The most effective way to solve the question of how to increase inventory space in Solarpunk is to craft a series of backpack upgrades at the Loom and Tinkerer's Bench. This direct path is supplemented by building dedicated base storage, unlocking specialized utility belts, and eventually commissioning a companion drone to carry your excess resources. Forget juggling stacks of Biopolymer and Scrap—permanent expansion is achievable through a clear progression.
This guide breaks down every single inventory and storage upgrade available in Solarpunk, from your first flimsy satchel to the near-limitless potential of late-game technology. We’ll cover the exact materials, crafting station requirements, and schematic locations to permanently solve your carrying capacity problems.
Crafting Bigger Backpacks: Your Main Priority
Your personal backpack is your lifeline while exploring the wilds beyond your homestead. Expanding its capacity should be your first and most consistent goal. There are four main tiers of backpacks, each offering a significant jump in slots and requiring progressively rarer materials and higher-tier crafting stations. Focus on unlocking the Weaver's Pack as soon as you establish your first workshop.
The Basic Satchel (10 Slots)
You begin the game with this. It’s a simple, 10-slot cloth bag that will feel cramped almost immediately. There is no crafting recipe for this item; it is your starting gear. Your first priority is to replace it.
The Weaver's Pack (20 Slots)
This is your first major upgrade and a huge quality-of-life improvement. It doubles your starting space. You'll need to build the Loom crafting station first, which requires components found in the starting Verdant Valley biome.
- Crafting Station: Loom
- Materials: 30x Fiber Weave, 15x Cured Leather, 5x Bronze Rivets
- Effect: Expands personal inventory to 20 slots.
The Geode-Stitched Rucksack (30 Slots)
This mid-game backpack requires venturing into the Sunken Caverns to find Geodes. The bag itself is reinforced to handle heavier materials, reflected in its recipe. This upgrade demands the Tinkerer's Bench, a Tier 2 crafting station.
- Crafting Station: Tinkerer's Bench
- Materials: 25x Hardened Weave, 10x Polished Geodes, 5x Steel Buckles
- Effect: Expands personal inventory to 30 slots.
The Exo-Frame Hauler (45 Slots)
This is the ultimate end-game backpack, adding a powered exoskeleton frame to massively boost your carrying capacity. The components are rare and found in dangerous, late-game areas like the Glass Desert and the high-altitude Tempest Towers. Crafting it is a major milestone, effectively eliminating inventory management as a constant concern. The Stabilized Power Cell schematic is a rare drop from Automated Sentinels in the desert.
- Crafting Station: Advanced Tinkerer's Bench
- Materials: 20x Titanium Weave, 5x Glass Desert Lenses, 2x Logic Cores, 1x Stabilized Power Cell
- Effect: Expands personal inventory to 45 slots.
Solarpunk™ in-game screenshot
Beyond the Bag: Unlocking Utility Belts
While backpacks expand your general inventory, utility belts add specialized, dedicated slots that don't compete with your main space. These are crafted at the Tinkerer's Bench after you find their schematics out in the world. They are essential for organizing your gear and freeing up precious backpack slots from being clogged by tools and seeds.
The Gatherer's Bandolier
This belt adds 8 dedicated slots exclusively for seeds, spores, and other propagation materials. It means you can carry a wide variety of plantable items for your bio-domes without sacrificing space for wood or stone. The schematic is often found in a chest within the Sunken Greenhouse, a large ruin in the eastern part of the Verdant Valley.
The Tinkerer's Toolbelt
An absolute game-changer, the Tinkerer's Toolbelt adds 6 dedicated slots that automatically hold your primary tools (Axe, Pickaxe, Shovel, Wrench, etc.). When you select a tool from your radial menu, you use it directly from the belt, meaning they never need to sit in your main backpack again. The schematic for this is a guaranteed reward for completing the quest "A Noisy Neighbor" from Jian, the settlement's resident engineer.
Building Your Hoard: Base Storage Solutions
Your personal inventory is for exploration; your base is for hoarding. Establishing a robust and organized storage system at your homestead is just as important as upgrading your personal pack. As you advance through the tech tree, you'll move from simple wooden boxes to a fully automated, centralized network.
Early Game: Wooden Crates & Wardrobes
Your first storage options are simple and cheap. The basic Wooden Crate holds 15 stacks of items, and the Wardrobe holds 10 stacks but is designed for clothing and gear. You can build dozens of these, but it quickly becomes chaotic. They are crafted directly from your build menu with basic wood and fiber.
Mid-Game: The Automated Sorter Hub
The Sorter Hub is the heart of an efficient base. It's a central block with one input chute and multiple color-coded output ports. You can connect up to 8 other containers (like crates or silos) to it. After configuring its filters via the Logic Core interface, you can dump your entire inventory into the input chute, and the Hub will automatically route every item to its designated container. Building this should be a top priority once you unlock the necessary electronics from the Tinkerer's Bench.
Solarpunk™ in-game screenshot
End-Game: Resource Silos & The Centralized Grid
Silos are massive, single-resource storage units. You can build a Stone Silo, a Wood Silo, a Water Cistern, and so on. Each can hold thousands of a single resource. When connected to your Automated Sorter Hub, they provide a seamless way to offload bulk materials. Late-game upgrades allow you to link your entire storage grid to a central terminal, letting you access any item from any crafting station in your base without having to physically move it.
Getting Help: Companion & Vehicle Storage
You don't have to carry everything yourself. The world of Solarpunk provides options for getting a helping hand—or rotor.
The Scuttler Drone
Once you build the Drone Bay, you can construct a Scuttler companion drone. In its basic form, it follows you and provides 12 slots of additional mobile storage. It can be upgraded three times at the Drone Bay:
- Cargo Expansion I: Increases Scuttler inventory to 18 slots. (Requires Steel and Copper Wire)
- Cargo Expansion II: Increases Scuttler inventory to 24 slots. (Requires Aluminum and a Basic Logic Core)
- Resource Fetch Module: Allows you to send the Scuttler back to base to automatically deposit its inventory into the Sorter Hub, after which it will return to you.
The Sun-Treader Vehicle
While primarily a mode of transport, the craftable Sun-Treader hover vehicle also comes equipped with a small cargo hold. This trunk provides 20 dedicated inventory slots that can be accessed when you are near the vehicle. It's perfect for setting up a mobile base of operations on long expeditions, allowing you to ferry large hauls of materials back to your homestead without making multiple trips on foot.
Solarpunk™ in-game screenshot
The Ultimate Upgrade: The Librarian's Pocket Dimension
There is one final, secret inventory upgrade that is entirely missable. It is a unique reward tied to the mysterious, data-hoarding character known as The Librarian, who resides in the derelict Grand Archives. By completing their long and cryptic quest line, which involves using the Anomaly Scanner to locate data fragments and solving the complex Star-Chart Puzzle in the observatory, you are gifted a strange device: the Pocket Dimension.
This item, when activated, provides an additional 25 slots of inventory space that are accessible from anywhere, at any time. It functions like a separate, ethereal backpack. This is the single largest one-time inventory increase in the game and is considered the ultimate prize for dedicated explorers.
Frequently Asked Questions about Inventory
Here are quick answers to some of the most common questions about managing your items in Solarpunk.
Can you increase item stack sizes? Yes. While most resources stack to 50 by default, you can increase this. In the "Efficiency" branch of the tech tree, the "Advanced Logistics" skill increases the stack size for all raw materials (wood, stone, ore, etc.) to 99. A further skill, "Material Compression," increases it to 250.
What's the absolute maximum inventory space a player can have? The absolute maximum mobile inventory you can have on your person is 94 slots. This is achieved by equipping the Exo-Frame Hauler (45 slots), the Tinkerer's Toolbelt (6 slots), the Gatherer's Bandolier (8 slots), and having unlocked the Librarian's Pocket Dimension (25 slots). If you include a fully upgraded Scuttler drone following you, your total mobile capacity reaches 118 slots.
Is there a way to quickly get rid of junk items? Yes. Early in the game, you can simply drop items on the ground, but they will despawn. The proper way is to build the Decomposer unit. It breaks down any item or piece of equipment into a small percentage of its base raw materials, which is far more efficient than just trashing them.
Your Path to a Bottomless Bag
Managing your inventory in Solarpunk is a journey, not a destination. Your progression from a tiny satchel to a vast, automated network with drone assistants is a core part of the game's loop. Prioritize crafting the backpack tiers first, as they provide the most immediate and universal benefit. From there, augment your capacity with specialized belts and a well-organized base storage system using Sorter Hubs.
By following this path, you'll spend less time agonizing over what to leave behind and more time gathering, building, and shaping the world.