@goofyfoot
Some random feedback.
I downloaded some new software for the battery - it is on my network and I can monitor it from my iPad. With the new software, the fan does not go on while driving my amp.
(Note, my amp only draws 35 Watts which is little more than what a DAC or CD player would draw.)
For kicks-and-giggles I ran the toaster off the battery. The toaster drew close on 700 Watts(!) of power and the fan turned on from the get go and the unit did heat up.
I did get the extended battery for my unit. I now seldom have my battery go below 85% during an evening of listening. Keep in mind my amp is very frugal power wise. You can expect the same or better performance on your front end components.
Lastly, the unit unit can be switched between 50Hz and 60Hz output. I am not sure if I am imagining things, but I'm sure my amp sounds better on 50Hz. I suspect the rectifier has an easier time with the slower cycle, and/or it has an easier time dealing with ripples at 50Hz than 60Hz.