Not bad setup at all. I would sleeve the cable that goes up to the solar panel in case it rubs on the metal. Would have plonked the battery in a box for the sake of a few quid.
Would have like to have seem some gauges like mine.
One shot i would have traced the door loom so it looked neater.
madness on the 750 tank. Even if it is brimmed a few days only.
Gauges?
Tracing door loom not a good idea, it needs movement when door is opening and closing, there is a lot of slack when door is closed, also it's easy for me to move it if needed, which I have done once already, it's better for everything to be easy to access, on my opinion, and it's my van, so I'm happy.
Rubbing on metal? Not on a million years, it's very light and loose, doesn't rub at all.
Madness on the 750 litre tank? No not mad just a a good size that can be filled with 750 litres if necessary, and 500 litres is fine, the van is fine with 750 in it, however I will bare it in mind and Perhaps use a small ro on site if needed.
Batteru in box, no need it's fast for me to recharge and use solar panel with an open battery, also means I can check voltage frequently and easily.
Last but not least, you sir, are the most annoying bloke on this forum!