Mike
Have a look at these, I run my 8" goto dob off the 1000 unit. Used it over three nights thus far, one for 3hrs and the others for around 1.5hrs and still had a little charge.
They claim it will run a car fridge overnight and start your car if the battery is flat. Have't tested that yet.
There are cheaper versions through the 4x4 super centre.
Very compact and seems to work fine on mine at least, You are running more gear then me and you know what output you need but worth a look.
The fit in the glove box.
https://itechworld.com.au/products/i...kup-power-bank
https://itechworld.com.au/products/i...ess-power-bank
Steve