These low-voltage water-heating elements are for use as diversion loads for wind or hydroelectric systems. Use one or more of these heating elements with a charge control designed for load diversion, such as the Xantrex C40 or C60, to turn your excess power into hot water. They fit most standard electric water heaters with screw-in elements. We have one model for 12- and 24 volt systems and another for higher power 24- volt systems and 48 volt systems. The 12/24-volt element can be wired to consume 25 or 50 amps at 14.5 volts or 25 amps at 29 volts. The 24/48 volt element can be wired to consume 30 or 60 amps at 29 volts or 30 amps at 58 volts. Order one or more elements with a total current draw greater than your charging system's maximum output, but no more than the maximum power rating of the charge control in the diversion mode. If your water heater tank is designed for square flange elements, use one square flange adapter for each element.