Hot water heater for Mercedes-Benz Marco Polo W447, fresh water tank heater for your camper - incl. installation
Item no. 36099
- Warm water on board: Heated fresh water for dishwashing and showering.
- No starter battery drain: Heater runs on the leisure battery.
- Simple on/off control: Illuminated switch in your kitchenette.
- Reversible setup: Cable passes through the lid, leaving the tank undamaged.
Warm water for washing up and showering beneath the tailgate: this water heater warms the water directly inside the tank of your Mercedes-Benz Marco Polo W447 with a 37-litre fresh water tank. Installation at the 1sternehotel workshop is included.
Warm water straight from your fresh water tank
The self-regulating heater is installed inside the fresh water tank. Under the stated reference conditions, the specified water temperature is approximately 37 to 40 °C. You switch the heater on and off manually using an illuminated switch in the kitchen unit.
Allow time for the tank to heat up
With the 37-litre tank completely full, the warm-up time is approximately 5 hours. Allow for this heating period when planning to wash up or take a shower.
The stated temperature, warm-up and consumption figures are based on an ambient temperature of around 15 °C and an initial water temperature of around 15 °C. Colder or warmer conditions will change the warm-up time.
Plan your power supply around the heater's consumption
The heater draws approximately 8 A, equivalent to around 40 Ah over 5 hours. It has a fused connection to the leisure or auxiliary battery, so the starter battery is not used to power the heater.
The original AGM leisure battery is not particularly well suited to this demand. For operation, we recommend a suitably configured power supply with a solar system and/or a lithium leisure battery, together with a 50 A DC-DC charger. Take this power demand into account when planning the installation.
In winter, the focus shifts to frost protection
At outside temperatures around 0 °C, the heater provides frost protection for the water in the fresh water tank. Under these conditions, it does not heat the water to 40 °C. This frost-protection specification applies to the tank, not to the entire water system.
A second heating element can be installed as an additional option. It should be operated only when connected to shore power or while driving.
A cable entry through the cap allows the installation to be reversed
The heater cable passes through a sealed gland in the fresh water tank cap. The tank body itself is not damaged by this cable routing. The installation can be reversed, for example on a leased vehicle. A matching replacement fresh water tank cap is linked for replacing the modified cap.
Product details
Warm-up time for 37 L of fresh water: approx. 5 hours.
The installation can be reversed.
Easy manual on/off control using an illuminated switch.
Which vehicle is this fresh water tank heater designed for?
The version described is intended for the Mercedes-Benz Marco Polo W447 with a 37-litre fresh water tank.
What does the product include?
It includes the fresh water tank heater and installation at the 1sternehotel workshop. This includes the illuminated switch in the kitchen unit, the sealed cable entry through the tank cap and the fused connection to the leisure battery.
How is the heater operated?
You switch the self-regulating heater on and off manually using an illuminated switch in the kitchen unit.
How warm does the water get, and how long does heating take?
The stated reference figures are approximately 37 to 40 °C water temperature and around 5 hours of warm-up time with the 37-litre tank completely full. These figures are based on ambient and initial water temperatures of around 15 °C. Different conditions will change the warm-up time.
How much current does the heater draw, and which battery powers it?
The current draw is approximately 8 A, equivalent to around 40 Ah over 5 hours under the stated reference conditions. The heater has a fused connection to the leisure or auxiliary battery, not the starter battery.
What power supply is recommended?
The original AGM leisure battery is not particularly well suited to the stated current demand. A solar system and/or a lithium leisure battery, together with a 50 A DC-DC charger, are recommended to provide suitable energy reserves.
What does the tank heater do in winter?
At outside temperatures around 0 °C, the heater provides frost protection for the water in the fresh water tank. It does not heat the water to 40 °C under these conditions. The frost-protection specification applies to the tank, not to the entire water system.
When should an additional heating element be used?
A second heating element can be installed as an additional option. It should only be used when the vehicle is connected to shore power or while driving.
How is the cable routed, and can the installation be reversed?
The cable passes through a sealed gland in the tank cap without damaging the tank body. The installation can be reversed, and the modified tank cap can be exchanged for a replacement cap.
| Brand | 1sternehotel |
| Item No. | 36099 |
| Content | 1 Installation |
| Condition | New |
| Weight | 441 g |
| Customs tariff number | 85168080 |
| Manufacturer | Axel Seidel Peter-Seifert Str. 10 36129 Gersfeld Germany hello@1sternehotel.de |
