What the Keplerx KARC12RSVE1 costs to run
The Keplerx KARC12RSVE1 is certified by ENERGY STAR at 600 kWh a year, about average for its category to run among room air conditioners currently certified.
That $113 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.
Efficient, or not, for a room air conditioner
Against the category average of 603 kWh/yr, this model uses 0.5% less, ranking 282 of 447 room air conditioners tracked here for running cost. That average is drawn from all 447 room air conditioners ENERGY STAR currently certifies, not an outside number, a $1/year gap from this model at the national rate. Full sourcing is in the sourcing notes.
Right next to it on the list
A rank or two either side of the Keplerx KARC12RSVE1: Insignia NS-AC12WWH5-C ($113/yr, 600 kWh/yr), then Keystone KSTAW121WA ($113/yr, 600 kWh/yr).
Within the Keplerx lineup
Ranked 3 of Keplerx's 6 certified room air conditioners, this sits between the KARC8RSVE1 ($75/yr, the brand's cheapest) and the KBRC24RSVE2 ($254/yr, its priciest).
What this adds up to over time
Over the 10-year service life NAHB reports for this category, running the Keplerx KARC12RSVE1 costs roughly $1,128 in electricity, separate from the purchase price.
Is it worth replacing?
Efficient as certified room air conditioners go, $113/year is a reasonable baseline if you're comparing what else is on the market.
Worth comparing a few current certified models before deciding.
If you're keeping it
The Keplerx KARC12RSVE1 already costs $113/year to run; a repair bill on top of that is the kind of expense a protection plan exists to smooth out.
Where this number comes from
Two sourced numbers, nothing modeled: ENERGY STAR's certified kWh/yr for this exact model, and EIA's published state electricity rate. The full Room Air Conditioner category page shows all 447 room air conditioners ranked by cost; the state-rate guide covers the half of this number that isn't the appliance.