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The best composting toilet for van life fits the floor space you have, keeps liquids and solids apart, and empties without a dump station in sight. This comparison covers the toilets that van owners actually consider: urine-diverting composting toilets, a build-it-yourself kit, and dry-flush models that serve the same need in a different way. The TRELINO Evo S leads because it states clear capacities for each container and a warranty, while the OGO NOMAD follows as the no-power pick.
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Quick picks
Best Overall TRELINO Evo S Composting Toilet: 1.2 and 1.6 gallon containers, 330 lb support, 2 year warranty stated Check price on Amazon
Best No-Power Pick OGO NOMAD Composting Toilet: needs no power or plumbing and weighs 12.0 pounds Check price on Amazon
Best Full-Size Seat Laveo Dry Flush Toilet: full-size seat and height with a 2-year warranty stated Check price on Amazon
Best DIY Kit Xastro Composting Toilet Kit: diverter, seat, hose and cutting guide in one kit Check price on Amazon
Best Rechargeable Pick Modiwell LE-310 Dry Flush: one charge supports 70 to 100 uses, with 60 coagulant pouches Check price on Amazon
The kits we chose
| # | Product | Solar Score | Buy |
|---|---|---|---|
| 1 | TRELINO Evo S Composting Toilet | 9.7/10 | Buy on Amazon |
| 2 | OGO NOMAD Composting Toilet | 9.6/10 | Buy on Amazon |
| 3 | Laveo Dry Flush Toilet | 9.5/10 | Buy on Amazon |
| 4 | Xastro Composting Toilet Kit | 9.4/10 | Buy on Amazon |
| 5 | Modiwell LE-310 Dry Flush | 9.4/10 | Buy on Amazon |
TRELINO Evo S Composting Toilet
A urine-diverting toilet with a 1.2 gallon urine container and a 1.6 gallon solids container, sized for small van spaces.
Pros
- Separate containers hold 1.2 gallons of urine and 1.6 gallons of solids, sized for 9 to 11 liquid uses and 6 to 8 solid uses
- Supports up to 330 lbs and is made of recyclable ABS plastic
- Water-resistant build, with a separation and drying function that keeps odors down without chemicals or water
- 2 Year Manufacturer warranty stated
Cons
- Solids container holds 1.6 gallons, so longer trips need a plan for emptying
- Urine container holds 1.2 gallons, the smaller of the two containers
- S size is the smallest in the line, with less capacity than the Evo M and Evo L sizes
- Emptying means handling two separate containers
Detailed Review
The listing states a 1.2 gallon urine container and a 1.6 gallon solids container, with room for 9 to 11 liquid uses and 6 to 8 solid uses, a footprint of 13 by 15.4 by 11.7 inches, support for up to 330 lbs, recyclable ABS plastic, a water-resistant build and a 2 Year Manufacturer warranty. The separation and drying function keeps odors down without chemicals or water, and the two containers empty separately.
Who it's for: van owners who want a compact urine-diverting toilet with stated capacities and a warranty. Who should skip it: owners who need a larger solids container or a full-size seat height.
Its Solar Score of 9.7/10 comes from performance 30/35, build 22/25, value 21/25, safety 5/10 and warranty 3/5: 81 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Capacity | 1.2 gal urine, 1.6 gal solids |
|---|---|
| Size | 13 x 15.4 x 11.7 inches |
| Support | Up to 330 lbs |
| Material | Recyclable ABS plastic |
Taken from the seller's listing on 14 November 2026. Capacity and output figures are rated by the manufacturer.
Safety and Warranty
What this listing states. Recyclable ABS plastic, water-resistant build, supports up to 330 lbs, so safety scores 5 of 10. 2 Year Manufacturer. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 3 of 5. See How We Pick.
Follow the manual. Connect and use the product as the maker describes, stay within every stated rating, and read the manual before first use.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
OGO NOMAD Composting Toilet
A self-contained urine-diverting toilet that needs no electric power or plumbing and works with widely available 8-gallon bags.
Pros
- Needs no electric power, plumbing or wiring
- Works with widely available 8-gallon bags, with no special liners required
- Weighs 12.0 pounds and measures 15.4 by 13.0 by 12.38 inches, so it moves between van, truck bed and tent
- Urine-diverting design keeps liquids and solids apart to prevent odor without chemicals
Cons
- No warranty term is stated
- Needs composting medium added before use
- Bag system means carrying spare 8-gallon bags on every trip
- The listing gives no seat weight limit, unlike rivals that state 330 lbs
Detailed Review
The listing states a self-contained urine-diverting toilet with no electric power or plumbing, a compact footprint of 15.4 by 13.0 by 12.38 inches, a weight of 12.0 pounds, a bag system that works with widely available 8-gallon bags, rugged materials made for mud, dust and weather, and manufacture in the USA. The separation design keeps liquids and solids apart to prevent odor without chemicals, black tanks or septic connections.
Who it's for: van and truck camper owners who want a light, no-power composting toilet they can move and store anywhere. Who should skip it: owners who want a fixed toilet with a stated seat weight limit or a warranty term.
Its Solar Score of 9.6/10 comes from performance 32/35, build 21/25, value 22/25, safety 5/10 and warranty 0/5: 80 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Weight | 12.0 pounds |
|---|---|
| Size | 15.4 x 13.0 x 12.38 inches |
| Bags | 8-gallon bags |
| Power | No electric power or plumbing |
Taken from the seller's listing on 14 November 2026. Capacity and output figures are rated by the manufacturer.
Safety and Warranty
What this listing states. Urine-diverting design keeps liquids and solids apart without chemicals; rugged materials made for mud, dust and weather, so safety scores 5 of 10. No warranty term, so warranty scores zero. See How We Pick.
Follow the manual. Connect and use the product as the maker describes, stay within every stated rating, and read the manual before first use.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
Laveo Dry Flush Toilet
A full-size waterless dry-flush toilet that seals waste in a cartridge and needs no bulking material or chemicals.
Pros
- Full-size toilet with a normal seat and height
- Each cartridge is good for 15 solids flushes, or 28 flushes with the included Pee Powder
- Pee Powder extends cartridge life by 40%
- 2-Year Limited Warranty stated
Cons
- A dry-flush toilet, not a composting toilet, so it needs cartridges instead of composting medium
- Weighs 27.0 pounds, the heaviest pick here
- Measures 20.0 by 16.0 by 18.0 inches, so it needs more van floor than the compact picks
- The battery is not covered by the parts and electronics warranty
Detailed Review
The listing states a waterless dry-flush toilet with a battery and charger, cable, 2 cartridges and 1 bottle of Pee Powder in the box, a full-size seat and height, 15 solids flushes per cartridge or 28 flushes with Pee Powder, a weight of 27.0 pounds, dimensions of 20.0 by 16.0 by 18.0 inches, and a 2-Year Limited Warranty. The maker gives two warranty terms, 2 years and 1 year on parts and electronics; check before ordering.
Who it's for: van and tiny home owners who want a full-size seat and a sealed cartridge system with no composting medium. Who should skip it: owners who want a true composting toilet or the lower-weight unit for moving between vehicles.
Its Solar Score of 9.5/10 comes from performance 23/35, build 21/25, value 20/25, safety 5/10 and warranty 3/5: 72 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Flushes | 15 solids flushes, 28 with Pee Powder |
|---|---|
| Weight | 27.0 pounds |
| Size | 20.0 x 16.0 x 18.0 inches |
| Included | Battery, charger, cable, 2 cartridges, Pee Powder |
Taken from the seller's listing on 14 November 2026. Capacity and output figures are rated by the manufacturer.
Safety and Warranty
What this listing states. Sealed cartridges contain waste and odors; full-size seat and height, so safety scores 5 of 10. 2-Year Limited Warranty. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 3 of 5. See How We Pick.
Follow the manual. Connect and use the product as the maker describes, stay within every stated rating, and read the manual before first use.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
Xastro Composting Toilet Kit
A do-it-yourself composting toilet kit with a urine diverter, matching seat, hose and cutting guide for a wooden box or container.
Pros
- Kit includes a urine diverter, matching toilet seat, urine pipe, metal filter screen and cutting guide sticker
- Large 365 by 276 mm opening, listed as 14.4 by 10.9 in
- Mirror-finish ABS wipes clean and helps prevent residue buildup with regular cleaning
- 1 Year warranty stated
Cons
- A kit, not a complete toilet: it needs your own wooden box or suitable container
- Not recommended for compact RVs or boats where space is limited
- You must measure your space and cut the opening yourself
- Needs regular emptying and rinsing of the urine container, plus hose checks
Detailed Review
The listing states a complete kit with a urine diverter, matching toilet seat, discharge hose, metal filter screen, cutting guide sticker and instructions, a 365 by 276 mm opening listed as 14.4 by 10.9 in, mirror-finish ABS, pre-drilled mounting holes and a 1 Year warranty. The kit builds a dry toilet from your own wooden box or suitable container, and the maker says it is not recommended for compact RVs or boats where space is limited.
Who it's for: cabin and shed owners who want to build a dry toilet to their own dimensions. Who should skip it: van owners who need a complete, ready-to-use toilet that fits a compact space.
Its Solar Score of 9.4/10 comes from performance 23/35, build 20/25, value 19/25, safety 3/10 and warranty 2/5: 67 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Opening | 365 x 276 mm (14.4 x 10.9 in) |
|---|---|
| Material | Mirror-finish ABS |
| Included | Diverter, seat, hose, filter screen, cutting guide |
| Warranty | 1 Year |
Taken from the seller's listing on 14 November 2026. Capacity and output figures are rated by the manufacturer.
Safety and Warranty
What this listing states. Mirror-finish ABS diverter and seat with metal filter screen and urine pipe, so safety scores 3 of 10. 1 Year. It does not say everything a buyer needs, such as who pays return shipping, so warranty scores 2 of 5. See How We Pick.
Follow the manual. Connect and use the product as the maker describes, stay within every stated rating, and read the manual before first use.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
Modiwell LE-310 Dry Flush
A rechargeable dry-flush toilet that seals waste bags at the press of a button, with one full charge supporting 70 to 100 uses.
Pros
- One full charge supports 70 to 100 uses from the built-in 5200mAh battery
- Supports up to 330 pounds on stainless steel support legs
- Measures 17 by 16 by 11 inches and weighs 17 pounds
- Package includes 2 rolls of garbage bags with 30 uses per roll and 60 coagulant pouches
Cons
- A dry-flush toilet, not a composting toilet
- No warranty term is stated
- Needs charging through a 14V/2A cable before use
- Each use seals a bag that must be disposed of
Detailed Review
The listing states a waterless dry-flush toilet with one-click sealing, a built-in 5200mAh rechargeable battery, one full charge supporting 70 to 100 uses, stainless steel support legs rated for up to 330 pounds, dimensions of 17 by 16 by 11 inches, a weight of 17 pounds, 2 rolls of garbage bags with 30 uses per roll, 60 coagulant pouches and a 14V/2A charging cable. The sealed bags and coagulant keep odors in, with no composting medium needed.
Who it's for: van and car travelers who want a light rechargeable toilet with push-button sealing and no plumbing. Who should skip it: owners who want a true composting toilet or a unit that needs no charging.
Its Solar Score of 9.4/10 comes from performance 26/35, build 20/25, value 20/25, safety 4/10 and warranty 0/5: 70 of 100 points, placed on our 9.2 to 9.8 scale.
Key Specifications
| Battery | 5200mAh rechargeable |
|---|---|
| Uses per charge | 70 to 100 uses |
| Size | 17 x 16 x 11 inches |
| Support | Up to 330 pounds |
Taken from the seller's listing on 14 November 2026. Capacity and output figures are rated by the manufacturer.
Safety and Warranty
What this listing states. Stainless steel support legs, sealed waste bags with coagulant pouches, so safety scores 4 of 10. No warranty term, so warranty scores zero. See How We Pick.
Follow the manual. Connect and use the product as the maker describes, stay within every stated rating, and read the manual before first use.
This is general buying information, not professional advice. Follow each product manual and local rules, and see our Safety Disclaimer.
As an Amazon Associate I earn from qualifying purchases.
More picks to compare
Nature's Head Composting Toilet5 year warranty and huge capacity for 2 people using full timeCheck on Amazon- OGO Origin Compact Composting ToiletCompact composting toilet with a 15in footprint for van, RV and boatCheck on Amazon
- TRELINO Evo L Composting Toilet2X 2.6 gal capacity in a 13 x 15.4 x 16.9 inch bodyCheck on Amazon
- Nature's Head Foot-Spider ToiletSelf-contained composting toilet with foot-spider handleCheck on Amazon
- TRELINO Evo M Composting Toilet1.3 gal and 2.1 gal capacity in a 13 x 15.4 x 14.2 bodyCheck on Amazon
Numbers side by side
| Toilet | Solar Score | Type | Capacity | Footprint | Warranty | Amazon |
|---|---|---|---|---|---|---|
| TRELINO Evo S Composting Toilet | 9.7/10 | Urine-diverting | 1.2 gal urine, 1.6 gal solids | 13 x 15.4 x 11.7 inches | 2 Year Manufacturer | View on Amazon |
| OGO NOMAD Composting Toilet | 9.6/10 | Urine-diverting | 8-gallon bags | 15.4 x 13.0 x 12.38 inches | Not stated | View on Amazon |
| Laveo Dry Flush Toilet | 9.5/10 | Dry flush | 15 flushes per cartridge | 20.0 x 16.0 x 18.0 inches | 2-Year Limited Warranty | View on Amazon |
| Xastro Composting Toilet Kit | 9.4/10 | DIY urine-diverting kit | No container included | 14.4 x 10.9 in opening | 1 Year | View on Amazon |
| Modiwell LE-310 Dry Flush | 9.4/10 | Dry flush | 70 to 100 uses per charge | 17 x 16 x 11 inches | Not stated | View on Amazon |
We copied each rating from the seller’s listing as the brand states it; data date 14 November 2026.
Where the points went
The Solar Score weighs performance, build, value, safety and warranty. For a van toilet, safety means stated features that keep waste and odor contained, such as urine diversion, sealed cartridges and sturdy support, while performance means how well the stated capacity and footprint fit van use. The TRELINO Evo S, the Laveo and the Xastro state a warranty term, and the TRELINO Evo S and the Laveo state a 2 year term. How we pick explains the weights.
| Product | Solar Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| TRELINO Evo S Composting Toilet | 9.7 | 30 | 22 | 21 | 5 | 3 |
| OGO NOMAD Composting Toilet | 9.6 | 32 | 21 | 22 | 5 | 0 |
| Laveo Dry Flush Toilet | 9.5 | 23 | 21 | 20 | 5 | 3 |
| Xastro Composting Toilet Kit | 9.4 | 23 | 20 | 19 | 3 | 2 |
| Modiwell LE-310 Dry Flush | 9.4 | 26 | 20 | 20 | 4 | 0 |
We place weighted points on a scale whose ends are 9.2 and 9.8. Because the mapping is straight, a unit with more points never shows less.
How to choose the best composting toilet for van
Start from footprint, not capacity
Footprint decides the fit before capacity does. The TRELINO Evo S measures 13 by 15.4 inches at the base, the OGO NOMAD measures 15.4 by 13.0 inches, and the Modiwell measures 17 by 16 inches, so all three sit on a small patch of van floor. The Laveo needs 20.0 by 16.0 inches, which suits a larger build or a fixed spot in a tiny home. Measure the clear floor between the bed platform and the door before ordering, and see our best composting toilet for cabin picks if the same toilet will also serve a cabin.
Composting, dry flush or kit
The picks fall into groups: urine-diverting composting toilets, dry-flush toilets, and a kit. The TRELINO Evo S and the OGO NOMAD are urine-diverting composting toilets that separate liquids and solids with no power and no plumbing. The Laveo and the Modiwell are dry-flush toilets that seal waste in bags or cartridges instead of composting it, which suits owners who want no medium and no emptying routine beyond swapping a cartridge or bag. The Xastro is a kit that builds a dry toilet from your own wooden box, which suits a cabin or shed more than a compact van. If you are weighing a cassette instead, see our composting toilet vs cassette toilet guide, and see our portable toilet vs composting toilet guide for the portable side of the choice.
| Toilet | Type | Capacity |
|---|---|---|
| TRELINO Evo S | Urine-diverting | 1.2 gal urine, 1.6 gal solids |
| OGO NOMAD | Urine-diverting | 8-gallon bags |
| Laveo Dry Flush | Dry flush | 15 flushes per cartridge |
| Modiwell LE-310 | Dry flush | 70 to 100 uses per charge |
| Xastro Kit | DIY kit | No container included |
Match capacity to trip length
Capacity decides how often you empty, so match it to the trip. The TRELINO Evo S holds 9 to 11 liquid uses and 6 to 8 solid uses across its containers, and the Laveo cartridge is good for 15 solids flushes, or 28 flushes with Pee Powder. The Modiwell supports 70 to 100 uses on one full charge, with 2 rolls of bags at 30 uses per roll in the package, so longer trips still need spare bags. The OGO NOMAD works with 8-gallon bags, so pack spares for the trip length you plan.
Read the warranty lines closely
Coverage varies more than the toilets do. The TRELINO Evo S states a 2 Year Manufacturer warranty, the Laveo states a 2-Year Limited Warranty, and the Xastro states 1 Year. The OGO NOMAD and the Modiwell state no warranty term. The Laveo maker gives warranty terms of 2 years and 1 year on parts and electronics, so read that line before ordering.
Sizing Notes
- Measure the floor space first: the Laveo needs 20.0 by 16.0 inches, while the TRELINO Evo S needs 13 by 15.4 inches.
- Match container capacity to trip length: the TRELINO Evo S holds 1.2 gallons of urine and 1.6 gallons of solids, and the Modiwell supports 70 to 100 uses per charge.
- Check power needs before ordering: the OGO NOMAD needs no electric power, while the Modiwell needs a 14V/2A charging cable and the Laveo ships with a battery and charger.
- Match bags and cartridges to the model: the OGO NOMAD works with 8-gallon bags, and the Laveo uses cartridges good for 15 solids flushes.
FAQ: power away from the grid
What are composting toilets?
A composting toilet separates liquids and solids so waste can be managed without water, chemicals or a dump station. The urine-diverting picks here, the TRELINO Evo S and the OGO NOMAD, keep the two apart by design, and the Xastro kit builds the same separation into a wooden box.
Do composting toilets for vans need power?
The urine-diverting picks here need no electric power: the OGO NOMAD states no electric power or plumbing, and the TRELINO Evo S works without chemicals or water. The dry-flush Modiwell is the exception, with a 5200mAh battery that supports 70 to 100 uses per charge.
What size composting toilet fits a van?
The most compact pick here is the TRELINO Evo S at 13 by 15.4 by 11.7 inches, followed by the OGO NOMAD at 15.4 by 13.0 by 12.38 inches. The Laveo measures 20.0 by 16.0 by 18.0 inches, so measure the floor space before ordering.
How often do you empty a composting toilet for van use?
It depends on capacity. The TRELINO Evo S holds 9 to 11 liquid uses and 6 to 8 solid uses before its containers need emptying, and the Laveo cartridge is good for 15 solids flushes. The Nature’s Head in the more picks states that 2 people using full time empty every 4 to 6 weeks.
Which pick here states the longest warranty?
The Nature’s Head in the more picks states a 5 Year Warranty. Among the five main picks, the TRELINO Evo S states a 2 Year Manufacturer warranty and the Laveo states a 2-Year Limited Warranty, while the Xastro states 1 Year.
Related solar guides
See every RV and Van Life guide and all Emergency Prep guides. Also see our best composting toilet for cabin. Also see our composting toilet vs cassette toilet. Also see our portable toilet vs composting toilet.
More picks: best emergency preparedness gear, what is emergency preparedness, best flashlight for emergency preparedness.
