Originally Posted by StuM
Yep, that 6 amp hours in 4 minutes suggests that it is a 1 KW heating
My knowledge of those ingenious electrons is sketchy at best, clueless at worst.
But surely if the element used 90ah as mentioned above, then that would have drained my little 100ah battery
. It didn't.
Here's my dodgy electron mathematics:
Stamped on the element's casing is "300W".
At 240 volts, isn't that 1.25 amps?
Thus, at 12 volts, on the input side of the inverter
, aren't we talking 25 amps (300 /12)? (plus inverter
losses, let's say 30 amps).
So if run the element for an hour i'd consume 30 amp hours.
Run for only 4 minutes, isn't that 2 amp hours (there are 15 blocks of 4 minutes in an hour, so 30 amps divided by 15 equals 2)?
Where did i go wrong? (probably forgot to carry the 1).