4 ms·

1 KWh/day for Fridge. Lights should do less than 0.5KWh/day. Washing machine is maybe 0.3KWh/day. Maybe, other electronics might add up to 1-2KWh/day. Cooling i

1 KWh/day for Fridge. Lights should do less than 0.5KWh/day. Washing machine is maybe 0.3KWh/day. Maybe, other electronics might add up to 1-2KWh/day. Cooling is not required most of the year. Maybe fans for a couple of months. Heating is separate (EDIT: UK figure), as others have noted. What else are you using electricity on?

ncallaway 6y ago
> Heating is separate, as others have noted. Heating isn't separate for me. For me, cooling isn't required most of the year (probably similar to UK weather), but for many parts of the US cooling is required almost year-round.
kragen 6y ago
Heating, which can easily be 5 kW, 120 kWh/day; many US houses are heated electrically, so it's not always separate. Air conditioning can easily be 3 kW, or 72 kWh/day, although it's usually only on during the daytime, so figure 30 kWh/day; it's common to run a 240 VAC circuit in the US for the air conditioner because the 2.4 kW of a standard 120 VAC 20 A circuit is insufficient. Incandescent lights could easily be 1 kW (which you get to offset against the heating part of the year), which is another 24 kWh/day. A household stove is usually about 4 kW if you're cooking on two burners, but you're probably only cooking about 2 hours a day, so that's 8 kWh/day if you cook at home. (Some people cook with other fuels, but others use electric stoves.) Hot water heaters are also a few hundred watts, I think; an on-demand tankless hot-water heater is on the order of 3 kW, but in the US hot-water tanks are far more common, constantly leaking heat through their fiberglass insulation. In Arizona and New Mexico, where I grew up, common inefficient houses need air conditioning during the day and heating at night much of the year. So it's easy to see how, even if cooling is not required most of the year, you could easily use 50 kWh/day of electrical energy in the kinds of huge houses people have in the US.
- galangalalgol 6y ago
  I think AC is usually 440v around here. It is the largest consumer.

ncallaway 6y ago

> Heating is separate, as others have noted. Heating isn't separate for me. For me, cooling isn't required most of the year (probably similar to UK weather), but for many parts of the US cooling is required almost year-round.

kragen 6y ago

Heating, which can easily be 5 kW, 120 kWh/day; many US houses are heated electrically, so it's not always separate. Air conditioning can easily be 3 kW, or 72 kWh/day, although it's usually only on during the daytime, so figure 30 kWh/day; it's common to run a 240 VAC circuit in the US for the air conditioner because the 2.4 kW of a standard 120 VAC 20 A circuit is insufficient. Incandescent lights could easily be 1 kW (which you get to offset against the heating part of the year), which is another 24 kWh/day. A household stove is usually about 4 kW if you're cooking on two burners, but you're probably only cooking about 2 hours a day, so that's 8 kWh/day if you cook at home. (Some people cook with other fuels, but others use electric stoves.) Hot water heaters are also a few hundred watts, I think; an on-demand tankless hot-water heater is on the order of 3 kW, but in the US hot-water tanks are far more common, constantly leaking heat through their fiberglass insulation. In Arizona and New Mexico, where I grew up, common inefficient houses need air conditioning during the day and heating at night much of the year. So it's easy to see how, even if cooling is not required most of the year, you could easily use 50 kWh/day of electrical energy in the kinds of huge houses people have in the US.

galangalalgol 6y ago
I think AC is usually 440v around here. It is the largest consumer.