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AC on Battery

1604 Views 12 Replies 9 Participants Last post by  jcanoe
So I'm at the dealer today in the hope they will update the backfire issue. The SA said it takes a long time (to hook the thing to a computer and walk away???). Anyway, I drained the battery so if they had to go for a joy ride they could experience the issue quickly. I got to wondering with my drained battery about how long the AC would run on almost no battery while sitting at a traffic light. I know a lot of start/stop cars will start the engine after a minute or so sitting with the AC on. So how long will the Volt be able to run the AC at a light if there is effectively no battery left before it starts the engine?
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The car uses about a kilowatt hour of battery as working buffer for the engine, and at the start of your time at the light you'll likely be near the top of that. I don't think it'll let you spend the whole thing on A/C, since that would mean poor acceleration, but I think it does allow ~300 Wh before cycling. That's around 3 minutes of 6 kW full load initial cooling the car on a really hot day, or close to twenty minutes of 1 kW keeping the car cool in typical summer conditions.
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