> In this case, there are two distinct timescales involved Three really: seconds, hours and days. 8 kWh per day = 8 Joules per second ⋅ hours per day ~= 330

> In this case, there are two distinct timescales involved Three really: seconds, hours and days. 8 kWh per day = 8 Joules per second ⋅ hours per day ~= 330 Watts Sometimes you even get four time units in one go. e.g. "I averaged 8 kWh per day last year" It's madness.