Developing African countries immediately sprang to mind for such a device, and I see they mention Zimbabwe in their notes.

Let's see: If we go with the "massive" supply of 5A maximum, we can get up to about 28 kW/h per day, but at no more than 1200W load at any time, I think I would find such a supply a little restrictive.

I'm seeing battery banks and inverters here, along with a "smart" charging system! [Linked Image]