electronics · 15W typical

Running a ups (uninterruptible power supply) costs about $1.78/month.

That's the typical ups (uninterruptible power supply) at 15W, run 24 hours a day at the US-average rate of 16.5¢/kWh. Change any of those and the number moves — use the calculator below to see yours.

Estimated cost

$1.78/month

$0.06 per day$21.68 per year10.8 kWh monthly

Wattage

Hours / day

Your rate

Full-power draw for 24 hours at 16.5¢/kWh.

How you use it

Cost shifts with how long it's on.

The same ups (uninterruptible power supply) can cost very different amounts depending on usage patterns. Three common scenarios, at the US-average rate.

always-on protection

$1.78

per month

continuous battery maintenance

24 hrs/day·$21.68/yr

Where you live

$3.23 spread between the cheapest and priciest states.

Same appliance, same hours of use, different zip code — the monthly cost varies this much.

State	Rate	Monthly	Yearly
Hawaii	41.2¢	$4.45	$54.14
California	31.4¢	$3.39	$41.26
Massachusetts	30.8¢	$3.33	$40.47
Connecticut	28.7¢	$3.10	$37.71
Rhode Island	27.9¢	$3.01	$36.66
New Hampshire	24.6¢	$2.66	$32.32
Alaska	24.3¢	$2.62	$31.93
New York	22.3¢	$2.41	$29.30
Maine	22.1¢	$2.39	$29.04
Vermont	21.5¢	$2.32	$28.25
Michigan	19.3¢	$2.08	$25.36
New Jersey	19.1¢	$2.06	$25.10
Maryland	18.4¢	$1.99	$24.18
Pennsylvania	18.1¢	$1.95	$23.78
District of Columbia	17.8¢	$1.92	$23.39
Wisconsin	17.4¢	$1.88	$22.86
Delaware	17.2¢	$1.86	$22.60
Illinois	16.9¢	$1.83	$22.21
Ohio	16.6¢	$1.79	$21.81
Nevada	16.3¢	$1.76	$21.42
Indiana	15.8¢	$1.71	$20.76
Virginia	15.7¢	$1.70	$20.63
Minnesota	15.6¢	$1.68	$20.50
Colorado	15.4¢	$1.66	$20.24
Alabama	15.2¢	$1.64	$19.97
West Virginia	15.2¢	$1.64	$19.97
Florida	15.1¢	$1.63	$19.84
New Mexico	14.8¢	$1.60	$19.45
Texas	14.8¢	$1.60	$19.45
Arizona	14.7¢	$1.59	$19.32
South Carolina	14.7¢	$1.59	$19.32
Kansas	14.6¢	$1.58	$19.18
Georgia	14.2¢	$1.53	$18.66
Iowa	14.1¢	$1.52	$18.53
North Carolina	13.9¢	$1.50	$18.26
Missouri	13.6¢	$1.47	$17.87
Oregon	13.4¢	$1.45	$17.61
Tennessee	13.3¢	$1.44	$17.48
Kentucky	13.2¢	$1.43	$17.34
Mississippi	13.1¢	$1.41	$17.21
Oklahoma	13.1¢	$1.41	$17.21
South Dakota	12.7¢	$1.37	$16.69
Montana	12.4¢	$1.34	$16.29
Nebraska	12.2¢	$1.32	$16.03
Arkansas	12.1¢	$1.31	$15.90
Washington	12.1¢	$1.31	$15.90
Louisiana	11.9¢	$1.29	$15.64
Wyoming	11.6¢	$1.25	$15.24
North Dakota	11.5¢	$1.24	$15.11
Utah	11.4¢	$1.23	$14.98
Idaho	11.3¢	$1.22	$14.85

Efficient vs. inefficient

A $65.04/year difference across the wattage range.

Swapping a high-draw model for an efficient one pays for itself. Here's what that looks like annually at typical usage.

Most efficient

$0.59 per month

$7.23 per year

Typical

15W

$1.78 per month

$21.68 per year

High draw

50W

$5.94 per month

$72.27 per year

When it hits hardest

year-round peak

24/7 always-on.

Ways to cut the cost

1
Replace batteries every 3-5 years — worn batteries force UPS to draw more
Maintains spec efficiency
2
Right-size the UPS — 2x oversized unit wastes watts
Correct sizing cuts idle watts 20-40%
3
Plug only critical gear into UPS — keeps load low
Smaller loads run cooler and more efficiently

Real-world wattages

Pulled from actual spec sheets.

Brand	Model	Watts
APC	Back-UPS BX1500M	15W
CyberPower	CP1500PFCLCD	20W
Tripp Lite	SMART1500LCD	18W

Picks that actually move the needle

Three products worth comparing if you're thinking about upgrading or supplementing what you have.

Some links below are affiliate links. If you buy, we may earn a small commission — it never changes the price you pay, and we only recommend picks we would stand behind.

APC Back-UPS BX1500M 1500VA

15W typical — efficient battery maintenance

$200-260

CyberPower CP1500PFCLCD

Pure sine wave for sensitive electronics

$220-280

Kill A Watt P3 P4460 Meter

Verify actual draw — older UPS units drift up

$28-35