I would like to top mount the element, but a small amount of the tube won't be covered with water. Will that be a problem? Denord please.

Yes it will . Needs to be covered with water at all times to keep it from overheating . Overheating will damage the unit .needs to be at least 4to6 inches under water at all times .p

What if you have lower amperage? instead of 12, maybe 3-5 amps. will it still work? just not get as hot?

Its 12 volts, not 12 amps. If you have 12v and 3 - 5 amps you will get maybe 36 - 60 watts. It won't get very hot.

Can this be used hooked straight to a 100w solar panel?

150w element 100w panel no offense do the math. It will heat but at 12v 150w takes 4 hrs to heat 5 gallons of water so I doubt your getting a solid 5 hrs full output. Not recommended but might limp through.

Is the internal wire heavy enough to connect 24v and get 600 watts (i.e. double the amps)? Thanks!

Hi, I don't think it's possible, you would shorten life to the resistance. I recommend that if you are going to use 24V, connect them in series.

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DERNORD 12V 150W Immersion Heater Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch NPSM Flange

DERNORD 12V 150W Immersion Heater Submersible Water Heater Element Stainless Steel Heating Element with 1 Inch NPSM Flange

Product ID: 745444007

Details

Brand
DERNORD
Colour
silver
Item length
6.89 Inches
Material
Stainless
Voltage
12 Volts

🔋12V battery & solar compatible

⚙️1" NPSM flange fits US tanks

🛡️UL & CUL safety certified

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Description

🔥 Stay warm, stay ahead — power your water with precision! ⚡

MULTI USE MAGIC - Ideal for caravans, boats, workshops, biodiesel production, and home brewing enthusiasts.
UNIVERSAL FIT ZERO HASSLE - 1-inch NPSM flange ensures easy installation on standard or custom water tanks.
POWER YOUR OFF GRID LIFESTYLE - Seamlessly connects to batteries, solar panels, and wind turbines for eco-smart heating.
WINTER PROOF YOUR WATER SUPPLY - Prevents freezing in livestock drinkers and ponds with smart thermostat compatibility.
BUILT TO LAST BUILT FOR SAFETY - Durable stainless steel with electropolish finish resists corrosion and meets UL/CUL standards.

The DERNORD 12V 150W Immersion Heater is a corrosion-resistant stainless steel heating element designed for versatile water heating applications. Compatible with 12V batteries, solar, and wind power, it features a standard 1" NPSM flange for easy installation and meets UL/CUL safety certifications. Perfect for off-grid setups, winter freeze prevention, and specialty uses like biodiesel and brewing.

Specifications

ASIN	B0761L2Q8M
Best Sellers Rank	#164,201 in Kitchen ( See Top 100 in Kitchen ) #405 in Electric Heating
Brand Name	DERNORD
Color	silver
Customer Reviews	4.3 4.3 out of 5 stars (140)
Item Length	6.89 Inches
Item Weight	231 g
Manufacturer	DERNORD
Material Type	Stainless Steel
Number of Items	1
Part Number	DERNORD-51
UPC	717643521518
Unit Count	1.0 Count
Voltage	12 Volts
Wattage	150 watts

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