Innovation In Sanitation Caltech’s solar-powered toilet wins the Reinvent the Toilet Challenge | The Water Network | by TallyFox August 17, 2012 WasteWater Education Leave a comment Caltech’s solar-powered toilet wins the Reinvent the Toilet Challenge | The Water Network | by TallyFox. Share this:TwitterFacebookLinkedInPinterestTumblrEmailLike this:Like Loading...