We just received our power bill and it is showing a 30% rise in kWh for the past month. Nothing has changed in our home. We were even gone one full week in the month.
To make it more interesting, this past summer our stove would not ignite because the line voltage was 108 V because it requires a 2.4 amps through the igniter before the gas valve will open (at 120 V). I contacted the electrical supplier and they came out, confirmed the condition and changed the tap because AC units were pulling the line down. All was well. They then came back out weeks later, but I don't know what they did. (Changed it back, perhaps?) Yesterday we tried to use the oven and wala-no ignition. I was in a hurry to go somewhere and could not check the voltage, but when I did last night it was 114 V. Are the higher kWh usage and low line voltage related issues? I don't know. With refrigerators and pumps on the line as inductive loads, will their changes in efficiency at lower voltage cause higher kWh? It would seem so since losses would go up. That's the main question.