Rheem PROPH50 T2 RH400-SO Running Cost (Electric Water…
What the Rheem PROPH50 T2 RH400-SO costs to run
The Rheem PROPH50 T2 RH400-SO is certified by ENERGY STAR at 846 kWh a year, cheaper than most models in its category to run among electric water heaters currently certified.
That $159 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 23.4% less, ranking 48 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 $49/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 T2 RH400-SO: Rheem PROPH50 T2 RH400-30 ($159/yr, 846 kWh/yr), then Rheem XE50T10H45U1 ($159/yr, 846 kWh/yr).
Comparing Rheem's own models
Ranked 15 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).
Rheem PROPH50 T2 RH400-SO 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 Rheem PROPH50 T2 RH400-SO that long and it costs about $1,750 in electricity, on top of whatever it cost to buy.
Is it worth replacing?
Efficient as certified electric water heaters go, $159/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
Whether or not the Rheem PROPH50 T2 RH400-SO ever needs replacing, a repair is the more common failure for a electric water heater, one a protection plan budgets for ahead of time.
Where this number comes from
At rank 48 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. The 846 kWh/yr figure is ENERGY STAR's own certification, not a wattage estimate; exact dataset IDs are on the data sources page.