Rheem PROPH50 T0 RH120-MSO Running Cost (Electric Water…
Running cost for the Rheem PROPH50 T0 RH120-MSO
At 1,072 kWh/yr, the Rheem PROPH50 T0 RH120-MSO's ENERGY STAR certification puts it about average for its category to run against every other certified electric water heater.
That $202 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 3% less, ranking 280 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 $6/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-MSO: Rheem PROPH50 T0 RH120-M ($202/yr, 1,072 kWh/yr), then Rheem XE50T10HM00U0 ($202/yr, 1,072 kWh/yr).
Comparing Rheem's own models
Ranked 47 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).
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 Rheem PROPH50 T0 RH120-MSO that long and it costs about $2,217 in electricity, on top of whatever it cost to buy.
Shopping for a new one
Efficient as certified electric water heaters go, $202/year is a reasonable baseline if you're comparing what else is on the market.
Worth comparing a few current certified models before deciding.
If you're keeping it
At $202/year just to run, a electric water heater is worth protecting against an unplanned repair bill on top of that.
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. At rank 280 of 596 for running cost, see the electric water heater category page for the rest of the field, or the guide to how much your state matters.