WattCost

Data through April 2026

Running cost · Water Heaters (Electric) · ENERGY STAR certified

Navien NWP500S065AUMB

Heating a typical household's hot water, the Navien NWP500S065AUMB is certified at 1,245 kWh a year — about $234 at the U.S. average electricity rate, or $19.54 a month. That's close to the middle of the certified pack — about 15% above the median electric water heater, ranked 398 of 566. The same unit costs $154 a year in North Dakota but $580 in Hawaii — electricity rates, not the appliance, make the difference.

Estimated annual running cost · U.S. average rate 18.8¢/kWh

$234/yr

$121 · cheapest certified water heaters (electric)$328 · priciest
Per month
$19.54
Per day
64¢
Certified use
1,245 kWh/yr
Type
Hybrid/Electric Heat Pump
Heat pump type
240 Volt Integrated HPWH
Storage volume
61 gal
First-hour rating
80 gal
UEF
4.03
643 kWh1,741 kWh
Where the Navien NWP500S065AUMB (▮) sits among all 566 certified water heaters (electric), by annual kWh

What it costs in every state

Navien NWP500S065AUMB: 1,245 kWh/yr × each state's average residential rate (EIA)
StateRate ¢/kWhThis model $/yrRelative cost
Alabama17.4¢$217
Alaska27.4¢$341
Arizona15.5¢$193
Arkansas14.2¢$176
California35.3¢$439
Colorado16.5¢$206
Connecticut32.2¢$401
Delaware18.8¢$234
District of Columbia25.4¢$316
Florida15.4¢$191
Georgia15.4¢$191
Hawaiipriciest46.6¢$580
Idaho12.7¢$158
Illinois20.5¢$255
Indiana17.9¢$223
Iowa13.9¢$173
Kansas15.8¢$196
Kentucky15.0¢$187
Louisiana14.4¢$180
Maine28.4¢$354
Maryland22.1¢$275
Massachusetts29.4¢$367
Michigan21.4¢$266
Minnesota16.4¢$204
Mississippi16.8¢$209
Missouri14.0¢$174
Montana13.9¢$173
Nebraska13.3¢$165
Nevada14.3¢$178
New Hampshire27.2¢$339
New Jersey23.5¢$293
New Mexico15.2¢$189
New York29.4¢$367
North Carolina16.3¢$202
North Dakotacheapest12.3¢$154
Ohio19.5¢$243
Oklahoma13.3¢$166
Oregon15.8¢$196
Pennsylvania21.5¢$267
Rhode Island28.3¢$352
South Carolina17.1¢$212
South Dakota14.5¢$181
Tennessee14.9¢$186
Texas17.0¢$212
Utah13.3¢$165
Vermont24.6¢$306
Virginia17.4¢$216
Washington14.4¢$179
West Virginia16.1¢$200
Wisconsin19.2¢$239
Wyoming14.7¢$183

Certified models closest in efficiency

electric water heaters within reach of 1,245 kWh/yr
ModelkWh/yr$/yr (US avg)
1HVAC ACIQ-80G-HP-WH1,240$233
ACIQ ACIQ-80G-HP-WH1,240$233
Alsetria HPWH - 65G1,240$233
Alsetria HPWH-80G1,240$233
Bosch TR7000T-65US1,240$233
Bosch TR7000T - 80US1,240$233

Run your own numbers

Your rate, your numbers

Per day
64¢
Per month
$19.54
Per year
$234

1,245 kWh/yr × 18.8¢/kWh = $234/yr

Prefilled with this model's certified 1,245 kWh/yr — adjust if your usage differs from the DOE test basis. The certified annual kWh comes from the DOE Uniform Energy Factor test, which simulates a typical household's daily hot-water draw pattern. Only electric models (including heat-pump units) are listed — gas models burn gas, not kWh.

Questions, answered with the data

How much electricity does the Navien NWP500S065AUMB use?
ENERGY STAR certifies the Navien NWP500S065AUMB at 1,245 kWh per year. The certified annual kWh comes from the DOE Uniform Energy Factor test, which simulates a typical household's daily hot-water draw pattern. Only electric models (including heat-pump units) are listed — gas models burn gas, not kWh.
How much does the Navien NWP500S065AUMB cost to run per month?
About $19.54 a month at the U.S. average residential rate (18.8¢/kWh) — 64¢ a day, or $234 a year. Your state's rate moves this up or down; see the table above.
Is the Navien NWP500S065AUMB energy efficient?
It uses 15% more electricity than the median certified electric water heater.
What does the Navien NWP500S065AUMB cost to run in the cheapest vs. priciest state?
At current residential rates it costs about $154 a year in North Dakota (12.3¢/kWh) and $580 in Hawaii (46.6¢/kWh).

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