In one embodiment, an improved circuit breaker module is installed in an electrical panel of a customer structure that receives power from a solar cell module and a utility company. The circuit breaker module may include a current sensor for sensing electrical current drawn by the customer structure from the utility company. The circuit breaker module may further include a current processing unit for capturing sensed electrical current values to generate energy consumption data and a data transmitter for transmitting energy consumption data to a remotely located data collection computer. The circuit breaker module may transmit energy consumption data over a wired or wireless data link. The circuit breaker module advantageously allows for relatively low cost and easy installation, encouraging installation of solar cell modules even in existing customer structures.