Broadway 2016 EK Fuse location

UPDATED 
Good morning we have a possible blown fuse going from main battery to display unit as the display telling us 0 vols on main battery but the battery has been tested in meter and is good? Fridge isn’t running when 
Engine on? Works fine on LPG. Any help welcome we are going on our first adventure for a week in Scotland later and want fridge working while driving?
We also have a solar panel on roof but haven’t a clue how this charges

It’s saying number 2 fuse does anyone please know where the fuse box is for this ? We need the battery to charge the leisure  battery so we can go off grid

There is a small electrical box called an EM 40/45/50 depending on you van, it has about 8 fuses under a plastic flap and may be in a small stand alone box or fitted in a panel under a seat but all of your problems point to that unit.