Technologies

The electric tank, and when it is genuinely the right call

Simple, cheap to install, and the most expensive thing on this page to run. In most Central Valley homes it is the right answer only when a heat pump will not physically fit, and being honest about that is more useful than pretending the choice is close.

How it works

One or two electric elements sit inside an insulated tank and heat the water directly, the same way a kettle does. There is no combustion, no flue and no gas connection, which makes it the simplest installation of the four and the easiest to put almost anywhere.

It is also close to one hundred percent efficient at converting electricity into heat, which sounds excellent until you compare it with a heat pump that moves three or four times as much heat for the same electricity.

Good fit when

You are replacing an existing electric tank and the budget is tight
There is no room or airflow for a heat pump
The space is an interior closet with no condensate route
Upfront budget is the binding constraint
It is a rental, an accessory unit or a low-use property

Think twice when

You have a garage or utility space that would take a heat pump
You are switching from gas expecting to save money
The household uses a lot of hot water
You are eligible for a heat pump rebate

Switching from gas to this will cost you money

This is the case worth being blunt about. On our Turlock model an electric resistance tank costs between about $421 and $595 a year to run, against roughly $458 for the gas tank it would replace. At the bottom TID tier you come out a little ahead, and at the top tier you are around $137 a year worse off.

When people say electrification saves money, the saving is coming from the efficiency of the heat pump rather than from the price of electricity. Swapping a gas tank for a resistance tank captures none of that and gives up the cheaper fuel.

Where it does make sense: replacing an existing electric tank, or any space that physically cannot host a heat pump. Those are real situations and this is a perfectly good product for them. It is simply not an upgrade from gas.

What it costs

We model the installed price from the equipment price, because you can look up the box and you cannot look up everything that gets added to it. Ranges only, and never a single average.

Rule of thumb: roughly 2 to 2.5 times the shelf price of the unit
Equipment, retail: $700 to $1,900
Typical installed: $1,700 to $3,200
Time on site: 2 to 3 hours on site

What the work portion buys

Labour for a like-for-like swap
Permit and inspection
Code items and a drain pan where required
Hauling the old unit away

Source: Water Heater Advisor price model, calibrated against Stanislaus County contractor pricingChecked 7 Aug 2026

What it costs to run

Between about $421 and $595 a year in Turlock depending on your TID tier, which makes it the most expensive of the four to run and the only one that can cost more than the gas tank it replaced.

Those figures come from our Turlock fuel model, which is the one market where we hold both published utility rates. They will be in the right region for anywhere nearby and they are not a national average, so treat them as a comparison between technologies rather than a prediction of your bill.

Who makes it

Brand comes after technology, always. Once you have settled on this one, these are the manufacturers we hold research for.

Rheem
A. O. Smith
Bradford White

Solid entries have a page. Dashed entries are in the research but not yet written up, and we would rather show you that than link you nowhere. All brands

Ask your installer these

Would a heat pump fit this space, and what would it cost here?
Is the existing circuit adequate for this unit?
Is this a straight swap, or does anything have to move?
Is the permit in this price?
What size do you recommend, and why that one?

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