It’s not real consent if you’re forced to agree to use the product or if the terms allow the company to alter the terms.

You can get “smart” devices that do not sell your data, but they are less common and they can be hard to find when shopping. You may not get a choice about “smart” meters, but you may be able to obfuscate your electrical usage with batteries. However, if the batteries have an internet connection they’ll probably sell your data.