Madigan Line mid - late September Solo?

Considering doing the Madigan solo just want to make sure I cover all bases with regards to self sufficiency.

I've been through the Simpson a few times with others, done Googs track several times and the northern deserts within Vic several times, so I'm not unfamiliar with sand driving.

Just have a few questions.

I have 3L diesel Patrol, well maintained driven daily, serviced regularly. Wondering what fuel consumption others have gotten doing the Madigan west - east?

We don't tow anything, can carry up to 260 litres (max) of fuel & 80 litres (min) of water, 2 fridges, iPad with Hema & Mud Maps apps, paper maps & Sat phone.
Does that sound like sufficient resources?

One auxillary battery, a solar blanket and 4 x Maxtrax. Winch, recovery gear & shovel. The most electrical stuff we run is the fridges, we have a few lights, but not many, we rely on our head torches alot.

Thanks for any advice & help.
- Matt.