Solar Flux Keep Upgrades
by Christofmeg
Solar Flux Keep Upgrades changes how Solar Flux crafting treats solar panels, so upgrades installed in a panel are kept instead of being lost.
What it does
Without this mod, crafting a solar panel that holds upgrades can wipe out the energy and upgrades inside it. The mod replaces the default Solar Flux crafting recipes with a serializer based on the vanilla shaped and shapeless crafting types. Upgrades are pulled out of an installed panel and returned to the player rather than deleted, and the mod also adds a fusion crafting serializer that stops a panel holding upgrades from being fused.
Upgrades that exceed the size of a 2x2 inventory crafting grid can still be extracted, although the extraction has to be repeated several times. Draconic Evolution is optional; when it is installed, its solar panels are added automatically. Modpack creators can add custom solar panels and point their recipes at the same serializers. The mod runs on Forge and NeoForge for 1.20.1 and 1.21.1, and is open source under the MIT License.
Key features
Keeps installed upgrades
Upgrades inside a solar panel are extracted and returned to the player when the panel is used in a craft.
Replaces default recipes
The default Solar Flux panel recipes are swapped for versions that use the keep-upgrades serializer.
Fusion crafting guard
A separate fusion serializer blocks fusion crafting for any solar panel that still contains upgrades.
Custom panel support
Custom solar panels can be given the same shaped and shapeless serializers so their recipes keep upgrades too.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Optional 3
Use cases
Who it’s for: Players who use Solar Flux Reborn with upgraded solar panels, and modpack creators who need the Solar Flux panel recipes to keep installed upgrades.
How it compares
The FE Grid is open source under the GNU General Public License v3.0 only and is published for 1.20.1 on Forge and NeoForge. Solar Industrialization is NeoForge only for 1.21.1 and is not open source, licensed as All rights reserved.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Solar Flux Keep Upgrades | Forge and NeoForge | 1.20 – 1.21.1 | Client and server | 2026-05-28 |
| The FE Grid | Forge and NeoForge | 1.20.1 | Client and server | 2025-07-11 |
| Solar Industrialization | NeoForge | 1.21.1 | Client and server | 2026-09-12 |
Questions
Does Solar Flux Keep Upgrades need Solar Flux Reborn?
Does the server need Solar Flux Keep Upgrades?
Which Minecraft versions are supported?
Do Draconic Evolution panels get the fix?
In the catalog
Solar Flux Keep Upgrades is one of 8,499 Technology mods on ModsFinder, and one of 4,122 Technology mods for Forge. 32,366 mods support Minecraft 1.21.1.
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What the author says
This mod modifies the crafting behavior of Solar Flux: Reborn solar panels. The default recipe serializer that empties a solar panel of energy has been replaced with a recipe serializer solarfluxkeepupgrades:crafting_shapeless. The serializer is identical to minecraft:crafting_shapeless, but it extracts all upgrades…
Official listing
- Modrinth page
- modrinth.com/mod/solarfluxkeepupgrades
- Owner
- Christofmeg
- Published
- 2026-01-31
- Updated on Modrinth
- 2026-05-28
- Facts verified
- 2026-10-15