Introduction
Living in a tiny home is one of the smartest moves you can make — less space, lower bills, and a smaller footprint on the planet. But there's one question that stops a lot of people in their tracks before they ever pour a foundation or park a trailer: what do I do about the bathroom? Traditional flush toilets require a septic connection or municipal sewer hookup, and in many tiny home situations, that's either impossible, expensive, or completely off the table.
That's where composting toilets come in. Designed to work without water or a sewer connection, they're a practical, odor-free, and surprisingly easy solution for anyone living off-grid — or simply wanting to cut their water use dramatically. The right model can fit a compact bathroom, handle daily use with minimal maintenance, and last for years with simple care.
The good news: the market has come a long way. Whether you're building a stationary tiny home, parking a converted van, or setting up a remote cabin, there are excellent options available today from proven brands. This guide breaks down the best composting toilets for tiny homes in 2026 so you can make the right call for your setup.
What to Look for in a Composting Toilet for a Tiny Home
Before diving into specific models, it helps to know what actually matters when you're shopping for a composting toilet in a small-space setting.
Size & Footprint
Tiny home bathrooms are, well, tiny. You want a unit that fits comfortably without eating up every square inch. Self-contained models — where everything happens in one unit — are the most popular choice for compact spaces.
Self-Contained vs. Remote (Split) Systems
- Self-contained models house the composting chamber directly under the seat. Great for smaller homes with limited under-floor space.
- Remote/centrex systems have a separate composting unit installed below or away from the toilet — ideal if you have a dedicated utility closet or want a more traditional toilet look.
Electric vs. Non-Electric
Some composting toilets use a small fan and heating element to accelerate the composting process and manage moisture. Others are entirely non-electric. For off-grid tiny homes running on solar, low-wattage electric models are usually no problem — but non-electric options give you maximum independence.
Capacity
How many people will use it daily? Most residential composting toilets are rated for 1–4 people. High-capacity systems like the Sun-Mar Centrex line can handle larger households or vacation use.
Urine Diversion
Many modern composting toilets separate liquid from solid waste. This keeps the composting chamber drier and dramatically reduces any odor. Nature's Head models are well known for this feature.
The 4 Best Composting Toilet Brands at PowerGen Store
PowerGen Store carries four trusted composting toilet brands, each with a distinct design philosophy. Here's how they compare:
Nature's Head — Best for RVs, Vans & Compact Tiny Homes
Nature's Head is one of the most recognized names in the composting toilet world, especially among the van life, RV, and tiny home communities. Their toilets are built around a urine-diverting design that separates liquids and solids, which is the key to keeping things odor-free.
Available at PowerGen Store:
- Nature's Head Spider Handle Toilet
- Nature's Head Foot Spider Handle Toilet
- Nature's Head The Weekender Toilet — (compact size, ideal for smaller spaces)
- Nature's Head Vehicle Kit — (designed specifically for RV and van installs)
- Nature's Head Structure Kit — (for permanent structure builds)
- Nature's Head Emergency Preparedness Kit
Why tiny home owners love Nature's Head:
- Urine diversion keeps solids dry and odor minimal
- Compact, self-contained design fits most tiny home bathrooms
- No water needed — fully off-grid ready
- Durable construction built for marine and mobile environments
Shop all Nature's Head composting toilets
Sun-Mar — Best for Permanent Tiny Homes & Higher Capacity
Sun-Mar is a Canadian brand with decades of experience in composting toilet design. They offer both self-contained and remote (Centrex) systems, making them the most versatile brand in the lineup — especially for tiny homes built on a foundation rather than wheels.
Self-Contained Options at PowerGen Store:
- Sun-Mar Compact — (low-profile bio-drum design, space-saving)
- Sun-Mar SpaceSaver — (upright self-contained, ideal for tight bathrooms)
Remote/Centrex Systems:
- Sun-Mar Centrex 1000 — (for 1–2 people, remote composting unit)
- Sun-Mar Centrex 2000 — (high-capacity, 2–4 people)
- Sun-Mar Centrex 3000 — (continuous-flow for larger households)
- Non-Electric versions also available for all Centrex models
Accessories also available:
Why tiny home owners love Sun-Mar:
- Non-electric Centrex options for true off-grid living
- Bio-drum design speeds up composting naturally
- Remote systems allow a more conventional bathroom look
- Wide range of capacities for different household sizes
Shop all Sun-Mar composting toilets
Separett — Best for Scandinavian-Style Simplicity
Separett is a Swedish brand built on a "urine-diverting dry toilet" approach — clean, minimal, and elegantly simple. Their models are popular with tiny homeowners who want something that looks more like a conventional toilet but works without water or chemicals.
Available at PowerGen Store:
- Separett Villa 1255 — (full-size, residential use, great for permanent tiny homes)
- Separett Tiny — (compact model with urine tube, built for small spaces)
- Separett Weekend Prime — (lower-cost option for seasonal or part-time use)
Why tiny home owners love Separett:
- Sleek, modern look — doesn't scream "composting toilet"
- Urine-diverting system keeps the unit odor-free
- The Separett Tiny is designed specifically for space-constrained installs
- Weekend Prime is a budget-friendly entry point
Shop all Separett composting toilets
📦 MyBoxio — Best Portable/Modular Option
MyBoxio (also listed as Boxio) offers a modular, portable composting toilet system that's gaining popularity with the van life and compact tiny home crowd. With 5 products in the PowerGen Store lineup, it's worth a look for those who want flexibility and portability without a permanent install.
Shop MyBoxio composting toilets
Which Composting Toilet Is Right for Your Tiny Home?
Here's a quick guide to match your situation to the right solution:
| Your Setup | Best Pick |
|---|---|
| Van / RV / mobile tiny home | Nature's Head Spider Handle or Vehicle Kit |
| Compact stationary tiny home | Separett Tiny or Sun-Mar SpaceSaver |
| Full-size stationary tiny home | Sun-Mar Compact or Separett Villa |
| Off-grid, no electricity | Sun-Mar Centrex NE (Non-Electric) |
| Seasonal / weekend use | Separett Weekend Prime |
| Emergency / preparedness | Nature's Head Emergency Kit |
| Budget-conscious entry point | Separett Weekend Prime ($549) or Sun-Mar AF Waterless Kit ($168) |
Do Composting Toilets Work Well Off-Grid?
Absolutely — and in many ways they're better suited to off-grid living than traditional flush toilets. Here's why:
- No water needed. A standard toilet uses 1.6 gallons or more per flush. Composting toilets use zero.
- No sewer or septic required. Perfect for land without hookups.
- Low power draw. Electric models typically use a small fan — easily handled by even a modest solar setup. [INTERNAL LINK: Solar Generators at PowerGen Store]
- Low maintenance. Most models only need to be emptied every few weeks to a few months, depending on use.
If you're already running your tiny home on solar power, adding a composting toilet completes the off-grid picture. Your solar generator or battery system handles the small fan draw with ease.
Shop Solar Kits for Tiny Houses & Small Homes
FAQs About Composting Toilets for Tiny Homes
Do composting toilets smell? When properly maintained and ventilated, composting toilets have minimal to no odor. Urine-diverting models — like Nature's Head and Separett — are particularly effective at odor control because they keep the composting chamber dry.
How often do you empty a composting toilet? It depends on usage and model, but most residential units need emptying every 4–6 weeks for a 1–2 person household. Non-electric models may require slightly more frequent attention.
Are composting toilets legal in tiny homes? Regulations vary widely by state and municipality. It's always worth checking your local codes before installing. [EXTERNAL LINK: your state's department of health or environmental quality for composting toilet regulations]
Can they handle full-time use? Yes — models like the Sun-Mar Centrex and Nature's Head Spider Handle are designed for full-time residential use. Be sure to match the unit's capacity rating to your household size.
Ready to make the switch to off-grid living? PowerGen Store carries one of the most complete selections of composting toilets online — from compact units for vans and tiny homes to high-capacity remote systems for full-time residential use. Our team of off-grid Professionals are available Monday through Saturday to help you find the right fit.
Browse our full composting toilet collection at powergenstore.com.
Have questions? Call us at 845-202-2982 or email sales@powergenstore.com.
