Will this heater work for a 450 gal tank to keep water from freezing?

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...

I will be connecting this directly to my solar panel. My solar panel puts out 12-21 volts. Will 21v damage the element?

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.

What is the resistance of the element aka how many ohms is it

The element which is made of sus304 has 0.48 ohms. Thank you

what size bulkhead do folks use for this? Any links to one?

12 volt 300 watt will take a long time to heat up i use a 48 volt 1000 watt element with batterys

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

DERNORD 12V 500W Immersion Heater Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch NPSM Fitting Double U Type

DERNORD 12V 500W Immersion Heater Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch NPSM Fitting Double U Type

Product ID: 504360711

Details

Brand
DERNORD
Color
White
Item Length
6.89 inches
Material
Stainless
Voltage
12 volts

⚡12V DC power compatibility

🔥500W rapid heating output

🔩1" NPSM flange fits US standard tanks

¥9978

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Description

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

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.

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.

Specifications

ASIN	B0BCW28DNW
Best Sellers Rank	#93,602 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #146 in Water Heater Replacement Parts
Brand Name	DERNORD
Color	White
Customer Reviews	4.2 4.2 out of 5 stars (8)
Item Length	6.89 inches
Item Weight	0.33 kg
Manufacturer	DERNORD
Material Type	Stainless Steel
Number of Items	1
Unit Count	1 Count
Voltage	12 volts
Wattage	500 watts

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.