So I gather about half of these posts ignored the OP's question about crock pots/slow cookers and morphed into the benefits of the instanpot.
Oh, apparently the two aren't the same: "In the simplest terms, a Crock-Pot is a type of slow cooker; however, not every slow cooker is a Crock-Pot. ... It has a stoneware pot that is surrounded by a heating element, whereas a slow cooker is typically a metal pot that sits on top of a heated surface." Reference is
https://www.tastingtable.com/cook/national/slow-cooker-crock-pot-difference
One commenter to this thread didn't give the size of their IP but said they needed a Jackery 1000 to run it! That's uhh, pricey...
I'd think the instantpot mini 3 qt wouldn't need that much but if it does then you possibly are better off with a slow cooker.
When I searched for one example to check the wattage draw, I found they vary from 120 watts for the smaller 1.5 qt models to 300 watts for the 8 qt model. The 1.5 qt one one that had a bazillion reviews for $14 is listed here:
Elite Gourmet Lid & Ceramic Slow Cooker with Adjustable Temp, Entrees, Sauces, Stews & Dips, Dishwasher Safe Glass Lid & Crock Pot,
1.5 Quart, Stainless Steel
4.7 out of 5 stars 8,875 ratings (that's a lot even if some are fake)
A recent review which touches on the temp settings said this:
"Reviewed in the United States on August 12, 2020
Size: 1.5 Quar tVerified Purchase
I have used this several times after purchasing here on Amazon. Great little micro slow cooker! I have made meatballs, petite filet steaks, and some rice. All turned out excellent. The "low" setting is perfect for traditional (expected) slow cooking times. The "high" setting is really, really strong (be careful!). The "warm" setting is perfect. That is something I wish my bigger Crock pot had. The warm setting keeps it JuSt RiGhT!
Clean up is a breeze, glass lid is solid, cord is kinda short. Perfect size for single, old, fat, retired turds like me who are lazy."
Seems to me other than the quickness, this is a better way to go as far as energy consumption.