Watts

Typical figures for this type, from the sources at the foot of this page. Watts vary by model and age. Check the label on your own appliance and enter it for an exact answer.

Running, typical
1,714 W
Running, low to high
1,500 W to 2,000 W
Starting
3,150 W2,800 W to 3,500 W, 1.8 times running
Typical use a day
8 hhours the motor actually runs
Average draw while on
1,714 W
Voltage
120 V
  • Assumes the motor runs the whole time; real use is often less.

The math

Worked with the typical figure, as the calculator does it.

  1. Output1,714 W running, so the station's continuous output must be at least 1,714 W.
  2. Surge3,150 W to start, so its surge rating must be at least 3,150 W.
  3. Average draw1,714 W: the running watts count for every hour it is on, as if the motor never paused.
  4. A typical day1,714 W × 8 h = 13,712 Wh a day.
  5. 8 hours of running1,714 W × 8 h = 13,712 Wh usable, ÷ 0.85 = 16,132 Wh of rated capacity.
  6. 24 hours of running1,714 W × 24 h = 41,136 Wh usable, ÷ 0.85 = 48,395 Wh of rated capacity.
  7. On the BLUETTI Elite 100 V21,024 Wh × 0.85 = 870 Wh usable, ÷ 1,714 W = 30 min.

Stations that run it

Every power station in the data with this appliance alone plugged in, at 85% efficiency. Type the running watts from your own label and the table works it out again.

Add it to the runtime calculator with the rest of your list

What moves the number

A 13,500 BTU rooftop unit draws about 1,714 W with the compressor and fan running and needs about 3,150 W to start. A soft start kit lowers that start; heat and humidity raise the running draw. The 8 hours a day counts the compressor running nonstop.

An RV air conditioner works out every station for a day of cooling.

Questions

How many watts does an RV rooftop air conditioner (13,500 BTU) use?
About 1,714 W while running, from 1,500 W to 2,000 W across the models in our sources. It needs about 3,150 W for a moment at start. Watts vary by model and age. Check the label on your own appliance and enter it for an exact answer.
Can a portable power station run an RV rooftop air conditioner (13,500 BTU)?
Yes. 33 of the 54 power stations in the Enough Watts data set can power it on its own. It takes at least 1,714 W of continuous output and a surge rating of 3,150 W.
How long will a power station run an RV rooftop air conditioner (13,500 BTU)?
It depends on the battery. At 85% efficiency the smallest station that powers it, the BLUETTI Elite 100 V2 (1,024 Wh), gives about 30 min. The largest, the EcoFlow DELTA Pro Ultra X (12,288 Wh), gives about 6.1 h.
Why does an RV rooftop air conditioner (13,500 BTU) need a high surge rating?
Its motor draws about 3,150 W for a moment at start, 1.8 times its 1,714 W running figure. A station whose surge rating is below that cannot start it, even when the continuous output is enough. 33 of the 54 stations pass that check.

Setups that include it

Sources

Researched from these pages, then checked against them a second time.

  1. Generator Wattage Chart - Champion Power Equipment generator maker guide, checked
  2. Dometic Rooftop Air Conditioner (Air Distribution Box, Mechanical Controls) - Installation and Operating Manual AMER3 maker manual, checked
  3. Dometic FreshJet 5 Series 13.5K | Dometic maker product page, checked

We read published figures and do the math; we do not measure appliances. The methodology states every formula on this page. Capacities are rated watt hours: 1,000 Wh rated gives 850 Wh usable at the default.