I own one in Europe. We used it in a motorhome there for 2 years. It is an EFOY 2200 and has a charging output of 90W (7.5A at 12V). I think that model is about $13,000 new here.
Fantastic bit of kit.
We used it several times when the sun did not shine and also kept things running when the batteries died and before we could get them replaced.
It was installed under a seat inside the motorhome and made about the same noise as a compressor fridge, so no problem to run at night. It is also a fraction of the weight of a generator.
They are fully automatic. They start when the battery is down to 12.3V and would turn off when it was fully charged.
10L of fuel lasted for a long time. They produce 1kWh (about 80Ah at 12V) from 900ml.
As a primary source of power they are fantastic, actually, but the fuel is quite expensive here. It could be connected to a quite small battery and simply keep it topped up as power is used. More commonly used as a supplement to solar.
It is for sale, but it is still in Europe.

Cheers,
Peter

On the kimberly campers site it shows $151 for 10L of Fuel

It produces 130 Amp Hours in a day, and consumes 0.07L per hour, so to produce the 130 Amp Hours takes about 1.7L

So if you have 2x 100Amp batteries and need to recharge them from around 20-30% using the fuel cell, you can expect to take a day and a half and use about 2L of fuel to do it if the cells are your backup.

If the cells are your primary source of power you will use about 1.3L per 100 Amps

Hope my maths is all correct :P