GregTech Solar Expansion

About

GregTech Solar Expansion expands the solar energy branch of GTCEu Modern with a structured multi-tier progression from LV to ZPM.

Solar Panels do not simply generate a fixed amount of energy. Their actual production depends on environmental conditions such as sky access, time of day, weather, biome, and dimension.

The built-in GUI makes the system transparent: you can see stored energy, current generation, panel integrity, actual EU/t and amperage delivered to the network, as well as a detailed breakdown of every factor affecting production.

The mod is designed to fit naturally into GregTech progression while providing extensive configuration options for both regular players and modpack creators.

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Features

• Solar Panels from LV to ZPM
• Solar Cells and Photoactive Layers with tier-based material progression
• Dynamic solar generation affected by:
  • Sky access
  • Time of day
  • Weather
  • Biome
  • Dimension
• Fully redesigned Solar Panel GUI
• Compact and Detailed display modes
• Progress bars for:
  • Stored Energy
  • Generation
  • Integrity
• Real network output display showing actual EU/t and amperage
• Configurable Base / Overdrive output modes
• Detailed generation tooltips showing individual multipliers and final output
• Color-coded multiplier feedback:
  • White = 100%
  • Green > 100%
  • Orange = 1–99%
  • Red <= 0%
• 4 module slots prepared for future upgrade mechanics
• Full English and Russian localization
• Integration with GTCEu harvesting rules

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Configuration

GregTech Solar Expansion includes a built-in configuration screen:

Mods -> GregTech Solar Expansion -> Config

You can configure:

• General solar generation conditions
• Individual settings for every Solar Panel tier from LV to ZPM
• Base and Overdrive output amperage for every tier
• Biome generation multipliers and overrides
• Generation multipliers for:
  • Overworld
  • Nether
  • End
• Custom dimension overrides
• Identifiers from other mods and datapacks

Configuration changes are applied without restarting the world.

In multiplayer, gameplay configuration is server-authoritative:

• Operators can edit gameplay settings
• Other players automatically receive the current server settings in read-only mode

This allows solar progression and balance to be adjusted for individual worlds and modpacks without modifying the mod itself.

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Requirements

• Minecraft 1.20.1
• Forge 47.4.0
• GTCEu Modern 7.4.x or 7.5.x

Tested and verified on:

Minecraft 1.20.1 + Forge 47.4.0 + GTCEu Modern 7.5.x

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Development Status

GregTech Solar Expansion is still in active development.

Planned future development includes:

• Functional upgrade modules
• Solar Panel degradation and Integrity mechanics
• Further recipe and balance adjustments
• Additional solar-related content

The current module slots, Integrity system, generation calculations, and configuration system provide the foundation for these mechanics.

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Full Changelog

0.2.3

Release note

• Version 0.2.2 was skipped; all changes prepared for it are included in 0.2.3.

Added

• Built-in mod configuration screen available through Mods -> GregTech Solar Expansion -> Config.
• Server-authoritative configuration editing and synchronization:
  • Operators can change gameplay settings in multiplayer.
  • Other players receive the current server settings in read-only mode.
• Editors for general generation conditions, per-tier panel settings from LV to ZPM, biome overrides, and dimension overrides, including identifiers from other mods and datapacks.
• Validation, Apply, Cancel, and Reset to Defaults controls for in-game configuration.
• Separate configurable Base and Overdrive output amperage for every panel tier.
• The selected output mode is stored independently for each Solar Panel and controls actual energy transfer.
• Configurable generation multipliers for the Overworld, Nether, End, and custom dimensions.

Changed

• Configuration changes now take effect without restarting the world.
• Generation caches are refreshed automatically when configuration changes.
• Stored energy is clamped when buffer capacity is reduced.
• Generation now safely combines sky, time, weather, biome, dimension, module, and integrity multipliers, including bonuses above 100%.
• Solar Panels now follow GTCEu harvesting rules and its requireGTToolsForBlocks setting:
  • Wrench only by default.
  • Wrench or Pickaxe when the setting is disabled.
• Updated textures for Solar Panels, Solar Cells, and Photoactive Layers.
• Updated the HV Photoactive Layer recipe:
  • Fine Naquadah Wire replaced with Fine Niobium-Titanium Wire.
  • Gallium Arsenide Plates replaced with Ultimet Plates.

Fixed

• Fixed generation bonuses above 100% being ignored.
• Fixed displayed combined percentages disagreeing with configured generation factors after integer EU/t rounding.
• Improved dimension status reporting when generation is disabled by a non-positive multiplier or blocked by the sky-access check.

Localization

• Added Russian and English text for the configuration screen, validation messages, Base/Overdrive modes, and dimension generation status.

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0.2.1

Fixed

• Solar Panel assembler recipes now correctly accept one of two soldering fluids through the #gt_solar:solar_soldering fluid tag:
  • gtceu:tin
  • gtceu:soldering_alloy
• Fixed mod version substitution in META-INF/mods.toml:
  • Switched from ${file.jarVersion} to ${mod_version}.
  • Added processResources expansion in build.gradle.

Added

• New fluid tag file: data/gt_solar/tags/fluids/solar_soldering.json.

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0.2.0

Overview

This update introduces a completely new Solar Panel GUI and significantly expands generation telemetry and environmental logic.

The system now clearly shows real network output, generation factors, and per-block current limits, forming the foundation for future module and degradation mechanics.

Added

• Completely redesigned Solar Panel GUI replacing the previous debug-style screen.
• Aligned and reusable progress bars:
  • Stored
  • Generation
  • Integrity, currently fixed at 100%
• Compact / Detailed view toggle.
• 4 module slots in preparation for future module mechanics.
• Output line showing actual EU/t and amperage delivered to the network.
• Per-block current limit toggle (1A / 2A), saved in NBT.
• Detailed generation breakdown tooltips for:
  • Sky access
  • Time of day
  • Weather
  • Biome
  • Dimension
  • Modules
  • Panel Integrity
• Color-coded multiplier indicators:
  • White = 100%
  • Green > 100%
  • Orange = 1-99%
  • Red <= 0%

Changed

• Generation logic expanded to account for weather, tier-based time of day, dimension, biome, and sky access.

Config / Balance

• Added tier-based time-of-day multipliers.
• Added biome-based generation multipliers with default rules and configurable overrides.

Localization

• Full Russian and English localization for GUI and tooltips.

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0.1.1

• Updated recipes for compatibility with newer GTCEu releases.
• Confirmed compatibility with GTCEu 7.4.1, 7.5.1, and 7.5.2.

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0.1.0

• Initial public-ready release.
• Added multiple Solar Panel tiers with custom textures.
• Added Photoactive Layers and Solar Cells.