This is a pic of the dashboard when i had 1256,7km done.
I had around 100km left of range.
I did a little tweaking to the batterie bank i had in the trunk.
I taped all the poles of the batteries, except for 1+ and 1-.
Maked an mounting harnes (witch is held in place left and right by the with of the wood, and up+down & front+back by the yellow strap that holds the bank in place.
I added a relay between the black negative wire from the bank to the 1000W inverter (from 12V DC to 230V AC).
Then i put the switch from the inverter on "on".
I plugged in this 1500W heater.
Set it at position "1" (=750W)
Position "2" = 1500W
Position "0" = OFF
The red switch at the shifter controlles the (200A) relay.
And by that it controlles an 750W cabin heater
Witch is trapped and held in place between the net and the back seats.
No more cold in the car.
Now I only need to install an remote controlled relay in parallel with that red switch and i can remotely start the heater to preheat the car.
The only down side to this, is that in winter, when i use the heater until the engine is at operating temperature, i need to charge every 2 days, instead of every 4 days (yes, i only work 4 days in a row
).