this post was submitted on 18 Mar 2024
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(page 5) 50 comments
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[–] [email protected] 18 points 1 year ago

My buddy's EV does this but without math or worrying sbout ac/dc except to pump it on the stereo that is also plugged in.

[–] [email protected] 2 points 1 year ago (2 children)

My jeep has 3-prong electrical outlets. Not sure how much it will power and i assume you would want to have the car running.

[–] [email protected] 5 points 1 year ago

Just make sure you open the garage first

[–] [email protected] 6 points 1 year ago (4 children)

From the owners manual: "There is a 115 Volt, 150 Watt inverter outlet located on the back of the center console to convert DC current to AC current. This outlet can power cellular phones, electronics and other low power devices requiring power up to 150 Watts."

I don't know if I'd plug in a fridge to that. I was wondering because my father in law's truck has a similar outlet and I know he's blown a fuse using it to power power tools.

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[–] [email protected] 173 points 1 year ago (6 children)

Looking passed the absolutely insane answer here, no one has even brought up the whole issue of AC vs DC. Batteries are DC, while your fridge that plugs into your wall running on AC. I know they make DC ones, but it isn't like they are interchangeable.

[–] [email protected] 70 points 1 year ago (3 children)

Funny thing, most modern refrigerators use DC motors for their compressors so that they can run at variable speeds, so there's likely an inverter that you could bypass if you know the appropriate voltage. The DC ones for RVs are the same internals, just without the inverter.

[–] [email protected] 62 points 1 year ago* (last edited 1 year ago) (1 children)

Correction: they still use AC motors, but those motors don't use line AC. It goes line AC > rectifier > DC > inverter board > variable frequency AC to run the compressor motor.

Most RV fridges just use DC motors, but there are some that use VFDs and AC motors.

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[–] [email protected] 7 points 1 year ago (2 children)

I mean it's probably labeled, right? How hard could it be?

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[–] [email protected] 39 points 1 year ago (6 children)

Chat GTP answer

Sure, let's say you have a typical car battery with a capacity of 60 amp-hours (Ah).

And let's assume you have a small refrigerator that consumes about 100 watts of power when running.

To calculate how long the battery can power the refrigerator, we need to convert the power consumption from watts to amps.

Power (watts) = Voltage (volts) × Current (amps)

Assuming a car battery voltage of 12 volts:

100 watts / 12 volts = 8.33 amps

Now, we can determine the approximate runtime:

60 amp-hours / 8.33 amps ≈ 7.2 hours

So, with a fully charged 60 Ah car battery, you could run the refrigerator for approximately 7.2 hours before the battery is completely drained. However, it's important to note that factors such as battery age, temperature, and other loads on the battery can affect actual performance.

[–] [email protected] 20 points 1 year ago (3 children)

I'd have expected ChatGPT to be able to call out power factor as well. Otherwise you're getting volt-amps, not true wattage

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[–] [email protected] 35 points 1 year ago (1 children)
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