theoldwizard1 wrote:
EDIT : I found one 5,000 BTU window unit that only require 11.5A to run (no start up spec). You could probably have TWO of them on an RV with a 30A power cord assuming they both do NOT start up at the same time.
11.5A (running) for a 5000 BTU/hr air conditioner is horrible; I think that would be the starting (peak) current specification, or else it is for a much larger unit, or something.
The EER (energy efficiency rating) of an air conditioner is defined as cooling (in BTUs) divided by power consumed (in watts). An EER of 11 ish is typical these days for 5000 BTU window air conditioners. That works out to around 4A running. A quick check of specifications online for one or two verifies that this is approximately typical.
SEER is the seasonal energy efficiency rating, and is the EER averaged over a defined set of conditions (inside and outside temperatures, etc.) that is supposed to simulate a cooling season. The actual energy efficiency varies depending on things like the temperature differential between the hot and cold sides, hence the need for something like SEER.