One of the biggest early-game challenges in Subnautica 2 is keeping your base powered after sunset. Solar Panels stop generating energy at night, which can shut down oxygen production, lights, and Fabricators. The solution is Power Storage (also called Power Capacitor), a module that stores excess daytime power for use at night.
This guide explains how to unlock it, where to find the fragments, the crafting recipe, and tips for a reliable power setup.
Why You Need Power Storage
- Solar Panels are the earliest power source but produce little to no energy at night or in deep water.
- Power Storage lets you bank surplus energy during the day so your base stays fully operational 24/7.
- It’s essential before you unlock Hydroelectric Turbines or Bioreactors.
How to Unlock Power Storage
Power Storage is unlocked by scanning Power Capacitor fragments (base pieces).
Main Fragment Locations:
- One fragment is commonly found near the Rebreather Mask blueprint location.
- Another is located at a Blackbox / PDA site tied to the “Investigate Tadpole Pens” quest.
- Check abandoned habitats, science outposts, and wrecks in the starting and mid-shallows areas.
Pro Tip: Use your Scanner Station (once built) and pin “Power Capacitor” or “Base Power Storage” to highlight nearby fragments. Explore systematically around the Welcome Center and northern Old Habitat areas.
How to Craft Power Storage
Once you have the blueprint, craft the Power Storage module at your base Builder / Fabricator under the Power category.
Crafting Recipe:
- 1x Germanium Ingot
- 3x Titanium
- 2x Salt
Material Sources:
- Titanium — Extremely common; break nodes and ship debris everywhere.
- Salt — Large deposits southeast of the Lifepod (past the Welcome Center).
- Germanium Ingot — Processed at the Processor (scan it in the Old Habitat north of the Lifepod). Requires raw Germanium or related minerals.
Place the Power Storage unit directly on your habitat exterior or inside a powered room. It automatically charges from connected generators (like multiple Solar Panels) and discharges when needed.
Best Early Power Strategy
- Build Multiple Solar Panels — Place 4–6+ on the roof of your base for strong daytime generation.
- Add Power Storage — At least one unit to store excess power.
- Upgrade When Possible:
- Hydroelectric Turbines — Best long-term option. Place in strong underwater currents (no daytime/night cycle issues).
- Bioreactor — Good backup using organic materials.
- Power Transmitters — Extend power from distant generators to your base.
Power Management Tips:
- Avoid running heavy machines (Processor, Scanner Station, Fabricator) at night until you have solid storage.
- Monitor your base power display — blue usually means excess/generating, red means consumption.
- Expand storage as your base grows (add more Power Storage units).
Pro Tips for Reliable Power
- Build your starter base in a shallow area with good sunlight for Solar Panels.
- Position your base near a strong current if you plan to transition to Hydroelectric Turbines quickly.
- Power Storage + several Solar Panels is usually enough for a small-to-medium base in the early-to-mid game.
- Crafting pulls resources automatically from base lockers — keep Titanium and Salt stocked.
Quick Power Storage Checklist
- Scan Power Capacitor fragments
- Build Processor (for Germanium Ingots)
- Gather Titanium, Salt, and Germanium
- Craft and attach Power Storage to your habitat
- Place multiple Solar Panels on the roof
With Power Storage unlocked, you can stop worrying about nighttime blackouts and focus on exploration, the Tadpole, and deeper story progression.
