Rinnai REHP50BM Running Cost (Electric Water Heater)
Running cost for the Rinnai REHP50BM
At 844 kWh/yr, the Rinnai REHP50BM'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.
Efficient, or not, for a electric water heater
Against the category average of 1,105 kWh/yr, this model uses 23.6% less, ranking 34 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 Rinnai REHP50BM: Rinnai REHP50 ($159/yr, 844 kWh/yr), then Rinnai REHP50C ($159/yr, 844 kWh/yr).
Same brand, different models
Ranked 2 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).
What this adds up to over time
Over the 11-year service life NAHB reports for this category, running the Rinnai REHP50BM costs roughly $1,745 in electricity, separate from the purchase price.
Shopping for a new one
Efficient as certified electric water heaters go, $159/year is a reasonable baseline if you're comparing what else is on the market.
See what else is certified in this category before you decide.
If you're keeping it
Whether or not the Rinnai REHP50BM 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
Nothing here is estimated from a nameplate wattage; the 844 kWh/yr is ENERGY STAR's own certified figure for this model. At rank 34 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.