--- product_id: 504360711 title: "12V 500W Immersion Heater Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch NPSM Fitting Double U Type" brand: "dernord" price: "€ 63.20" currency: EUR in_stock: true reviews_count: 1 url: https://www.desertcart.hr/products/504360711-12v-500w-immersion-heater-submersible-water-heater-element-stainless-steel store_origin: HR region: Croatia --- # 12V DC power compatibility 500W rapid heating output 1" NPSM flange fits US standard tanks 12V 500W Immersion Heater Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch NPSM Fitting Double U Type **Brand:** dernord **Price:** € 63.20 **Availability:** ✅ In Stock ## Summary > 🔥 Power your water heating with smart, sustainable energy! ⚡ ## Quick Answers - **What is this?** 12V 500W Immersion Heater Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch NPSM Fitting Double U Type by dernord - **How much does it cost?** € 63.20 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/504360711-12v-500w-immersion-heater-submersible-water-heater-element-stainless-steel) ## 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 - • **Universal Fit:** 1" NPSM flange designed to fit standard US water tanks or custom setups effortlessly. - • **Plug & Play Power:** Seamlessly connects to batteries, solar panels, and wind turbines for eco-smart heating. - • **Energy-Efficient Backup:** Preheats water ahead of gas heaters, reducing gas usage and cutting energy bills. - • **Smart Freeze Protection:** Ideal for preventing winter freeze in livestock drinkers and outdoor ponds with simple thermostat control. - • **Corrosion-Resistant Stainless Steel:** Electropolished surface ensures durability and longevity in all water types. ## Overview The DERNORD 12V 500W Immersion Heater is a stainless steel, corrosion-resistant submersible heating element designed for versatile use in water tanks, caravans, boats, and renewable energy setups. Featuring a 1" NPSM flange for easy installation, it operates on 12V DC power compatible with batteries, solar panels, and wind turbines. UL and cUL safety listed, it offers reliable freeze protection and energy-efficient preheating to optimize your water heating system. ## Description Product Features 12V 500W 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:500 watts Product Diameter: 8mm Tube length: 175mm Screw Type:1"NPSM Color: White ## Features - 12v DC heater connects with batteries, solar panels, hydroelectric generators and wind turbine dump - 1" NPSM 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 silicone sealing washer which is flexible and waterproof ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B0BCW28DNW | | Best Sellers Rank | #131,017 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #241 in Water Heater Replacement Parts | | Brand Name | DERNORD | | Color | White | | Customer Reviews | 4.2 4.2 out of 5 stars (8) 4.2 out of 5 stars | | Item Length | 6.89 Inches | | Item Weight | 0.33 Kilograms | | Manufacturer | DERNORD | | Material Type | Stainless Steel | | Unit Count | 1.0 Count | | Voltage | 12 Volts | | Wattage | 500 watts | ## Product Details - **Brand:** DERNORD - **Color:** White - **Item Length:** 6.89 Inches - **Material:** Stainless Steel - **Voltage:** 12 Volts ## Images ![12V 500W Immersion Heater Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch NPSM Fitting Double U Type - Image 1](https://m.media-amazon.com/images/I/61JG2VFbzhL.jpg) ## Available Options This product comes in different **Size** options. ## 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.. Just abit more then 500 watts *by on Reviewed in Canada September 13, 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 ## Frequently Bought Together - DERNORD 12V 500W Immersion Heater Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch NPSM Fitting Double U Type - Beduan 1" Female Bulkhead Water Tank Connector Stainless Steel Thru-bulk Fitting --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/504360711-12v-500w-immersion-heater-submersible-water-heater-element-stainless-steel](https://www.desertcart.hr/products/504360711-12v-500w-immersion-heater-submersible-water-heater-element-stainless-steel) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-10*