Here is my DYI portable power roll-around station with storage
This rolling tool case now houses 2x 12v 20ah batteries with a 400watt 2x plug pure sine wave inverter.
The 2 batteries are in the lower section with enough room left for extension cords and battery charger. The lid slides down for easy access.
The top box/try holds the Camera body, lenses, Grip and other small accessories.

Back:


Batteries:


front open:


front closed: