Patent ID: 8909033
Filing Date: 2014-12-09
Classification: F24D,F24H,H05B,Y02B

Abstract:
1. A method for use with a hot water heater having a first electrical heating element connected to two electrical power sources: providing a first electrical connection between an electrical heating element of storage type hot water heater and a first AC electrical power source, wherein the first AC electrical power source is a utility supplied source; providing a second electrical connection between the electrical heating element and a second AC electrical power source, wherein the second AC power source is a renewable energy source that generates AC electrical energy from inverted DC electrical energy, wherein the first AC electrical power source and the second AC electrical power source are electrically isolated; operating a controller associated with the first and second electrical connections to electrically connect one of the first and second AC electrical power sources to the electrical heating element and electrically disconnect to other of the first and second AC electrical power sources from the electrical heating element, wherein the second AC power source is electrically connected when an electric power level of the second AC power source is above a predetermined threshold and electrically disconnected when the electric power level is below said predetermined threshold.