Navien NWP500S050AUMB Running Cost (Electric Water Heater)
Running cost for the Navien NWP500S050AUMB
The Navien NWP500S050AUMB is certified by ENERGY STAR at 840 kWh a year, cheaper than most models in its category to run among electric water heaters currently certified.
That $158 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 Navien NWP500S050AUMB compares to other electric water heaters
Against the category average of 1,105 kWh/yr, this model uses 24% less, ranking 32 of 596 electric water heaters tracked here for running cost. 596 certified electric water heaters, one average, about $50/year of daylight between it and this model; the full methodology has the rest.
Neighbouring models
Right next to the Navien NWP500S050AUMB on that list: Richmond 10CE50-HP5S30 ($157/yr, 837 kWh/yr) runs slightly less, while Rinnai REHP50 ($159/yr, 844 kWh/yr) runs slightly more.
Within the Navien lineup
Of the 3 ENERGY STAR certified electric water heaters Navien makes, the NWP500S050AUMB is the cheapest to run, $80/year less than Navien's priciest, the NWP500S080AUMB.
What this adds up to over time
NAHB's Study of Life Expectancy of Home Components puts a typical electric water heater's service life at 11 years; run the Navien NWP500S050AUMB that long and it costs about $1,737 in electricity, on top of whatever it cost to buy.
Weighing a replacement
Efficient as certified electric water heaters go, $158/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
A electric water heater like the Navien NWP500S050AUMB is a real household expense whether or not it needs replacing yet; a protection plan is one way to budget for a repair rather than a full replacement.
How this was checked
Ranked 32 of 596, the Navien NWP500S050AUMB 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 840 kWh/yr figure is ENERGY STAR's own certification, not a wattage estimate; exact dataset IDs are on the data sources page.