Carnot Labs, Inc. N51: running cost
ENERGY STAR certifies the Carnot Labs, Inc. N51 at 1,404 kWh/yr, one of the more expensive models in its category to run for its category.
The $264 figure above uses the simple average of all 51 published state rates. Pick your state for the real number.
Where this ranks
That's 27.1% above the electric water heater category average of 1,105 kWh/yr, and ranks 564 of 596 certified electric water heaters for annual running cost, 1 being cheapest. Every one of the 596 currently-certified electric water heaters feeds that average, putting this model about $56/year over it. See how it's calculated on the how it is calculated page.
The closest alternatives by cost
Sorted by running cost among electric water heaters, one step cheaper is Ruud PROUH80 T0 RU120-MSO ($264/yr, 1,403 kWh/yr), and one step pricier is GE Profile PF80S10FPY01 ($266/yr, 1,417 kWh/yr).
Within the Carnot Labs, Inc. lineup
The Carnot Labs, Inc. N51 is the only electric water heater from Carnot Labs, Inc. that ENERGY STAR currently certifies, so there's no same-brand model to weigh it against here, only the full electric water heater category.
Carnot Labs, Inc. N51 over 11 years
NAHB's Study of Life Expectancy of Home Components puts a typical electric water heater's service life at 11 years; run the Carnot Labs, Inc. N51 that long and it costs about $2,903 in electricity, on top of whatever it cost to buy.
Is it worth replacing?
The Carnot Labs, Inc. N51 runs above its category average. If the electric water heater you actually own is older still, likely well past ENERGY STAR's efficiency baseline when it was made, a current certified model could cost meaningfully less than this model's $264/year every year.
Worth comparing a few current certified models before deciding.
Protecting what you have
A electric water heater like the Carnot Labs, Inc. N51 is a real household expense whether or not it needs replacing yet; a protection plan is one way to budget for a repair rather than a full replacement.
The data behind this page
Two sourced numbers, nothing modeled: ENERGY STAR's certified kWh/yr for this exact model, and EIA's published state electricity rate. The full Electric Water Heater category page shows all 596 electric water heaters ranked by cost; the state-rate guide covers the half of this number that isn't the appliance.