---
product_id: 485933827
title: "Dernord 12V 300W Immersion Heater Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch NPT Fitting Double U Type"
brand: "dernord"
price: "€ 47.14"
currency: EUR
in_stock: true
reviews_count: 5
url: https://www.desertcart.sk/products/485933827-dernord-12v-300w-immersion-heater-submersible-water-heater-element-stainless
store_origin: SK
region: Slovakia
---

# 12V DC power compatibility 300W efficient heating output 1" NPT standard fitting Dernord 12V 300W Immersion Heater Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch NPT Fitting Double U Type

**Brand:** dernord
**Price:** € 47.14
**Availability:** ✅ In Stock

## Summary

> 🔥 Power your water heating with smart, sustainable energy! ⚡

## Quick Answers

- **What is this?** Dernord 12V 300W Immersion Heater Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch NPT Fitting Double U Type by dernord
- **How much does it cost?** € 47.14 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/485933827-dernord-12v-300w-immersion-heater-submersible-water-heater-element-stainless)

## Best For

- dernord enthusiasts

## Why This Product

- Trusted dernord brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Versatile 12V DC Power:** Seamlessly integrates with batteries, solar panels, and wind turbines for off-grid heating solutions.
- • **Universal 1" NPT Flange:** Fits standard US water tanks or custom setups with ease, making installation hassle-free.
- • **Weatherproof Silicon Seal:** Flexible, waterproof sealing washer guarantees leak-free performance in any environment.
- • **Robust 300W Heating Element:** Delivers reliable and consistent warmth, perfect for water tanks, caravans, and workshops.
- • **Premium Stainless Steel Build:** Electropolished surface ensures corrosion resistance and long-lasting durability.

## Overview

The Dernord 12V 300W Immersion Heater is a stainless steel, corrosion-resistant heating element designed for versatile off-grid applications. Featuring a universal 1" NPT fitting, it easily integrates with batteries, solar panels, and wind turbines to provide efficient, reliable water heating for caravans, boats, workshops, and more. UL and cUL safety certified, it includes a flexible silicon sealing washer for waterproof installation, making it the go-to solution for eco-conscious professionals seeking dependable warmth anywhere.

## Description

Product Features 12V 300W Element : These elements are made from stainless steel to prevent any corrosion so are suitable for use in virtually all types of water tank Product Application → Great for use heating water in domestic hot water cylinders or water tanks in caravans,boats,workshops etc. Can also be used with waste vegetable oil in the the manufacture of biodiesel, and for home brewing etc → Can also be used with waste vegetable oil in the the manufacture of biodiesel, and for home brewing etc → These can also be used to prevent water freezing during winter months in livestock drinkers or raised ponds by connecting one to a large 12v battery recharged by a large solar panel or wind turbine, just use a basic 5 degrees c normally open thermostat and when the water temperature gets near five degrees the heater will automatically come on and warm the water by a few degrees before switching off again, one could also be used in the water storage tank in your loft if its prone to freezing in the winter months NOTES If you have a gas hot water heater you may wish to put an electric unit ahead of it. This way the gas heater is always being fed hot water so it does not turn on as often and for shorter periods of time when it does. If used as a diversion (dump) load, such an element is connected to the batteries via a charge regulator. When the regulator detects that the batteries are fully charged, it diverts the generated electricity to the element which heats water. Technical Details Voltage:12 volts Wattage:300 watts Item Weight:7.9 ounces Product Diameter: 8mm Tube length: 7.1 Inch Screw Type:1"NPT Color:White

Review: Works fine, really wish it was hotter
Review: Works.. Just abit more then 500 watts

## Features

- 12v DC heater connects with batteries, solar panels, hydroelectric generators and wind turbine dump
- 1" NPT flange fits USA standard water tank or your own custom heater tank
- UL and cUL listed to the safety standards
- Stainless steel surface has electropolish
- Supplied with silicon sealing washer which is flexible and waterproof

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B017VT68XA |
| Best Sellers Rank | 746,085 in DIY & Tools ( See Top 100 in DIY & Tools ) 2,314 in Water Heaters & Parts 33,958 in Large Appliances Parts & Accessories |
| Brand | DERNORD |
| Colour | Silver |
| Customer Reviews | 4.1 out of 5 stars 124 Reviews |
| Item Length | 175 Millimetres |
| Item Weight | 11 Ounces |
| Item length | 175 Millimetres |
| Manufacturer | Dernord |
| Material | Stainless Steel |
| Material Type | Stainless Steel |
| UPC | 717080640254 |
| Unit Count | 1.0 Count |
| Voltage | 12 Volts |
| Wattage | 300 watts |

## Product Details

- **Brand:** DERNORD
- **Colour:** Silver
- **Item length:** 175 Millimetres
- **Material:** Stainless Steel
- **Voltage:** 12 Volts

## Images

![Dernord 12V 300W Immersion Heater Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch NPT Fitting Double U Type - Image 1](https://m.media-amazon.com/images/I/51FYnsu4YhL.jpg)
![Dernord 12V 300W Immersion Heater Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch NPT Fitting Double U Type - Image 2](https://m.media-amazon.com/images/I/51aEnfHyyIL.jpg)
![Dernord 12V 300W Immersion Heater Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch NPT Fitting Double U Type - Image 3](https://m.media-amazon.com/images/I/51e+LFS2OhL.jpg)
![Dernord 12V 300W Immersion Heater Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch NPT Fitting Double U Type - Image 4](https://m.media-amazon.com/images/I/51hj+VEp5mL.jpg)
![Dernord 12V 300W Immersion Heater Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch NPT Fitting Double U Type - Image 5](https://m.media-amazon.com/images/I/51hsodamlUL.jpg)

## Questions & Answers

**Q: Will this heater work for a 450 gal tank to keep water from freezing?**
A: Most likely NOT, Is the tank indoors or outdoors? you will need at least a 800watt element, make sure yo have a thermostat to control the temp...

**Q: I will be connecting this directly to my solar panel. My solar panel puts out 12-21 volts. Will 21v damage the element?**
A: The heater is actually two twelve volt elements connected in parallel by factory jumpers. Much of the time, this load would pull down a 300 watt panel to very low voltage resulting in poor heating. You will probably find the higher voltage and lower amps of putting the elements in series (change the factory jumpers) across your panel yields better results (heating) and solves the possibility of damaging the elements. The heater then becomes 24 V and 300 W.

**Q: What is the resistance of the element aka how many ohms is it**
A: The element which is made of sus304 has 0.48 ohms. Thank you

**Q: what size bulkhead do folks use for this? Any links to one?**
A: 12 volt 300 watt will take a long time to heat up i use a 48 volt 1000 watt element with batterys

## Customer Reviews

### ⭐⭐⭐⭐ Works fine, really wish it was hotter
*by T***. on 4 February 2023*



### ⭐⭐⭐⭐ Works.. Just abit more then 500 watts
*by T***M on 13 September 2025*



### ⭐⭐⭐⭐⭐ ~300 watts verified
*by M***T on 29 September 2024*



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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-01-25*