It's not answering the inverter question, but there are other stove top options that make good coffee.
http://www.atomiccoffeemachines.com.au
There are cheaper versions of the same thing but you will need a grinder to get the best out of it.
Buying the atomic, an electric grinder and a small inverter would be cheaper than the inverter required to run the pod machine. Plus you're not limited to pods! You can get whatever coffee you like!
Hope that helps.
Dan

