A second-generation hybrid solar water heating system, the ecoMax° integrates waste heat recovery, along with solar thermal, to produce free hot water for domestic and light commercial use. The specially designed controller means HVAC technicians can now tap into a second free heat source: waste heat recovery from a/c and refrigeration units. It can be retrofitted to an existing solar thermal system so that even if the sun is not shining, the system can still produce hot water from the hybrid system’s second renewable energy source. The newly designed 24-vac low-voltage controller features a user-friendly touch screen, self-explanatory menu for quick programming and commissioning, real-time heat quantity measuring, and data acquisition via an SD card optional. According to the company, along with its integrated components, solar panels, heat recovery units, pump station, pre-wired insulated line sets, and storage tanks, the water heating system is truly a plug-and-play system.