TLDR - If you want units, stasis devices are the best to make BUT it’s not by a lot. You make slightly less with fusion igniters but they require less mouse clicks. My personal preference is fusion igniters because you don’t have to click as much. This guide only applies to relaxed and normal mode.
Keep in mind that both stasis devices and fusion igniters cannot be made if you are a new player or starting a new playthrough, this guide is for more established players. The stasis device and the fusion igniter are the two top items you can craft and sell for units. I have both a stasis device farm and a fusion igniter farm. I’ve included a picture of what both my farms look like from the air, the farm only has 1 floor so it is a very minimal farm. You can increase how much units you make simply by adding more floors or adding more biodomes. The farm also has all 10 storage containers. There are 12 biodomes. 11 biodomes have only 1 entrance so they grow 13 plants. 1 biodome has 2 entrances so it only grows 10 plants. This is a total of 153 plants that you can grow.
The production of 5 stasis devices requires 145 plant spots, which leaves 8 plant spots for growing sac venom.
10 faecium
40 gamma root
30 frost crystal
20 solanium
5 cactus flesh
40 star bulb
8 sac venom
Sac venom is the most profitable thing to grow between nipnip, albumen pearls, and gravitino balls.
The production of 5 fusion igniters requires 150 plant spots, which leaves 3 plant spots for sac venom.
5 mordite
60 fungal mould
10 frost crystal
20 solanium
15 cactus flesh
40 star bulb
3 sac venom
So you do make more units with stasis devices, but stasis devices require glass and glass is what contributes the most mouse clicking. In fact, you’ll have to make a total of 25 glass and that’s actually a lot. A single stasis device and a single fusion igniter both sell for about 15,000,000 units, so when you make 5 and sell them you get roughly 75,000,000 units. There’s no SIGNIFICANT difference between the two. Making 1 fusion igniter requires 30 plant spots. Making 1 stasis device requires 29 plant spots, so for the 30th plant spot you can grow 1 sac venom. It’s this one extra plant spot that makes stasis devices slightly more profitable.
Making these items also requires gases and metals. You have to build many resource farms, this is the reason new players can’t do this right away. My recommendation is to build a “minimal” resource farm for the following gases:
1 - Nitrogen
2 - Sulphurine
3 - Radon
4 - Oxygen (you do not need actual oxygen, you will refine the oxygen into carbon and then a 2nd refining step into condensed carbon)
These 4 gases are required for both stasis devices and fusion igniters.
For stasis devices, you need resource farms for the following:
1 - Dioxite
2 - Phosphorus
3 - Parafinium
4 - Cobalt (refine into ionized cobalt)
For fusion igniters, you need the following resource farms:
1 - Pyrite
2 - Uranium
3 - Ammonia
4 - Cobalt (refine into ionized cobalt)
5 - Magnetized Ferrite (refine into pure ferrite)
Here is my setup for a “minimal” resource farm:
4 metal extractors or 4 gas extractors on resource hotspot
8 supply depots next to extractors
2 large refiners next to supply depots
6 electromagnetic generators on electromagnetic hotspot
1 base computer halfway between extractors and electromagnetic generators
1 base teleporter next to extractors
This setup will get you an amount of 9000 of the particular resource, whether it be a gas or a metal. If you like a particular resource hotspot for the view and there is no nearby electromagnetic hotspot, you can individually power each extractor by connecting 2 batteries and 3 solar panels to each extractor. So if you have 4 extractors you need 8 batteries and 12 solar panels. Electrically connect these components in series - extractor then battery then battery then solar panel then solar panel then solar panel. This is enough to enable the extractor to run continuously day and night. A base teleporter can run continuously with 1 battery and 1 solar panel. In all honesty, you want resource farms for everything just to make your No Man’s Sky life easier in general. Electromagnetic generators, mineral extractors, and gas extractors all require chromatic metal to make; so you may as well make a copper resource farm so you can refine the copper into chromatic metal. It’s a lot of work to set all this up, but once everything is setup you’re on easy street.
Conclusion: If you want slightly more units make stasis devices, if you want less mouse clicks make fusion igniters.