I wrote:
The other part of the equation I omitted to ask about is how much one of these Aldi machines takes out of a battery to make a cup of coffee? I have no idea how long they take , only that they are rated at 1455 watts. I don't know how many cups the owner wants to make at a sitting, & suspect that he'll probably only have a single 105 amp hour ( or similar) auxiliary battery.

I'm guessing that the high current draw over a short period may be ok for one or two cups, but much more than this will stuff his battery, so making coffees for everyone in camp won't be such a good idea?




To which I have received the following response:
Cuppa,I don't think a single battery would be big enough to run the coffee machine with out the risk of the inverter cutting out.The warm up time on my machine is 4-5 minutes,plus the time to heat the milk and process the coffee.I think he would need at least two batteries to complete the process (I am comparing to my own experiences with my batteries).When camping on cloudy days I get out the geny when making coffees to preserve the batteries.


He has confirmed what I thought. I suppose it may work if you were running the motor whilst using the coffee machine? Or a gennie. Bottom line is that when taking large amounts of current out of a battery in a short timeframe it hits them much harder than taking the same amount over a longer timeframe. Something to Peukerts Law I think, but don’t ask me to entry to explain Peukerts, I'm only 'name dropping'!


At the very least if it were me, & I felt I had sufficient battery capacity I,d try to borrow an inverter to test it out before buying.
Cuppa