On Thursday, 11 June 2015 22:11:59 UTC+1, Cursitor Doom wrote:
I was just wondering what sort of electric bill he can
expect (after they've gone home, obviously). They made several overnight
charge-ups during testing and he said his breakers were repeatedly
tripping out. Anyone care to do the maths?

Depends on which breaker was tripping.

Assuming lots of things like a steady sustained load and a breaker tripping exactly on rated current,

32 Amp socket ring circuit = 7.680 kW load at 240 volt.

7.680 kW for 8 hours overnight charge = 61 kWh

61 kWh @ say 12p / kWh (depends on electricity tariff) = £7.30

Unless I've misplaced a decimal point somewhere.

Owain