Clean Energy Charging
- New setting that can try to reduce your carbon footprint by selectively charging when lower carbon emission electricity is available
Does anyone know how exactly does this feature work? Do you have it turned on or off?
"What Is Clean Energy Charging on iOS 16?
Clean energy charging on iOS 16 is a feature that Apple implemented in iOS 16.1 that optimizes your charging times so that you draw more power when the energy grid uses renewable sources of energy. Most energy grids run on a majority of either oil or natural gas mixed in with nuclear and a combination of renewables, but a country can change its primary source of energy accordingly. Depending on the time and conditions, a country may use more renewables if it’s cost effective. Unfortunately for now, the clean energy charging feature is only available in the US as it utilizes information from the US Department of Energy and local authorities."
Can You Use Clean Energy Charging on iOS 16?
Find out if you can use the clean energy charging iOS 16 feature to help reduce overall carbon emissions with renewable power.

I have it on since it was available and have not noticed any difference with charging. I guess that's the point. Also have optimized charging on as well.