Option to prefer free chargers

🚧 THIS IS A TICKET MIGRATED FROM UPVOTY. The original ticket and comments will be available for a limited time over at:
https://abrp.upvoty.com/b/request-a-feature/option-to-prefer-free-chargers/
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I don't see any option when setting preferred chargers in your profile, to put Free chargers (with a minimum charge speed, 24/50kw). It would be nice on a long trip to know where all the free DC chargers are to save $$$ and ABRP takes those into account in it's route suggestion.