6 Best Composting Toilet Systems – (Reviews & Buying Guide )

Are you concerned that you are flushing too much water, waste, pathogens and chemicals into the environment? Or do you want to save money from lower bills for electricity, water, and commercial fertilizer?

If this is the case, then good quality and well-functioning composting toilet like the top-rated one for 2020 – Nature’s Head Self Contained Composting Toilet with Close Quarters is the perfect choice for you.

Composting toilets are growing in popularity, as people are looking for more eco-friendly ways to live and ways to reduce their environmental footprints.

They are also popular because they can save tons of money from bills as they use no water and very little or no electricity, and at the same time produce safe manure which you can use for your green area, your ornamental garden, trees and shrubs, instead of commercial fertilizer.

And last but not least, they are becoming increasingly popular because they are extremely easy and cheap to set up and use. In fact, most of these toilets are very portable and so you can take them camping, traveling or vacationing with you too.

We have chosen the best composting toilets for 2020 for you, so if you are interested in investing in one of these ingenious products, read on to find out everything you need to know about these useful utilities.

Best overall

Nature’s Head Self Contained Composting Toilet with Close Quarters

This Nature’s Head Self Contained Composting Toilet is the latest design offered by the reputable manufacturer.

According to our research, this is the best composting toilet for 2020 for numerous reasons.

One of the best features of this top quality composting toilet is that unlike many of the other composting toilets, this one provides more comfort due to its full-sized seat and its normal average high frame. In fact, this is probably the most comfortable composting toilet being offered on the market right now.

The toilet has a full-sized, elongated seat which will make you feel as comfortable as using a traditional toilet. So, you can still enjoy the convenience of using a composting toilet without any uncomfortable bathroom sessions if you decide to pick this excellent composting toilet by Nature’s Head.

Its dimensions are 22 x 20.5 x 21.7 inches, and it weighs 28 lbs. which also makes it one of the lightest of this type of toilets available on the market as well. This means that you can set it up on any floor of your house.

The fact that it is self-contained makes it possible for setting this toilet up in campers, RVs, boats, trucks, in cabins, workshops, barns, yurts and everywhere you need even with minimal electricity and no plumbing.

Speaking of setting up, the self-contained composting toilet by Nature’s Head is very easy to set up and is sold with everything you will need for the installation including all stainless steel hardware.

Even if you have problems with its installation, the customer support of the US Company is very friendly and useful and will gladly assist you.

It is made in the USA and is sold with a 5-year warranty which covers all parts and any malfunctions.

The energy-saving composting toilet uses the minimal electrical power of 12 volts and wattage of only 0.72 watts.

It has a built-in low volume air circulation fan and a vent hose. The fan is located on the head of the reservoir system and will help recycle the air in the bathroom, which will leave it with a fresh and welcoming smell every time.

This excellent and comfortable composting toilet is perfect for use by two people full time, as well as by more people if you are planning to use it only on weekends in your camper, RV or anywhere else.

The toilet can be disassembled in a matter of seconds for easy and mess-free emptying.

We would like to remind you that Nature’s Head was established by two experienced sailors who have a goal to develop more comfortable and user-friendly composting toilets which can be used in all kinds of environments.

Being originally designed and made for marine use, you can expect that this superb composting toilet is made of sturdy materials and has a rugged design made to withstand all kinds of conditions and a lot of wear and tear.

It has two separate sides in the waste tank – one for urine and the other for solid waste. While the urine tank will need to be emptied more often, the solids will need to be emptied after 80 or more uses, because they begin composting very quickly.

This is great news because you will save time and effort, as well as have compost for your needs ready at all times. Plus, compost smells like earth, so here will be fowl smells too.

So, if you are looking for the best composting toilet to invest in, you should definitely consider buying the nature’s Head Self Composting Toilet with Close Quarters Spider Handle Design.

It feels like you are using a regular toilet, it doesn’t leave that unpleasant odor which other self-contained toilets do, it is durable, easy to set up, and comes with everything you will need to install it and start using it.

You can use it anywhere and have compost for your lawn, tree or plants handy at all times. So, you will be saving money for compost, for electricity, and for water.

Plus, this toilet comes with a 5-year warranty and excellent customer support so you can rest assured that you are making a very wise investment too.

The runner up

Separett Villa 9215 AC/DC

Although the Villa 9215 AC/DC composting toilet by Separett was released just last year, it has already gained huge popularity and a lot of fans.

This composting toilet requires no water, has urine-diverting, and can be easily used as an off-grid toilet anywhere.

It is smaller than our overall best choice for 2020, but the Villa 9215 is definitely the best compact composting toilet on the market right now.

Its size is 18 x 26.5 x 21.3 inches, and it weighs 47 lbs. so it can fit in tight spaces on camp, in a vacation cabin or at home.

But apart from the fact that it is smaller than a traditional toilet, there are other features which make this composting toilet one of the top choices.

It is very easy to set up because it is sold with absolutely everything you need to install it and start using it including a waste container with a lid as well as 10 compostable bags.

It can run on electrical, solar or on battery power and uses minimal amounts of either 12DC battery or solar or AC power. It has 2.5 watt wattage and consumption of just 06 kWh per 24 hours to support the venting of up to 25 feet.

The toilet is sold with the power adapter and battery cable you will need to connect it wherever you choose.

It also has a 12V fan which is quiet and works at fewer than 30 decibels and a concealing view screen. The fan helps remove the odors from the waste as well as dry it and compost it faster.

The modern composting toilet has a capacity for solid waste for 3 weeks for an average family. It diverts the urine and directs it from the tank to the drain directly, while the solids and paper end up in the liner bags for easy and suitable storage.

The toilet uses absolutely no water.

This makes it perfect to use off-the-grid as well as on-grid anywhere.

You will also be making useful compost without any hassle for your trees, plants, and others.

This top-quality composting toilet is offered with a 5-year warranty and a 3-year warranty for the fan, for peace of mind that everything will be ok even if something goes wrong with any of the parts of it the toilet malfunctions.

With a long warranty, and with the variable power options, along with the very well designed waste management system, the Villa 9215 is most definitely among the top best composting toilets for 2020!

The rest of the best composting toilets for 2020

Nature’s Head Dry Composting Toilet with Standard Crank Handle

Like our overall top choice for 2020, this composting toilet by Nature’s Head is one of the best options if you are looking for an ecological and easy to set up own waste management and composting system for your home, tiny home, cabin, workshop, boat, RV or other place on or off-grid.

It is 19.8 x 20.8 x 20.5 inches in size and weighs a mere 27.2 lbs. when empty.

This is also known as a dry toilet and has a nifty foot crank handle which speeds up the composting process of the solid waste.

The toilet has a sturdy construction and is very user-friendly, and easy to set up anywhere, even in the harshest of conditions.

It is sold with the stainless steel hardware for installing it as well as a power cable a fuse and fuse holder for 12 volts, a fan hookup, a 5-foot hose, a vent flange and a liquids bottle with a cap.

The Dry composting toilet by Nature’s Head is odorless, very light, easy to install and maintain, and uses no water. It also uses minimal amounts of 12V power which can be supplied by batteries, solar power or via an adaptor by a power outlet.

This self-contained composting toilet diverts urine into a liquids bottle with a cap and turns the solid waste into compost, so you can use it for fertilizing the trees, lawn and other inedible plants.

The crank agitator allows for fast composting which means less smell, more compost and rarer emptying of the tank.

So, if you want a reasonably proceed, top quality and easy to set ecological toilet for your home or elsewhere, on or off the grid, the Nature’s Head Dry Composting Toilet with a Standard Crank Handle is among the top choices and the best offers available for 2020.

Related Content: The Best Dual Flush Toilets In 2020

Nature’s Head Composting Toilet with Spider Handle

If you are still not sure whether you are ready for using a compost toilet, or if you are not certain about the model to pick, then you should start off with the Nature’s Head Composting Toilet with Spider Handle. The reason is that it is offered with a 100% full refund satisfaction guarantee.

And then when you decide to keep it, you will be happy to know that you will have another 5 years of warranty for this efficient and top quality toilet.

The composting toilet by Nature’s head is a great option for cabins, guest rooms, RVs, campers, boats or anywhere else.

It eliminates the need of water and plumbing, uses minimal amounts of 12V electrical power which you can easily get from a battery or solar panel, and will save you massive amounts of investments and space for installing a tank or septic system.

You can also plug it in a regular 110V power outlet with a transformer too if you prefer.

This toilet is extremely easy to install and very easy to maintain.

Its size is 17.8 x 17.8 x 21.5 inches, and it weighs 28 lbs.

The toilet has the capacity to contain about 80 uses before it needs emptying, which is enough for two people to use during their summer vacation.

Plus, it turns waste into organic compost which is dry, odor-free and safe for use outdoors. Thanks to the spider agitator handle which you need to turn only once in each direction after use, you will turn the solid waste into compost faster.

The urine is diverted into an included liquids bottle which comes with a convenient cap for spill-free and mess-free emptying.

It is incredibly easy to install even if you do not have any mechanical skills, and it comes with all you need to set it up and begin using it, including a detailed installation and start-up guide.

The toilet has a ventilator and also a 5-foot hose of 1 ½ inches for the ventilation, so you will never need to bear with the nasty odor which some other self-contained toilets have.

It is comfortable to use, and easy to keep clean by using a bottle with some white vinegar and water to spray the bowl after use.

Overall, this odorless, lightweight and eco-friendly and money-saving toilet is a perfect option if you want to live a greener lifestyle and make your own organic compost.

Sun-Mar Excel Non-Electric Self-Contained Composting Toilet, Excel-NE

If you are looking for ways to minimize your ecological footprint be it off the grid or on it, this premium quality composting toilet by Sun-Mar is one of the best options you can get.

It is completely 100% eco-friendly and uses no electricity and no water, plus you will release no chemicals or wastewater when you use it.

The Sun-Mar Excel is 36 x 36 x 28 inches in size and weighs 90 lbs. so it is heftier than many of the others, but there is a good reason for that.

The toilet is completely self-contained and has a large waste drum, which allows it to be rated for full-time use by average families of 3-4 people, or for more for weekends only which makes it one of the highest capacity composting toilets on the market.

The toilet is NSF/ANSI certified and thanks to the fact that it utilizes no electricity or plumbing at all is one of the easiest composting toilets to install too.

But don’t think that the lack of an electrical ventilator will make this toilet stinky. It has a 4-inch vent on the top which can be installed above the roof for good air circulation and ventilation.

If you are worried about the ventilation, you can still install the optional 12V fan which comes with the toilet too.

The toilet has a sturdy and detachable footrest for added comfort during use, as well as for easy access to the finishing drawer when it is time to empty it.

Thanks to its huge capacity, this self-contained composting toilet can easily be used in permanent residences as well as for light commercial use.

This pollution-free and odor-free composting toilet is sold with a 5-year warranty for the fiberglass toilet, and a 3-year warranty for the parts.

It is the best choice for all people with ethical issues with wasting water, power and releasing chemicals and pollutants into the environment.

Sun-Mar Excel Self-Contained Composting Toilet, Excel

The Sun-Mar Excel is the epitome of the term self-contained composting toilet. It is 100% non-polluting, and not only will you have a zero footprint on the environment when you use it, but you will also be producing manure which can improve your soil and plants, without any unpleasant smell, pathogens or other harmful elements.

The toilet uses no water and features the reliable Bio-Drum with a capacity of handling full-time use by 3-4 people and weekend use by up to 8 people to convert the waste into useful and environmentally friendly compost.

The dimensions of this eco-friendly composting toilet are 33 x 22.5 x 33 inches and weighs 60 lbs.

You can easily set it up and use in your home, or in your vacation cabin, or just about anywhere you prefer, as it comes with all essential items and accessories for installation and use.

The toilet comes with an emergency drain, in case of a power outage or when the unit will be used heavily.

The included venting kit is also easy to install and will dry the waste and evaporate the liquid to speed up the composting process.

It also has a detachable footrest for pulling out the finishing drawer and for added comfort.

The toilet is available in white or bone colors.

As a whole, for people who are concerned for the environment and who want a clean and effortless alternative to a traditional flushing toilet or a chemical one, the Sun-Mar Excel is an outstanding option.

Everything you need to know about buying a composting toilet

Choosing the best composting toilet is not an easy task, because it is a serious investment and your future comfort relies on it.

Here is a brief overview of the features to look for when shopping for a composting toilet, and the pros and cons of the different types of these toilets available on the market.

What exactly is a composting toilet?

In simple terms, a composting toilet is a toilet which collects all human waste and the toilet paper and turns it into compost which you can use to safely fertilize your plants, lawn or trees.

Composting toilets don’t use water and some of them don’t use electricity so they are eco-friendly and money-saving as well.

These toilets are excellent for people interested in minimizing their footprints on the earth and minimizing the pollution and waste of resources.

They are also easy alternatives to traditional toilets for off the grid dwellings and situations.

How does a composting toilet work?

These special toilets are designed and made to help recycle human waste into compost by utilizing the natural decomposing and evaporation processes.

Since about 90% of the human waste is made of water, most of it evaporates naturally or with the assistance of a fan through the vent system of the toilet. The vent can be electrical or non-electrical.

Some of the composting toilets have urine diverters and separate bottles for liquid waste.

This leaves the solid material which converts into dry, naturally decomposed manure.

These exact same natural processes are also used in the traditional garden composters.

Providing that there is a correct balance between moisture, heat, oxygen and organic material is essential for creating the best environment for the bacteria which transforms the solid waste to manure to live and thrive.

The correct balance also ensures that the wastes are completely decomposed and that the process is odorless.

This also ensures that the manure produced is free of pathogens or viruses as well.

The nutrient-rich manure produced by composting toilets can be applied around trees and plants and will eliminate the need for purchasing commercial fertilizer.

Toilets like these also help preserve the quality of the local water and save water, as well as electricity.

As a whole, a good quality composting toilet should be able to:

  • Compost human waste and toilet paper quickly and without an odor
  • Ensure that the end product is safe and easy to handle
  • Evaporate or drain the liquid and retain only the solid waste and materials
  • Do all of this without water and with minimal electricity

The pros and cons of composting toilets

Of course, nobody and nothing is perfect, so you can expect that composting toilets do have their cons as well as their pros.

Let’s take a look at the main advantages and disadvantages of composting toilets.

Pros of composting toilets

  • They are good for the environment

This is no doubt one of the main reasons why people are looking to switch from traditional toilets to self-contained composting toilets. They do not waste water and do not flush chemicals and other waste back into the environment. Also, these toilets use no or minimal amounts of electricity, which can easily be derived from solar panels.

So, we can say that these appliances are 100% pollution-free and eco-friendly.

  • They are cheaper and faster to install than traditional toilets

Due to the fact that composting toilets do not require plumbing, an elaborate installation, complicated electrical connections, expensive and large-sized septic systems, and tanks, installing these units is not only very easy but it is also virtually free.

The best quality composting toilets usually are sold with everything you will need to install and start using them right away.

  • You can install them anywhere – on or off the grid

This easy installation also allows for installing these wonderful toilets on and off the grid, and wherever you like, without the need for plumbing or electricity. This makes them superb solutions for vacation cabins, tiny homes, RVs, campers, boats, trucks, workshops, barns, and others. But many of them can work seamlessly as a full-time residential toilets as well.

Also, you can take your toilet with you if you move or go on a longer trip easily.

  • They require minimal maintenance

The toilets which have separate liquid bottles and tanks do need to be emptied more regularly, but the solid waste composted in the tanks of the good quality composting toilet will dry up and decompose quickly, so there will be space for a lot more solid waste than a liquid one.

Plus, when it is composted, the solid waste will be dry, odorless and safe to handle.

Otherwise, to keep the toilet clean, all you need to do is spray some white vinegar solution with some essential oils on the bowl after each use, and this will be pretty much it.

  • They lack the odor of other self-containing toilets

Because of their well-designed ventilation systems, and their reliance on the natural process for decomposing waste, these toilets tend to smell much less than other portable or self-containing toilets.

  • You can make your own compost

Yes, you can recycle human waste into compost, and you can use it or dispose of in accordance to your local regulations. If allowed, you can safely use it to fertilize all inedible plants, your ornamental garden, your lawn, around fruit trees or add it to an established compost pile in your area.

  • They come with excellent warranties

Most of our top picks for the best composting toilets for 2020 are sold with long warranties, which will let you rest assured that you are making a safe long-term investment and that you can rely on support by the manufacturers for years ahead.

Cons of composting toilets

  • They can be uncomfortable to use

Some of the toilets of this type have a height and toilet seats which are non-standard which may not be comfortable for taller or larger people. Fortunately, some of the models we have picked for you are standard sized and provide ultimate comfort.

  • They do not save too much space

Some composting toilets with large capacity drums and tanks can actually take up more space than traditional toilets, even though they do not require plumbing.

The good news is that there are more compact models which will easily fit in small areas, tiny homes and other limited spaces.

  • They do have limited capacities

No matter the model you choose, the composting toilet does have a certain capacity of people it can handle. It is important to choose a toilet which fits your needs – the number of people who will be using it and how often it will be used (full time, seasonal or weekend only) in order to ensure that you end up with a well-working composting toilet and not a messy unit you will have to deal with.

  • They are safe from flooding, sewage failures and excellent for disaster relief

These toilets are self-contained and thus are not affected by catastrophic failures and flooding of sewages. Also they are the fastest and most cost-efficient way to restore normal and safe sanitization in cases of natural disasters when the traditional treatment infrastructure has been destroyed.

The different types of composting toilets

Our best picks are all self-contained composting toilets, but there are some toilets of this type which can be connected to a central composting location as well. This means connecting the waste tank with a larger reservoir located outside or elsewhere.

Self-contained composting toilets

These are suitable for private use, for smaller locations, and for smaller groups of people.

They can be electric and non-electric. The electric ones usually have larger waste drums or tanks giving them larger capacities because the vents speed up the decomposing process thus making space for more waste faster.

Self-contained composting toilets are economical, easy to clean, don’t require plumbing and work better even in the colder seasons. They usually have a sleeker and high gloss finish and are more inviting and odorless.

Central composting toilet systems

These are more similar to traditional toilets and have two main components – the toilet itself and a composting place located in the basement or outside.

These can be used by larger groups of people because they can compost and store more human waste. They are also cheaper to install since they do not have separate tanks.

Still, you will need to have a central composting reservoir set up somewhere in the building or near it.

These central composting toilets can be waterless and rely on a vacuum airflow system to collect the waste or have a pint flush system which utilizes a water seal and flushing liquid to get rid of the waste.

Features to look for when shopping for a composting toilet


The capacity of the composting toilet is actually how much waste the unit can store and compost without overflowing.

Usually, the manufacturers measure the capacity of the toilets in the number of people who can use them safely per 24 hours or only on weekends.

If you are looking for a composting toilet which you will be useing only for vacations, then you can easily buy one with a smaller capacity.

On the other hand, if you are looking for one which you will be using as a full-time toilet, it is recommended to look for one with a larger capacity, especially if you have a big family.

Choosing the toilet with the appropriate capacity will save you the time and hassle of dealing with overflowing and messes, and will ensure that the toilet works properly and composts the waste as it is supposed to do.


Unlike with traditional toilets, you will need to manually remove the compost from the drum or tank regularly to prevent overflowing. Also, with the toilets which have separate liquid bottles for the urine, you will need to remove and empty those too even more often.

Otherwise, taking care of these toilets is not a big hassle. Spraying the toilet bowl with vinegar, or wiping it with a piece of toilet paper after use can be enough to keep it clean and sanitized without the use of harsh chemical detergents.

Size and weight

Of course, the dimensions of the composting toilet are one of the most important factors to keep in mind when choosing the best one for you. You need to make sure that it will fit the space you have intended it for, along with the tank and ventilation systems which come attached with it.

Plus, you need to make sure that the toilet will be comfortable for you and the other people who will be using it too.

Some of the toilets have smaller seats and are lower than others, so take the time to measure your space, so that you buy the most appropriate one for your available space.

The weight of these toilets is also essential, especially if you plan on using them on higher floors, in RVs, campers, and others.

Lighter composting toilets are much more suitable for travel, camping and for setting them up in upstairs areas or rooms.

Ease of installation

Composting toilets are much easier to install than traditional ones because they do not need to be connected to plumbing, sewage, to be sealed, etc.

With self-contained composting toilets, all you need to do is anchor them safely in place, and ensure that the ventilation pipe is connected properly.

These toilets can easily be installed without professional help, and good quality ones like the ones on our list come with absolutely everything you will need for setting them up and starting to use them out of the box.

Electrical or not

This one depends on where you are planning to use the toilet. If you have electricity, solar panels or batteries, it is a good idea to invest in an electrical composting toilet. Electrical power can help speed up the composting process, minimize the odor and help increase the capacity of the waste drum.

On the other hand, if there is no available electricity, or you want to set the toilet up completely off-the-grid, then you can go for a non-electric one. These are designed to work well and compost properly even without electricity by using only natural ventilation.

Their safety

The safety concerns for composting toilets can be about the safe functioning of the composting processes, as well as about the safety of the electrical connections.

If you have a malfunctioning composting toilet, you may end up with unsafe compost full of pathogens, viruses and other potentially harmful microorganisms. The best way to ensure that your toilet is safely composting is to buy a good quality toilet and to take care to maintain it and empty it out regularly.

As for the electrical connections, you will need to regularly check them out in order to prevent unsafe electrical wiring from injuring somebody.

The price

These toilets come in a wide price range. In general, they are more expensive than traditional toilets because they are more difficult to build. Then again, a composting toilet will pay itself back pretty quickly, because you will be using no water, very little or no electricity and you will not be buying commercial fertilizer.

The warranty

Since you will be making a rather serious investment by buying a composting toilet, it is essential to pick one which has a warranty of some kind. Of course, the longer the warranty – the better for you, in case something malfunctions and needs to be repaired or replaced in the near future.

Final words

So, if you are really interested in minimizing the footprint you are leaving on the environment, and you are looking for ways to save energy, water, and money, you should opt for one of these excellent quality composting toilets we have chosen for you.

They are superb for keeping the environment cleaner, as well as for making your own fertilizer.

With a toilet like one of these, you can rest assured that you are not releasing any harmful chemicals and waste back into the environment.

Also, you can use the compost to fertilize your green spaces, ornamental gardens and trees.

These toilets are mobile, easy to install so you can use them anywhere and install them just about anywhere too without any complicated connections and installations needed.

They are portable, comfortable, eco-friendly and money-saving.

With proper and regular maintenance, these wonderful utilities can work for decades and more without the need for any serious repairs or replacements.

Good luck with your purchase, and we hope you enjoy all of the benefits of using one of these composting toilets soon!


Composting toilet – Wikipedia

How Do Composting Toilets Work?

7 Reasons to Consider a Composting Toilet – Countryside

What to do with composting toilet waste | Ecoflo

What Is a Composting Toilet and Does It Work? | Angie’s List

Last update on 2020-09-20 at 05:43 / Affiliate links / Images from Amazon Product Advertising API