Is electricity expensive in Arizona?

Arizona's residential average of 15.5¢/kWh is 18% below the U.S. average of 18.8¢/kWh, ranking 20 of 51 jurisdictions (1 = cheapest).

What's the cheapest electric water heater to run in Arizona?

Among currently certified models, the Friedrich PROH40 T2 FD400-15 costs the least at about $100 a year at Arizona rates (643 kWh/yr).

How does Arizona compare with other states?

The same median electric water heater costs $134 a year in North Dakota (the cheapest state) and $504 in Hawaii (the priciest). Arizona sits at $167.

Data through April 2026

Cost to run · Arizona · 15.5¢/kWh residential average

How much does it cost to run an electric water heater in Arizona?

$167/yr · median certified model

Residential electricity in Arizona runs 15.5¢/kWh — 18% under the U.S. average — putting the median certified electric water heater at about $167 a year, versus $204 nationally.

In the national ranking, Arizona lands at 20 of 51 for what an electric water heater costs to run. Model choice matters as much as geography: at Arizona rates the most efficient certified model (Friedrich PROH40 T2 FD400-15) costs $100 a year while the most power-hungry (Smart Solar SSG2-ES 120) costs $270 — a spread of $170 every year. For reference, the national extremes are North Dakota (12.3¢/kWh) and Hawaii (46.6¢/kWh); the same median electric water heater would cost $134 and $504 a year there.

Arizona

$167

US average

$204

North Dakota

$134

Hawaii

$504

Median certified electric water heater (1,082 kWh/yr) per year, at each rate

The cheapest water heaters (electric) to run at Arizona rates

Top 10 by certified kWh, priced at 15.5¢/kWh
#	Model	kWh/yr	$/yr in AZ
1	Friedrich PROH40 T2 FD400-15	643	$100
2	Rheem PROPH40 T2 RH375-15	643	$100
3	Rheem PROPH40 T2 RH400-15	643	$100
4	Rheem XE40T10H22U0	643	$100
5	Rheem XE40T10H22U1	643	$100
6	Richmond 10E40-HP515	643	$100
7	Richmond 10E40-HP5U15	643	$100
8	Ruud PROUH40 T2 RU375-15	643	$100
9	Ruud PROUH40 T2 RU400-15	643	$100
10	Eco-Logical OMNI-50HP1-1A	681	$105

Price any model at Arizona rates

Your rate, your numbers

Annual use (kWh)

Electricity rate

Per day: 46¢
Per month: $13.96
Per year: $167

1,082 kWh/yr × 15.5¢/kWh = $167/yr

Prefilled with the median certified electric water heater (1,082 kWh/yr). Every model page on this site carries its exact certified figure.

Questions, answered with the data

How much does it cost to run an electric water heater in Arizona?: About $167 a year for the median ENERGY STAR certified electric water heater, at Arizona's average residential rate of 15.5¢/kWh — that's $13.96 a month.
Is electricity expensive in Arizona?: Arizona's residential average of 15.5¢/kWh is 18% below the U.S. average of 18.8¢/kWh, ranking 20 of 51 jurisdictions (1 = cheapest).
What's the cheapest electric water heater to run in Arizona?: Among currently certified models, the Friedrich PROH40 T2 FD400-15 costs the least at about $100 a year at Arizona rates (643 kWh/yr).
How does Arizona compare with other states?: The same median electric water heater costs $134 a year in North Dakota (the cheapest state) and $504 in Hawaii (the priciest). Arizona sits at $167.

Keep digging

Rate source: US EIA, average residential price of electricity, see methodology.