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SunMar's Excel AC/DC composting toilet is an ideal choice for families living without grid power while their home is under construction, or in recreational cabins at the edge of grid service areas. the Excel AC/DC can be used equally well with, or without electricity, so when grid power reaches your install site, your SunMar will be ready.

Sun-Mar recommends the Excel AC/DC for families of up to 4 (or 2 adults) with year-round residential use. For vacation & weekend cabins, or seasonal use, up to 5 adults or a family of 8 can use the Excel. More from the manufacturer:

The Sun-Mar Excel AC/DC is designed for those who have no 110 volt power now, but expect to in the future. The Excel AC/DC is a high capacity composting toilet which can be operated in electric or non-electric mode . Like all Sun-Mar composting toilets the Excel AC/DC incorporates a patented Bio-drum? which ensures fast and odourless decomposition. Saves thousands of gallons of water, while recycling waste into safe useable soil. The unit is shipped fully assembled and easily installed.