---
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: "22196 Ft"
currency: HUF
in_stock: true
reviews_count: 5
url: https://www.desertcart.hu/products/485933827-dernord-12v-300w-immersion-heater-submersible-water-heater-element-stainless
store_origin: HU
region: Hungary
---

# 12V DC compatible - battery & solar ready 1" NPT flange - fits standard US tanks Electropolished stainless steel - corrosion resistant Dernord 12V 300W Immersion Heater Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch NPT Fitting Double U Type

**Brand:** dernord
**Price:** 22196 Ft
**Availability:** ✅ In Stock

## Summary

> 🔥 Heat smarter, live greener with Dernord’s 12V powerhouse!

## 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?** 22196 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/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

- • **Smart winter warrior:** Prevents freezing in livestock drinkers and outdoor tanks with simple thermostat control.
- • **Eco-conscious versatility:** Ideal for biodiesel production, home brewing, and sustainable living setups.
- • **Universal fit, zero hassle:** 1-inch NPT flange ensures easy installation on standard or custom water tanks.
- • **Built to last, built for safety:** UL and cUL listed with electropolished stainless steel for superior corrosion resistance and durability.
- • **Power your water heating anywhere:** Seamlessly connects to batteries, solar panels, and wind turbines for off-grid energy independence.

## Overview

The Dernord 12V 300W Immersion Heater is a durable, stainless steel submersible heating element designed for off-grid and eco-friendly water heating solutions. Featuring a standard 1-inch NPT fitting, it easily integrates with US water tanks and custom setups. UL and cUL safety certifications ensure reliable performance, while its compatibility with batteries, solar panels, and wind turbines makes it perfect for caravans, boats, workshops, and sustainable living applications.

## 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: I replaced the 120v element in a Kuuma heater with this unit. Ran 8 gauge power cable to it and it does work. But it takes forever to heat a 10 gallon water heater from cold. Like 6 hours. The 120v element heated the tank from cold in 45 minutes. Once hot it maintains temp okay. Each cycle is about 1 hour. That being said its drawing 28 amps during that time. Overnight that depletes 40% of my 600ah battery bank. Not what I was hoping for. At 28 amps I really wish this got way hotter. I cannot decide if this is performing better than when I ran the 120v element off my inverter. I believe overnight depletion is around the same. I am really interested in trying it at 24 volts, but that an experiment for future me. So if your using this in a vehicle, and that vehicle is running the engine every day you should be fine. And 28amps is way less stress on the batteries than 160amps is from an inverter. Just plan you showers accordingly as the recoup time is LONG. I will update long term performance a few months from now.
Review: Works but it isn't 500 watts. Meter rates it at around 640 watts. It works just fine but I wasn't expecting the extra 140 watts on my solar system.. Would buy again

## 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 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 741,926 in DIY & Tools ( See Top 100 in DIY & Tools ) 2,309 in Water Heaters & Parts 33,704 in Large Appliances Parts & Accessories |
| Colour | Silver |
| Customer Reviews | 4.1 4.1 out of 5 stars (122) |
| Date First Available | 11 Nov. 2015 |
| Item Package Quantity | 1 |
| Item Weight | 311 g |
| Item model number | DERNORDJF-15010302 |
| Manufacturer | Dernord |
| Material | Stainless Steel |
| Package Dimensions | 24 x 5.31 x 4.39 cm; 311.84 g |
| Part number | DERNORDJF-15010302 |
| Size | 12V 300W(Double U Type) |
| 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/31H0Lk3Sm9L.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/31RbpIT3CJL.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/419Ha0uyoVL.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/41Besb8SO2L.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/41ZZEGzX3JL.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

### ⭐⭐⭐⭐ Review
*by T***. on 4 February 2023*

I replaced the 120v element in a Kuuma heater with this unit. Ran 8 gauge power cable to it and it does work. But it takes forever to heat a 10 gallon water heater from cold. Like 6 hours. The 120v element heated the tank from cold in 45 minutes. Once hot it maintains temp okay. Each cycle is about 1 hour. That being said its drawing 28 amps during that time. Overnight that depletes 40% of my 600ah battery bank. Not what I was hoping for. At 28 amps I really wish this got way hotter. I cannot decide if this is performing better than when I ran the 120v element off my inverter. I believe overnight depletion is around the same. I am really interested in trying it at 24 volts, but that an experiment for future me. So if your using this in a vehicle, and that vehicle is running the engine every day you should be fine. And 28amps is way less stress on the batteries than 160amps is from an inverter. Just plan you showers accordingly as the recoup time is LONG. I will update long term performance a few months from now.

### ⭐⭐⭐⭐ Review
*by T***M on 13 September 2025*

Works but it isn't 500 watts. Meter rates it at around 640 watts. It works just fine but I wasn't expecting the extra 140 watts on my solar system.. Would buy again

### ⭐⭐⭐⭐ Review
*by Y***N on 4 September 2022*

This is a great option for heating water in my car rooftop solar tube. Fit is excellent. ABS 4x4x2 fitting with PVC adapter/reducer and threaded galvanized reducer. I test ran with one element connected. It drew 175 watts. When I connected the second it drew 350 watts. Thought folks should know actual power usage.

## Frequently Bought Together

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-01-22*