It would also be nice to get a better idea of where this installation would be located. Is it a desert, arctic, ocean, mountain or some other type of location? Those factors would help to narrow down the choices. If you will be dependent on solar for main or backup power, then locations such as the arctic and antarctic could be problematic due to low sun angles. You did mention a 220 power source that is not as reliable as US power thus, one of the reasons for needing to know the location.
The more info you give the better our answers will be...