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EXCEL NE Self-Contained High Capacity Non-Electric Unit
Excel NE self contained composting toilet by Sun-Mar

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Product Code: EXCEL_NE
Our Price: $1,925.00

Availability: Usually Ships in 1 to 2 Weeks

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Sun-Mar Excel NE

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How to Operate the Sun-Mar Excel NE
Product Features
Technical Specs
Return Policy
Customer Reviews For This Product

The Sun-Mar EXCEL NE is a non-electric version of the Sun-Mar EXCEL, the highest capacity self-contained toilet and the preferred self-contained model for heavy cottage or continuous residential use. The EXCEL NE was first launched in 1981, and it has long been the standard toilet for those living off the grid. Because it is a non-electric unit, the EXCEL NE does not have a fan or heater, like the EXCEL electric unit does. Odorless operation is achieve by a 4" vent mounted at the top rear of the unit which acts like a chimney on a wood stove by drawing air into the toilet and maintaining a partial vacuum within the unit. The EXCEL NE is also waterless, which means it's easy to install because there's no plumbing required. There is a 1" drain at the rear of the unit that should be connected.

If the EXCEL NE is going to be used residentially or heavily, or if it's in a location that may be subject to downdraft, an optional 12 Volt fan should be installed in the vent stack. This fan draws 1.4 watts and can be powered by a solar panel and/or 12 Volt battery. The optional 12 Volt fan is sold separately.


Sun-Mar's EXCEL family of self-contained composting toilets are the world's only self-contained units to be NSF certified to operate odorlessly and producing a clean, dry compost. When you purchase an EXCEL, you are literally purchasing the unit that sets the standard for self-contained composting toilets!

Operation of the EXCEL NE:
  • For initial start up, add some Compost Sure to the Bio-Drum™ together with some Microbe Mix.
  • The composting toilet will process all kinds of toilet paper, so no need to change your brand.
  • For ongoing operation, add Compost Sure as specified in the product instruction manual. Rotate the drum 5 or 6 full revolutions, every 2-3 days when in use. When using for shorter periods, just rotate before you leave.
  • When the Bio-Drum™ is half to 2/3 full, you will need to move some of the compost to the finishing drawer by releasing the drum lock and rotating the drum backwards. This quick clean process causes the finished compost to dropinto the finishing drawer. You never come into contact with fresh material.
  • The compost should be left for at least 4 weeks so it can finish and sanitize. In the finishing drawer, it will be isolated from contamination by fresh material in the toilet. Once 4 weeks have passed, you can remove the finished compost from the finishing drawer at any time. The drawer is easily pulled out by hand; no tools are needed to open it.
  • The finished product is clean, dry, non-offensive, and sanitary. You can add it to your flowers or around your bushes. It will look and smell just like any other regular compost that might come out of a garden composter.

Composting Toilet

  • Self-contained non-electric, waterless unit
  • Designed for use in areas with no continuous electric supply
  • Features large, patented Bio-Drum™ for composting capacity of 5 adults (weekend use) or 2 adults (residential and continuous use)
  • NSF tested and certified for a continuous 6 months at maximum rated capacity (click here to view NSF certification)
  • No fan or heater present
  • 4" Vent at top rear of the unit that maintains a partial vacuum to ensure odorless operation at all times
  • If needed, an optional 12 Volt fan (sold separately) can be added to improve venting
  • Two color choices available, Bone or White
  • All Sun-Mar units feature 3-chamber technology:
    • The patented Bio-Drum™, the location where compost is mixed and aerated
    • The Evaporating Chamber, where excess liquid is evaporated
    • The Finishing Drawer, the location where finished compost is kept separate from unfinished material

Composting Toilet

Technical Specs:
  • View Dimensional Line Drawing
  • View Product Instruction Manual
  • Composting Capacity:
    • Residential & Continuous Use: 2 Adults or a Family of 3
    • Weekend & Vacation Use: 5 Adults or a Family of 7
    • Please note, family numbers above include both adults and small children
  • If unit is going to be used residentially or heavily, or if installed in an area subject to a downdraft, we recommend that you also purchase the optional 12 Volt fan (1.4 watts) fan (sold separately) to increase airflow through the unit.
  • Vent & Drains:
    • Vent Pipe: 4" Sewer pipe
    • Drain: 1" O.D. (Note: drain hookup is required, because the evaporating capacity can vary)
  • Dimensions:
    • Unit Dimensions: 22-1/2" W x 32-1/2" D x 31-1/2" H
    • Shipping Carton Dimensions: 35-1/2" L x 28" W x 36" H
    • Height of Footrest (when in use): 10-1/2"
    • Height (footrest to seat): 17"
  • Rough-in Measurements:
    • Depth required to remove finishing drawer: 46"
    • Vent outlet center distance from left side (looking at back of unit): 11-1/4"
    • Height to top of vent outlet assembly: 35"
    • Depth with footrest: 41-1/4"
  • Unit shell is constructed of durable fiberglass and ABS plastic
  • Product Weight: 50 lbs.
  • Shipping Weight: 95 lbs.
  • This product ships via common carrier truck line from Tonawanda, New York
  • Limited Manufacturer's Warranty:
    • 5 Years on shell
    • 3 Years on all other parts
    • For complete details, please see our Warranty Information page

Return Policy:
Please note, there is a 20% restocking fee on all returns of this item. For complete details, please see our store Return Policy page.

NOTE: Free Ground shipping for contiguous United States (lower 48 states) only. Sorry, we do not ship outside the contiguous United States (lower 48 states).

Model: Excel NE, installed 1998
Location: Installed at Thomas Lake, WA
Reviewed By: Nancy Ressa

We are very happy with the Sun-Mar toilet. We have had as many as 30 people use it on weekends. We have been using it 5 years with no problems. It is everything you said it would be. We are pleased.

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Accessories for this product...
Compost Sure, 8 gallon bag
Our Price: $49.99

Compost Sure for Sun-Mar Composting Toilets
Compost Quick Cleaning Spray, 16 oz. bottle
Sale Price: $22.00 CLOSE OUT PRICING

Compost Quick Cleaner for Sun-Mar Composting Toilets
12 Volt 1.4 Watt DC Fan
Our Price: $69.50

12 Volt 1.4 Watt DC fan assembly for Sun-Mar Composting Toilets
Microbe Mix, 17 oz. jar
Our Price: $29.99

Microbe Mix for Sun-Mar composting toilets

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