- What to know
- Quick overview of the Photovoltaic Charger
- Where to find the Photovoltaic Charger in Subnautica 2
- How the Photovoltaic Charger works
- How to unlock and craft the module
- How to equip the Photovoltaic Charger
- Best strategies for using the Photovoltaic Charger
- Comparison against other Tadpole upgrades
- Why the upgrade is worth getting early
What to know
- The Photovoltaic Charger is a Tadpole vehicle upgrade module that recharges power during daylight in shallow water.
- You can find it near the Cicada Wreck (EVA Prep) after progressing past the Alien Base storyline.
- The module is crafted at the Modification Station after unlocking its blueprint.
- It works best alongside Engine Efficiency upgrades for maximum power conservation.
If you spend a lot of time exploring open-water biomes in Subnautica 2, the Photovoltaic Charger becomes one of the most useful quality-of-life upgrades for your Tadpole vehicle. Instead of constantly swapping Power Cells or returning to base docks, this module allows your Tadpole to slowly regenerate energy whenever sunlight is available.
The upgrade is especially valuable during mid-game exploration when your expeditions become longer and more dangerous.
Quick overview of the Photovoltaic Charger
| Feature | Details |
|---|---|
| Upgrade Type | Tadpole Module |
| Main Function | Recharges Tadpole power during daytime |
| Best Environment | Shallow sunlit waters |
| Unlock Method | Find and scan/acquire module blueprint |
| Crafting Station | Modification Station |
| Required Materials | 1 Copper Ingot, 1 Strong Acid, 1 Troilite |
| Story Progression Needed | Alien Base progression |
| Recommended Pairing | Engine Efficiency Module |
Where to find the Photovoltaic Charger in Subnautica 2
The Photovoltaic Charger is located near the Cicada Wreck (EVA Prep) area. This location becomes accessible after progressing through the Alien Base objectives in the main storyline. According to current Early Access progression, you will eventually receive a NOA Terminal ping connected to Iso’s blackbox recording, which marks the wreck location on your map.
| Area | Description |
|---|---|
| Main Region | Cicada Wreck (EVA Prep) |
| Nearby Landmark | Alien Base |
| Navigation Method | Follow NOA Terminal ping, and enter the interior room by using Repair Tool |
| Danger Level | Moderate |
| Recommended Equipment | Rebreather, Repair Tool, Spare Battery |
The wreck itself contains several exploration points and upgrade-related discoveries, so it is worth thoroughly searching the area instead of rushing directly to the module.
How the Photovoltaic Charger works
The module’s effect is simple but extremely practical.
While your Tadpole remains in shallow waters exposed to daylight, the vehicle slowly regenerates power automatically.
This means you can:
- Reduce Power Cell consumption
- Explore longer without docking
- Spend less time crafting replacement cells
- Maintain energy during surface travel
The recharge rate is not instant, so you should not expect infinite energy while constantly boosting at full speed. However, during slower travel or while parked near the surface, the passive charging becomes surprisingly efficient.
How to unlock and craft the module
Before crafting the upgrade, you first need to discover its blueprint at the Cicada Wreck.
Once unlocked, head to your Modification Station to build it.
Crafting recipe
| Material | Amount |
|---|---|
| Copper Ingot | 1 |
| Strong Acid | 1 |
| Troilite | 1 |
Modification Station requirements
| Material | Amount |
|---|---|
| Titanium | 2 |
| Celestine | 2 |
| Copper | 2 |
The Modification Station is required for several advanced Tadpole upgrades, so building it early is highly recommended.
How to equip the Photovoltaic Charger
Installing the module is straightforward. Build the Photovoltaic Charger at your Modification Station. Approach your Tadpole vehicle.
Open the upgrade interface near the top module slots beside the Power Cell compartment. Place the Photovoltaic Charger into an empty module slot.
Take the Tadpole into shallow daylight areas to begin passive charging.
Once installed, the module works automatically without additional maintenance.
Best strategies for using the Photovoltaic Charger
The upgrade performs best when combined with smart energy management.
Stay near the upper water layers
Because the module relies on sunlight, charging efficiency drops in deep or heavily shaded biomes. Staying closer to the surface during daytime travel gives the best results.
Combine it with Engine Efficiency
The strongest combination currently available is pairing the Photovoltaic Charger with the Engine Efficiency Module.
The Engine Efficiency upgrade reduces Tadpole energy consumption by 20% per module and can stack up to four times for major reductions.
Together, both upgrades create an extremely energy-efficient exploration setup.
Comparison against other Tadpole upgrades
| Upgrade | Main Benefit | Best Use Case |
|---|---|---|
| Photovoltaic Charger | Passive daytime recharge | Long-distance exploration |
| Engine Efficiency | Lower power usage | General travel |
| Depth Module Mk I | Increased crush depth | Deep biome access |
| Cavitation Muffler | Reduced noise | Avoiding aggressive creatures |
| Scout Ray Chassis | Better mobility | Fast maneuvering |
The Photovoltaic Charger is not the most powerful standalone upgrade, but it provides excellent long-term convenience.
Why the upgrade is worth getting early
The Photovoltaic Charger becomes more valuable the longer your exploration sessions become. During early survival, replacing Power Cells manually is manageable. Later in the game, however, efficient energy management becomes critical.
Because Subnautica 2 heavily revolves around power systems, every passive energy-saving upgrade dramatically improves survival efficiency.
For players who constantly travel between bases, wrecks, and biome objectives, the Photovoltaic Charger can save enormous amounts of resources over time.
