Sun-Mar Excel NE Composting Toilet
The Sun-Mar Excel NE Composting Toilet is a dry composting system.
The Sun-Mar Excel NE is a self-contained composting dry toilet made for off the grid circumstances. The excreta is dried/evaporated and composted within the units 3 chamber drum for continuous composting. It is sized for household use.
North America, Argentina, Australia, Chile, China, Europe, Ghana, Greece, Hong Kong, Israel, Japan, Mongolia, New Zealand, Panama, Puerto Rico, Taiwan.
Goal 6: Clean water and sanitation
Households and vacation homes in areas with little access to water and/or plumbing.
The toilet is constructed by hand by Sun-Mar. A video with an example of how a toilet is produced can be found here.
Sun-Mar has an international patent on technology.
Direct sales, online and in-stores
Type of toilet
Method of evacuation
How the fecal sludge is stored
The holding volume of the containment
Time until emptying is estimated to be needed
The toilet is self-contained, made of plastic, and has three chambers for different stages in the composting process (composting chamber, evaporation chamber, finishing chamber). A manually driven drum rotates the chambers and mixes the compost material. The toilet is made for use by two adults or families of three in permanent housing. Detailed measurements and design specifications can be found here. Aerobic breakdown is used in the composting process.
The schematics of the toilet are illustrated below. The 3-chambered drum is patented by Sun-Mar and can be moved with a handle. The compost is manually emptied by the user.
Replacement components can be ordered via the Sun-Mar webshop or found at other retailers.
Sun-Mar has a 5 year warranty on the fibre glass tank and a 3 year warranty on all other parts.
The manufacturer states odorless, easy to use, quick to install, and no pollutants or chemicals released to the environment as important performance targets of the toilet.
The tests done for NSF (National Sanitation Foundation) certification demanded that the toilet fulfilled the criteria for odors, bacterial levels and could handle the stated capacity for an extended period plus occasional overload.
Sun-Mar and National Sanitation Foundation
No safety issues related to the product, when properly handled.
12 Volt fan and a solar panel.
Sun Mar is NSF certified for liquid containment, odors, and solid end products. This standard is the National Sanitation Foundation NSF/ANSI standard nr 41, 2005.
To become NSF (National Sanitation Foundation) certified the toilet had to meet the following six requirements: “The toilet system can handle the stated capacity for an extended period plus occasional overload; The toilet system has no offensive odors; The composted output has been demonstrated to meet required bacterial content levels; Advertising, literature and labeling are not misleading; Products undergoing testing are not accessible to the manufacturer; Lab test results are confirmed by parallel testing of toilet systems operating in the field.”
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