Model
Summit SLWW2403
Rank #172 means 171 of the 388 washing machine models we track cost less to run each year; the 10th efficiency percentile means it uses less energy for its size than 10% of those models.
What does the Summit SLWW2403 cost to run per year?
The Summit SLWW2403 costs about $20 a year to run, a middle-of-the-pack figure at rank #172 of 388. Once capacity is factored in, its efficiency percentile of 10 is among the lowest in its class. At a IMEF of 2.07, its integrated modified energy factor is the single figure that best explains how it earns its running-cost number.
Immediately around it on the leaderboard, the Summit LWES247 at $20/yr runs a little cheaper and the Vesta VWSHongkong27WH at $20/yr runs a little more, a sense of how tightly models are packed at this point in the ranking. A washing machine typically stays in service for somewhere around 10 years; over that span, the Summit SLWW2403's $20/yr adds up to roughly $200 in electricity alone, before purchase price or repairs.
Also sold as: Aeg W14120.
By the numbers
The Summit SLWW2403 normalized against its whole class, so each figure means something.
What it costs you over time
Running cost is an every-year number, so it compounds. At $20/yr, here is what the Summit SLWW2403 adds up to before purchase price, water, or repairs enter the math.
Left running for a decade at today's US average rate, the Summit SLWW2403 costs about $200. That is roughly $0 less than the class median, which would run closer to $200 over the same ten years.
How the Summit SLWW2403 compares
The washing machine class we track runs from $7 to $58 a year. At $20/yr, it sits right on the class median of $20, and it is about $13 a year more than the cheapest washing machine to run at $7.
What drives its running cost
At 2.2 cu ft, the Summit SLWW2403 is a small washing machine for its class, which spans 1.9 to 6 cu ft with a median of 4.5 cu ft, less capacity to service is usually the first reason a running-cost figure lands on the low side, before efficiency even enters the picture. Its IMEF of 2.07, below the class median of 2.76, reflects integrated modified energy factor: a higher figure means it wrings more useful work out of every kilowatt-hour, so it is the efficiency lever to weigh against raw size.
- Spin and wash efficiency (IMEF). A higher Integrated Modified Energy Factor means the machine wrings more useful washing (and a drier spin) out of every kilowatt-hour and gallon it uses.
- Drum volume. Drum volume sets the ceiling on how much a single cycle can wash, and it is usually the first driver of a washer's per-cycle energy use.
- Water heating. Cycle temperature, more than drum size, is usually what separates a cheap wash cycle from an expensive one on models with an internal water heater.
Common questions
Is the Summit SLWW2403 cheap to run?
It is about average. At $20 a year it ranks #172 of 388 washing machine models we track, close to the middle of its class on running cost.
How much does the Summit SLWW2403 cost per month?
Roughly $1.7/mo, spreading the $20/yr estimate evenly across twelve months at $0.1856/kWh. Actual monthly bills swing with your rate and usage pattern.
How is this running-cost figure calculated?
We take the model's published annual energy use of 110 kWh from ENERGY STAR and multiply it by the US average residential electricity rate of $0.1856/kWh, giving about $20 a year. It is an electricity-only estimate and does not include purchase price, water, or installation.
How efficient is the Summit SLWW2403 for its size?
10th percentile once size is factored in, a fairly typical result for the class.
Cheaper to run in the same class
| Rank | Model | Cost/yr |
|---|---|---|
| 199 | Summit LWES2472.2 cu ft | $20 |
| 198 | Samsung WV60A99**A*5 cu ft | $20 |
| 197 | Samsung WF50T85**A*5 cu ft | $20 |
| 196 | Samsung WF50A85**A*5 cu ft | $20 |
| 195 | Midea MLH52S7AWW5.2 cu ft | $20 |
Source
ES_92282_SLWW2403_040820251247447_4049922View certified washing machine listingsENERGY STAR data as of July 2026Summit and SLWW2403 are used here for identification only and are not endorsements. Figures are computed by WattWise Labs from public ENERGY STAR data, not measured in our own lab.