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For a house, you probably have access to 50 amps. Most circuit breakers are 20 amps. It's better to think in terms of watts. The relationship between volts, amps, and watts is defined by Watt’s Law: P (W) = V (V) × I (A) 50 X 220= 11,000 watts. That is what you have access to, not what you use. Even if you have devices that convert to DC, you're still using watts. Your electric company charges for watts. For a 20-amp circuit (your plugs are 120 V), multiply the volts by 20. Your watt rating at that plug within a circuit is 2400 watts. My space heater uses 1800 watts on high. At $0.1190 per kWatt hour, it costs $.21 per hour to run. (I'm in Texas) BTW, never load a circuit at more than 80% of the rated watts. Look at your bill. You are charged for the number of watts you use. The only way to save is by reducing the number of watts you use.

Thank you for the excellent descriptions.

My house has two 200 amp breaker panels from a 400 amp service. I’m slowly decreasing my bill from outrageous to painful.

Air conditioning is the bulk of it, even with two new energy efficient units.

I have many horse & buggy Amish clients who have no electric in their houses or barns. It’s no wonder that most of them are swimming in cash.

"Look at your bill. You are charged for the number of watts you use. The only way to save is by reducing the number of watts you use."

There you go, spot on.!

If you got fine desktop computer, fast with lots of power, big video card, I'm old so I got a big screen monitor that I can see. So, with just this I'm probably pulling around 600 watts. (?)