter battery banks and go about 3 days between generator runs. I time the generator to laundry and making fresh water unless I have several other people aboard.
I like them. No problems since 2011, no parts other than the liners. Beats taking a marine toilet apart when it fails. Maintenance is easy, dump the ash depending on use, wipe down the stainless steel, and clean the blower wheel every 6 months. Blower wheel is easy to access and not smelly. Blades will eventually get a buildup that reduces air flow. After years of no maintenance will get a creosote like buildup. I have one spare wheel I swap out. Cleaned by soaking in detergent and spraying off.
Because a blower runs when running, no smell in the head. If you plan your exhaust discharge, the burning is rarely noticed and when smelled is like normal burning, not sewage. I like the 240v model better, smaller power wiring, seems to run for a shorter time.