Rheem PROPH50 T0 RH120 Running Cost (Electric Water Heater)
What the Rheem PROPH50 T0 RH120 costs to run
At 1,082 kWh/yr, the Rheem PROPH50 T0 RH120's ENERGY STAR certification puts it about average for its category to run against every other certified electric water heater.
That $203 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.
Efficient, or not, for a electric water heater
Against the category average of 1,105 kWh/yr, this model uses 2.1% less, ranking 288 of 596 electric water heaters tracked here for running cost. That average is drawn from all 596 electric water heaters ENERGY STAR currently certifies, not an outside number, a $4/year gap from this model at the national rate. Full sourcing is in the sourcing notes.
Right next to it on the list
A rank or two either side of the Rheem PROPH50 T0 RH120: Friedrich PROH50 T0 FD120 ($203/yr, 1,082 kWh/yr), then Rheem XE50T10H15U0 ($203/yr, 1,082 kWh/yr).
Comparing Rheem's own models
Ranked 50 of Rheem's 77 certified electric water heaters, this sits between the PROPH40 T0 RH120-M ($147/yr, the brand's cheapest) and the XE80T10HMS00U0 ($264/yr, its priciest).
What this adds up to over time
Over the 11-year service life NAHB reports for this category, running the Rheem PROPH50 T0 RH120 costs roughly $2,238 in electricity, separate from the purchase price.
Is it worth replacing?
Efficient as certified electric water heaters go, $203/year is a reasonable baseline if you're comparing what else is on the market.
Compare current ENERGY STAR certified electric water heaters before buying.
If you're keeping it
The Rheem PROPH50 T0 RH120 already costs $203/year to run; a repair bill on top of that is the kind of expense a protection plan exists to smooth out.
Where this number comes from
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.