Is 8kW too much for a small camper van?

Usually yes. 8kW is sized for large RVs, buses and truck cabs. In a small van it will cycle on and off, use more fuel and feel too hot, so a 2kW or 5kW unit is a better match.

Will it run on both 12V and 24V systems?

Yes, the heater is rated for DC 12V and 24V, which covers most camper and truck electrical systems. Check the wiring and fuse rating for your voltage before install.

What comes in the box?

The heater unit, the remote control and the color digital display are the listed contents. Mounting hardware, fuel line, exhaust and ducting are not confirmed, so check the kit before buying.

How much diesel does an 8kW heater use?

Expect roughly 0.5 to 1 liter per hour at full output, less when it modulates down. Real use depends on outside temperature and how well the space is insulated.

Can I install it myself?

It is doable for a confident DIYer, but the exhaust must vent outside and the fuel line and combustion air intake need a safe route. A poor install risks fumes and fire, so use an installer if unsure.

Does the remote control work from inside the RV?

The remote is for convenient operation, but range and whether it is infrared or radio are not specified. Treat it as a short-range convenience rather than remote start from far away.