On the hydrogen side in the gui, there is a dump button/setting, that'll let you run it only outputting oxygen. Answer from Fat-Knacker on reddit.com
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Reddit
reddit.com › r/feedthebeast › mekanism electrolytic separator "dumping excess" help
r/feedthebeast on Reddit: Mekanism Electrolytic Separator "Dumping Excess" help
May 2, 2021 - By the time you are quadrupling you should have more that sufficient generation to support 2 fully upgraded ESs so one can be dedicated to oxygen and one to hydrogen and dumping the other. ... If one ES can do the job with slightly smarter internal logic, then I feel like that's how the machine should be designed. ... Vanilla Redstone Comparators work just fine to measure the contents of Mekanism Tanks, and is also perfectly capable of making the NOT and OR gate(s) necessary for either external tank to turn on the Electrolytic Separator, and then have it off when both are full.
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Reddit
reddit.com › r/mekanism › hydrogen and cursed electrolytic separator
r/Mekanism on Reddit: Hydrogen and cursed electrolytic Separator
January 19, 2024 -

As we everybody knows mekanism remove recipe for making hydrogen from water in electolytic separator it doesnt take water anymore only heavy water and it make deuterium and oxygen so i can make oxygen okay but i rly dont know how to make hydrogen also why they remove this recipe ? im rly tilted becouse i like this mod for a looong time and this is sad and also making me angry can you somebody tell me how to get hydrogen by a different way or what to do becouse without hydrogen i cant make so much things . Im playing minecraft modded server 1.20.1 mekanism version is 10.4.5.

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Reddit
reddit.com › r/allthemods › electrolytic separator output sides.
r/allthemods on Reddit: Electrolytic separator output sides.
November 24, 2016 - On the left side, I placed a Gas ... burn the hydrogen. Either the Electrolytic Separator (ES) is auto-ejecting into the GG, or else the GG is 'pulling' from the ES. I believe Mek has some quirks/bugs as related to gases and certain machines.
Find elsewhere
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Reddit
reddit.com › r/feedthebeast › electrolytic separator consuming ridiculous amounts of power. is this normal?
r/feedthebeast on Reddit: Electrolytic separator consuming ridiculous amounts of power. Is this normal?
May 1, 2022 - It's true specifically for electrolytic separators to prevent you getting way more energy out of burning hydrogen than it takes to separate it from water. ... I edited my original comment to include the exact page and info from the Mekanism wiki.
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Reddit
reddit.com › r/allthemods › is there any way?
r/allthemods on Reddit: Is there any way?
September 12, 2025 -

I am using Applied Energistics 2 (AE2) to organize everything and every possible recipe from all the mods. While exploring Mekanism, everything worked well until I encountered the Electrolytic Separator, which has two outputs. The issue is that I can't configure it to eject both outputs into the same Pattern Provider.

I want to automate the production of both hydrogen and oxygen, but I don’t want to set up a passive generation system since I plan to use the same machine for other chemicals as well. Is there a way to automate this process, or should I consider using multiple separators?

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Mekanism Wiki
wiki.aidancbrady.com › wiki › Electrolytic_Separator
Electrolytic Separator - Official Mekanism Wiki
Typically the first application of the Electrolytic Separator is in the electrolyzing of water into Hydrogen and Oxygen.
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Reddit
reddit.com › r/allthemods › electrolytic separator power consumption
r/allthemods on Reddit: Electrolytic Separator power consumption
May 5, 2021 -

I am having huge power problems while using just 5 electrolytic separators. I am currently using a mix of solar panels from Powah! (Niotic x2 and blazing x2) and solar flux reborn (2x Tier 5) but these still don't seem to be enough and immediately drain 10million RF out of my ender cell the second I turn them on. Is this an issue with the mod or is that how it's supposed to be? Any solutions to power would be great!

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Reddit
reddit.com › r/moddedminecraft › [mekanism] electrolytic separator infinitely draining a lot of energy
r/ModdedMinecraft on Reddit: [Mekanism] Electrolytic Separator Infinitely Draining A LOT of Energy
January 5, 2021 -

For some reason it seems like the Electrolytic Separators from Mekanism are infinitely draining energy even though what they're connected to doesn't further require any of the resource they're generating. The only time it doesn't is if I set both resources to "Idle" - but if I do this, I will run out of one or the other resource at some point, can I can't have that for the ore multiplying setup.

Anyone else run into this?

(My temporary solution has just been putting both Electrolytic Separators to react to redstone signal and using a switch to turn them off when I'm not using them :|)

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Reddit
reddit.com › r/feedthebeast › help with mekanism!
r/feedthebeast on Reddit: Help with Mekanism!
September 29, 2016 - A final gotcha - you are making both hydrogen and oxygen, you need to make sure that you are either using the hydrogen elsewhere or dumping excess in the separator otherwise it will stop making oxygen.