To calculate the change in temperature, subtract the initial temperature from the final temperature. Example: 84.2 degree Fahrenheit - 41 degrees Fahrenheit = 43.2 degrees Fahrenheit. The temperature from morning to afternoon changed by 43.2 degrees Fahrenheit.
It needs 12 volts so it will be the standard modern power supply provides 12 volts of power.
Peninsula Clean Energy would be only the source of electricity. All power, whether generated by Peninsula Clean Energy or PG&E, is delivered over PG&E lines, and PG&E will continue to handle all billing and collections, handle all maintenance and repair of power lines, and handle any trouble calls.