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A cabin with no plumbing, a van parked far from a dump station and a boat with no room for a black tank all face the same choice, and composting toilet vs incinerating toilet is the question that decides how waste leaves the vehicle. A composting toilet dries the solids and diverts the liquids so the waste can be bagged and carried out, while an incinerating toilet burns the waste to a small amount of ash. The guide below compares them from the listings, with the sizes and capacities the makers state.
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The quick answer
A composting toilet suits a setup with no power and no plumbing: it needs no electric hookup, no water and no dump station, and the waste leaves in a bag. An incinerating toilet suits a setup with power and a vent: it burns each use to ash, so there is no solid waste to carry, but it needs a power source and a flue to the outside. The reference listings cover the composting side only: the OGO NOMAD and the TRELINO Evo S, plus coir disks and a urine diverter for the composting setup. Pick composting when power is scarce and bagging waste is fine; pick incinerating when power and venting are easy and handling waste is not.
How a composting toilet works
A composting toilet keeps liquids and solids apart. A urine diverter sends liquid to a front container and solids to a rear container with a drying medium, which keeps the smell down and lets the solids dry out. The OGO NOMAD works with no electric and no plumbing, and its simple bag system uses widely available 8-gallon bags, so the solids leave in a tied bag for disposal per local guidelines. The TRELINO Evo S states a urine container of 1.2 gallons and a solid waste container of 1.6 gallons, with room for 9 to 11 uses of the urine side and 6 to 8 uses of the solids side, and it supports up to 330 lbs. The LEIFIDE coir disks, 12 pieces at 3.14 by 0.5 inches, or 8 by 1.27 cm, expand with water and dry the solids while helping airflow and odor control, and the Frienda urine diverter, at 13.5 by 11.4 inches, separates liquid from solid at the source for a 5-gallon bucket toilet or a DIY setup. The OGO NOMAD measures 15.4 by 13.0 by 12.38 inches and weighs 12.0 pounds, so it fits a truck bed, a car trunk or a small boat.
How an incinerating toilet works
An incinerating toilet burns waste to ash with heat, so nothing leaves in a bag and no dump station is needed. Each use drops into a burn chamber, and a heating element or gas burner reduces it to a small amount of sterile ash, which is emptied now and then. The toilet needs power for the heater and the fan, plus a vent pipe through the roof or wall so heat and fumes leave the cabin. It uses no water and no chemicals, and the ash can be tipped out like fireplace ash. The trade is power and venting: without a steady power source and a proper vent, the toilet cannot run, and the burn cycle takes time between uses.
Composting toilet vs incinerating toilet: the differences
| Point | Composting toilet | Incinerating toilet |
|---|---|---|
| Power | No electric needed; OGO NOMAD states no power source or wiring required | Needs power for the heater and fan |
| Water | No water; drying function prevents odor | No water |
| Waste leaves as | Bagged solids; 8-gallon bags on the OGO NOMAD | Ash, emptied now and then |
| Emptying | TRELINO Evo S: 9 to 11 urine uses, 6 to 8 solid uses | After a set of burn cycles |
| Smell control | Urine diversion plus drying medium; coir disks help airflow | Heat and venting carry fumes outside |
| Install | Portable; TRELINO Evo S at 13 by 15.4 by 11.7 inches | Needs a vent pipe and a power source |
The table states the split in plain terms: composting trades handling for independence, while incinerating trades power and venting for no handling. The listings give no incinerating toilet, so the incinerating column states how the type works rather than a listed model.
Gear for the composting side
The 4 listings all sit on the composting side, so the gear below covers that half of the comparison. The OGO NOMAD is the full toilet: urine-diverting, portable, at 15.4 by 13.0 by 12.38 inches and 12.0 pounds, with an 8-gallon bag system and no electric or plumbing. The TRELINO Evo S is the compact rival: 1.2-gallon urine and 1.6-gallon solids containers, 9 to 11 urine uses and 6 to 8 solid uses, support up to 330 lbs, and a 2-year manufacturer warranty. The spec table lists 0.0 inches for its dimensions, against 13 by 15.4 by 11.7 inches in the title, so trust the title. The LEIFIDE coir disks are the drying medium: 12 pieces at 3.14 by 0.5 inches, or 8 by 1.27 cm, that expand with water and help dry the solids. The Frienda urine diverter is the DIY part: 13.5 by 11.4 inches, or 34.3 by 29 cm, in ABS plastic with a stainless steel sink lid, made for a 5-gallon bucket toilet, an RV or a boat. No incinerating toilet appears in the listings, so the gear here cannot rank that side.
Which one should you buy?
Pick a composting toilet when the cabin, van or boat has no spare power and no vent run: it works anywhere, it runs with no power and no water, and the only chore is bagging and carrying the solids. Pick an incinerating toilet when power is steady, a vent pipe can run outside, and the crew wants no contact with waste at all: the ash empties like fireplace ash and there is no bag to carry. For a small van or a boat, the composting side wins on size and weight: the TRELINO Evo S fits a van or tent, and the OGO NOMAD fits a truck bed or a car trunk. For a cabin with power and a roof vent, the incinerating side wins on convenience. Whichever side wins, check local guidelines for disposal before buying, since the bag and the ash follow different rules.
FAQ: power away from the grid
Do composting toilets smell?
They should not when the urine stays apart from the solids. The OGO NOMAD uses a urine-diverting design to keep liquids and solids apart and prevent odor, and the TRELINO Evo S states that its separation and drying function prevents odor. Keep the diverter clean and the solids dry, and the smell stays down.
How often do you empty a composting toilet?
It depends on the container size and the crew. The TRELINO Evo S states room for 9 to 11 urine uses and 6 to 8 solid uses before emptying, and the OGO NOMAD uses 8-gallon bags that tie off for disposal per local guidelines.
Does an incinerating toilet need water or a dump station?
No. An incinerating toilet burns waste to ash with heat, so it needs no water and no dump station. It needs power for the heater and fan, plus a vent pipe to the outside.
Can I use a composting toilet in an RV or a boat?
Yes. The OGO NOMAD is made for truck campers, pop-up tents, rental camper vans and small boats, and the TRELINO Evo S is made for vans, tents and cars. Each needs no plumbing and no dump station. See the guide on where to buy a portable toilet for more options.
What do I put in a composting toilet?
A drying medium, such as coconut coir. The LEIFIDE coir disks measure 3.14 by 0.5 inches, expand with water and help dry the solids while improving airflow. Soak the disks before use and add water slowly while stirring, as the listing states.
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