We know this comment by Shannon Martin is correct and sensible because it was reviewed by Shannon Martin! As a licensed insurance agent, I'm sure she is qualified to talk about uh.. electronics.. hmm

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.

Hello, expert solarpunk here.

TLDR: Car battery is 350Wh. Fridge uses 143W idle, so it'll run a fridge for 2-3 hours.

Explanation below:

Car batteries are lead-acid (sulphuric acid and lead plates).

They discharge according to Peukert's Law as the negatively charged plate gets covered in lead via the acid (electrolyte).

As the battery depletes, the negative plate can begin to take permanent damage, and so you can't discharge a lead-acid deeper than 10-20%, or about 10.8V, with the safe limit being ~50% discharge.

Most 12V, 60Ah batteries therefore only safely store and nominally discharge 350 Wh @ 350W.

You can discharge that as fast as you want but the faster you discharge, the lower the capacity is (with 1000-1500W bringing you way down to like 65 Wh). Fridges have a surge when they start up to fire up the compressor. Starter batteries can take that, but once the refrigerant is cold, the fridge just maintains the temperature which uses a lot less energy - about 143W on average.

This reads just like an AI response

Regardless of source, if your refrigerator is running you better go catch it.

Its stealing your food.

Hey, ChatGPT, my uncle says new Macbooks are just glorified Raspberry Pis.

How many MB/s are in a Raspberry Pi?

Uh, watt?

Now I don't know enough about electronics to know how wrong this is, but I do know enough about electronics to know that this absolutely sounds wrong.

The problem comes when someone takes an answer like this, knowing far less than I do, and they try and hook up their fridge to a car battery.

And this is why I hate LLMs. Being confidently wrong is scary enough when it's just people, nevermind technology.

It does make me chuckle, though, that Skynet could have been totally innocent in their destruction of the human race, they just confidently came to the wrong conclusion and had the tools to carry it out.

Like a toddler whose inner thoughts are telling him to throw a cat out of the window. He doesn't know he's going to kill it, he just knows that's what his brain is telling him to do.

Jesus… the stupid, it hurts.

While reading the question I thought: "That's not how Watts work", but then this "answer" hit...

Licensed Insurance Agent

seems legit

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.

That answer is like the electronics version of the image with Patrick Stewart and the caption:

“Use the force, Harry

-Gandalf”

Licensed Insurance Agent

This post made me beat my head with a 2 by 4

May be a better fit in !mildlyinfuriating@lemmy.world or similar

I looked up the page and it gets worse.

You will need to shop for a car inverter. Find one that is at least 1,500 watts, and it will help you power your refrigerator for up to five hours—usually without damaging your car battery. Considering how much food we keep in our refrigerators, a $200 car inverter is a bargain!

For the uneducated, what's wrong with it?

My chickens say Shannon is full of shit.

Licenced insurance agent. Not for long!

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.

It hurts.