While I'm not about to trade in my high-efficiency washer and dryer for a manual off-grid machine, this simple design is perfect for building a cheap and effective washer for campgrounds, cabins and other remote locations.
Michael Perdriel originally designed his low-cost and efficient manual laundry machine to help out people in developing nations. While you may not be in a daily situation where you need to build your own machine and run it without electricity the design is extremely clever for situations like camping, a cabin without electricity, or for forays into reducing your environmental impact.
The washer is comprised of three main components: the bucket, the clothing bag, and the lever. The most impressive part of the design is the bag itself. While it may look like, from the illustration above, that you're just dunking a bag of clothing into a bucket of soap water, the bag is actually designed to agitate the clothing and keep the individual garments from clumping together. Check out the full article at the link below for a run down on how the entire thing is constructed including how the bag acts as an agitator and wringer all in one.
Off-Grid Laundry Machine [Make]