The MIL-series cabin heater is designed for use in non-electric cabins where solar energy can be used to ensure a warm cabin season regardless of the season. The cabin heater is based on an efficient but economical 4 kW diesel heater and it's mounted in a stainless steel mounting box. The enclosure is mounted on the outside wall of the heated cabin, thus eliminating the noise and exhaust fumes from outside the cabin. The cabin heater can be controlled by a smartphone application remotely or, alternatively by a control panel located in the cabin.