What’s the Same
Both the Dieselheat DH Hydronic and E-Solar systems are built around the high-quality, German-made Eberspächer D5E diesel furnace. This furnace provides 5kW of heat output and is one of the quietest and most advanced diesel hydronic furnaces currently available.
Both systems can also support optional air heating and work very effectively as combined hot water and air heating systems.
Key Differences in System Design
The main difference between the two systems lies in their overall design philosophy.
DH Hydronic
The DH Hydronic system is a hybrid on-demand system that behaves partly like an instant hot water system and partly like a storage system. It stores 9–30 litres of engine coolant in a stainless-steel tank. This coolant is heated by the diesel furnace and acts as a thermal “battery,” instantly heating fresh water as it passes through a built-in plate heat exchanger.
E-Solar
The E-Solar system is more like a traditional storage hot water system. It uses an insulated copper tank to store hot water, which can be heated using diesel, electricity, or (in marine installations) the vessel’s engine.
Operating Difference
A key operational difference is how hot water is accessed:
- The DH Hydronic system must be switched on to produce hot water.
- The E-Solar system stores hot water, so once heated, hot water remains available even after the system is switched off.
Feature Summary
DH Hydronic
- Hybrid between instant and storage system
- Diesel only
- Must be switched on to produce hot water
E-Solar
- Storage hot water system
- Diesel, 240V, 12V, or marine engine heating options
- Hot water remains available after switching off
Which System Should You Choose?
- Choose DH Hydronic if you have a caravan or RV, spend a lot of time off-grid, move frequently during the day, and want a compact, fast-heating system powered solely by diesel.
- Choose E-Solar if you live in your caravan full-time, spend extended periods in caravan parks with access to mains power, want solar hot water or live aboard a boat and want hot water available at all times without needing to switch the system on.
For more information and details about these systems please view the DH Hydronic information page or the E-Solar Information page on our website.
