Running cost for the Giant GTHPCO-45 1**+GTXST-80 1**
The Giant GTHPCO-45 1**+GTXST-80 1** is certified by ENERGY STAR at 1,306 kWh a year, more expensive than most models in its category to run among electric water heaters currently certified.
That $246 is priced at 18.8¢/kWh, the average of all 51 state rates this site tracks. Your own state's rate is one click away.
How the Giant GTHPCO-45 1**+GTXST-80 1** compares to other electric water heaters
The category average is 1,105 kWh/yr; this model runs 18.2% above it, ranking 477 of 596 electric water heaters tracked here for running cost. 596 certified electric water heaters, one average, about $38/year of daylight between it and this model; the full methodology has the rest.
Neighbouring models
Right next to the Giant GTHPCO-45 1**+GTXST-80 1** on that list: American MHPCO-45 1**+MXST-80TTP 1** ($246/yr, 1,306 kWh/yr) runs slightly less, while Giant GTHPCO-45 1**+GTXST-80TTP 1** ($246/yr, 1,306 kWh/yr) runs slightly more.
Within the Giant lineup
Ranked 10 of Giant's 13 certified electric water heaters, this sits between the GTHPCO-45 1**+GTXST-50LBTTP 1* ($172/yr, the brand's cheapest) and the GTHPCO-45 1**+GTXST-66TTP 1** ($252/yr, its priciest).
Cost over its typical lifespan
NAHB's Study of Life Expectancy of Home Components puts a typical electric water heater's service life at 11 years; run the Giant GTHPCO-45 1**+GTXST-80 1** that long and it costs about $2,701 in electricity, on top of whatever it cost to buy.
Is it worth replacing?
The Giant GTHPCO-45 1**+GTXST-80 1** 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 $246/year every year.
Compare current ENERGY STAR certified electric water heaters before buying.
If you're keeping it
Whether or not the Giant GTHPCO-45 1**+GTXST-80 1** ever needs replacing, a repair is the more common failure for a electric water heater, one a protection plan budgets for ahead of time.
How this was checked
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. The 1,306 kWh/yr figure is ENERGY STAR's own certification, not a wattage estimate; exact dataset IDs are on the data sources page.