567
Costly rule
(lemm.ee)
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
this post was submitted on 23 Feb 2024
567 points (100.0% liked)
196
16245 readers
2866 users here now
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
founded 1 year ago
MODERATORS
KWh is a measure of total energy, not instantaneous power. Your watt meter was saying that since last reset of the value it measured 40 KWh of energy use. That's not an insignificant amount - a Chevy Bolt can go around 180 miles on 40KWh. Watts, or kilowatts, are instantaneous power. That same Bolt can easily pull 100KW while accelerating and if it could somehow do that for an hour, it would have used 100KWh. It could never make it the whole hour as it has a 65KWh battery, so it would run out after 39 minutes.
What you're describing is kWh, not kW/h. You need to multiply power with time to get back to energy. An appliance using 1kW of power for 1h "uses" 1kWh of energy. The same appliance running for 2h requires 2kWh instead.
kW/h doesn't really make sense as a unit, although it could technically describe the rate at which energy consumption changes over time.
Autocorrect seems to disagree, but autocorrect doesn't know shit about power vs energy. Fixed it.