Theo manual thì Lexus R450h 12V outlet max 12V/10A (120V/100W), không đủ xức kéo cho IP.
http://www.lexomans.com/manguide-713.html
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Nếu không thì lụm cái 1500W Continuous/ 3000W Peak Pure Sine Wave Inverter, wired directly to cả battery (NOT the Hybrid battery)
https://www.amazon.com/1500W-Continuous-3000W-Inverter-Outlets/dp/B07ST4MQTL/?tag=vcf4ever09-20
"Instant Pot listed 1,000 watts; a 6-qt instant pot only really draws about 850 watts until it builds pressure. After that the power shuts off and only intermittently runs for maybe 30 seconds every few minutes after that."
https://www.amazon.com/ask/questions/Tx14EDBRWVN1ILJ?tag=vcf4ever09-20#:~:text=A%206%2Dqt%20instant%20pot,every%20few%20minutes%20after%20that.
Nhớ add inline fuse.
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I would not use power inverter. Too much strain on the car battery.
Easiest way is to cook the meat a head of time and then use one of these 12V hot lunchbox to keep the meat hot for long trip
https://www.amazon.com/Koolatron-LBS-01-Black-Lunch-Stove/dp/B0001MQ7A4/ref=sr_1_4?tag=vcf4ever09-20&dchild=1&keywords=12+volt+microwave+oven+for+truckers&qid=1598716973&sr=8-4
Make sure you have at least 20/30A fuse 12v outlet to use the hot lunchbox.
If exiting outlet wire gauge can handle, change out existing fuse to 20/30A fuse.
According to Lexus manual, there's an available 30A fuse not often used:
https://fuse-box.info/lexus/lexus-rx450h-al10-2010-2015-fuses
Fuse box: 44- TOWING - 30 A - Trailer lights