I just went to my bank of notes I've been collecting. Some of these websites might be helpful to you as well.
1. Starting with if you want to totally nerd-out. This post goes through everything you need to determine your battery requirements based on your specific setup and expected uses. Beware: you must be comfortable with spreadsheets, but he's got tons of examples. https://www.explorist.life/what-size...ower-a-camper/
[lots of great articles on his website for DIY solar stuff, but this power audit is helpful to determine what you need even if you are paying ETI or a solar consultant to finish the work]
2. Go Power has a list of general, non-specific estimates for different products (YMMV) https://gpelectric.com/all-about-inverters/
[focus is on 120v stuff, so you'll still need to add in the other DC appliances to work out battery capacity needs]
3. Helpful video on how much an Instant Pot uses for various cooking tasks. This reminds me that the total 120v amp draw is important in sizing inverters but to think in terms of amp-minutes (not amp-hours) when working out battery needs.