Original Resin serves as the energy resource in Genshin Impact. Original Resin is used to claim challenge rewards from Ley Line Blossoms, Petrified Trees (Domains), and Trounce Blossoms (Bosses), as well as Event-exclusive challenges.
Additionally, any use of Original Resin (excluding the conversion into Condensed Resin) will award Adventure EXP at a ratio of 1:5, e.g. spending 20 Resin will result in 100 AEP.
40 Original Resin is required to craft 1x Condensed Resin (only up to 5 are able to be held at a time).
There are a few ways to replenish resin:
Original Resin passively regenerates at a rate of 1 unit every 8 minutes, if it is not fully capped (160 total):
As long as the Original Resin is regenerating, you will go through 180 resin per 24 hours, 1260 resin per week. Thus it is advised to spend Resin whenever possible to not stay at the cap, as not to waste "potential" Resin.
Full replenishment (from 0 to 160) will take 21 hours and 20 minutes.
Click on the Resin icon on the top of the map screen to view your current refill timers (time to next unit/full refill).
The timer will start once the amount drops below the cap.
Players can manually instantly replenish 60 Original Resin at a time: