The simplest kind of off grid toilet is a self-contained composting toilet. These off grid toilets combine all the necessities – a place to sit, a composting chamber, and an evaporation tray – in a single enclosure. Self-contained composting toilet systems are installed directly in the bathroom (no plumbing required) and electric models can plug into a standard wall outlet. Another advantage of a self-contained composting toilet is that during winter in cold climates (when the composting microbes needs to be kept warm), heating the bathroom keeps both the toilet user and the compost chamber warm.
In central composting toilet systems, the composting chamber must also be kept warm, but is often installed in a basement away from the bathroom. If you are unsure about your composting toilet needs, don't hesitate to call the Real Goods Tech Desk at 800-919-2400.