Before considering a diesel heating system you need to make sure that you have a space big enough in the rv to install the unit.
Diesel block heater solar panel.
I would think just use the solar panel to charge top off the batteries would be more then enough for 85 of the situations you run into.
Over the course of a sunny day this system can heat a room at zero cost.
Video shows how to set up a small off grid 12v desktop air heater.
My block heater is stock as far as i know.
Order engine heater block universal for your vehicle and pick it up in store make your purchase find a store near you and get directions.
All you need is 2 things to make it.
It draws 378 watts according to my special plug in watt meter and heats the engine enough to melt a doughnut ring of snow around the valve cover area.
Your order may be eligible for ship to home and shipping is free on all online orders of 35 00.
The size shown can heat a small office in the dead of winter as long as the sun is shining or you can build smaller units to distribute around your house.
The biggest problem with a diesel in winter is just pure cranking power also with adding a trickle charge from the solar panel you will also slightly warm the batteries so they will perform better 2 fold.
For caravans a diesel tank must be installed but for the majority of motorhomes the heater can source its diesel fuel from the existing diesel fuel tank.
There are no pumps fans or moving parts.
De longhi mica thermic panel heater full room quiet 1500w freestanding easy install wall mount adjustable thermostat 2 heat settings black hmp1500 4 1 out of 5 stars 2 794 92 32 92.
Unit is powered using only one solar panel.