Rinnai REHP50C Running Cost (Electric Water Heater)
Running cost for the Rinnai REHP50C
At 844 kWh/yr, the Rinnai REHP50C's ENERGY STAR certification puts it cheaper than most models in its category to run against every other certified electric water heater.
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.
How the Rinnai REHP50C compares to other electric water heaters
Against the category average of 1,105 kWh/yr, this model uses 23.6% less, ranking 35 of 596 electric water heaters tracked here for running cost. 596 certified electric water heaters, one average, about $49/year of daylight between it and this model; the full methodology has the rest.
Neighbouring models
Right next to the Rinnai REHP50C on that list: Rinnai REHP50BM ($159/yr, 844 kWh/yr) runs slightly less, while Friedrich PROH50 T2 FD400-30 ($159/yr, 846 kWh/yr) runs slightly more.
Comparing Rinnai's own models
Ranked 3 of Rinnai's 15 certified electric water heaters, this sits between the REHP50 ($159/yr, the brand's cheapest) and the REHP65C ($233/yr, its priciest).
Rinnai REHP50C over 11 years
Over the 11-year service life NAHB reports for this category, running the Rinnai REHP50C costs roughly $1,745 in electricity, separate from the purchase price.
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
$159/year to run is the predictable cost of the Rinnai REHP50C; a protection plan covers the unpredictable one, a repair bill.
How this was checked
Ranked 35 of 596, the Rinnai REHP50C sits in the middle of the electric water heater category, see the guide to why your state changes this number for the other half of the math. The 844 kWh/yr figure is ENERGY STAR's own certification, not a wattage estimate; exact dataset IDs are on the data sources page.