OneEnergy helps you take control of your power bills without the expense or hassle of a full solar installation. Our modern solar-electric hot water system is wired directly into your existing cylinder, harnessing the sun to heat your water efficiently. No thermal tubes, no plumbing, no element change, no inverter, no battery, no complex setup - just reliable technology that fits into daily life and delivers results from day one. Award-winning German solar-electric technology that connects directly to any cylinder.