Fusion Reactor

The Fusion Reactor converts Deuterium into Fuel Cells. In the current live s2 rules, it does not power your normal energy grid.

That makes it a logistics and mission-boost building, not a replacement for Solar Plants or Solar Satellites.

Quick Stats

Property	Value
Produces	Fuel Cells
Consumes	Deuterium
Powers live Energy grid	No
Prerequisites	Deuterium Synthesizer 5, Fusion 1

How It Works

The Fusion Reactor creates Fuel Cells from its effective reactor output.

The building first calculates reactor output:

fusion_output
  = 22 × level × 1.04^level × production_slider
    × (1 + 0.05 × Energy Technology)
    × (1 + 0.10 × Fusion)
    × (1 + 0.05 × Fusion)

Then Fuel Cells are charged from that output:

fuel_cells_per_hour = fusion_output / 80

Important Player Rule

Fusion Reactor output is stored as Fuel Cells instead of feeding your normal Energy bar.

If your mines need live Energy, you still need:

Deuterium Consumption

The reactor also burns Deuterium while it runs:

deuterium_per_hour
  = 16 × level × 1.12^level × production_slider

So both output and fuel consumption scale with the reactor's production slider.

If your Deuterium economy is weak, a high reactor slider can hurt more than it helps.

Fuel Cell Storage Bonus

Fusion Reactor levels also increase Fuel Cell storage.

The storage bonus is:

fusion_storage_bonus
  = floor(metal_storage_capacity_at_same_level / 10)

That bonus stacks on top of the normal Fuel Cell storage base:

base_fuel_cell_storage = max(5,000, energy_max × 12)

This is why Fusion Reactor investment improves both:

Fuel Cell generation
Fuel Cell storage capacity

Example Output

At 100% slider, Energy Technology 0, and Fusion 1:

Level	Fuel Cells/Hour	Deuterium/Hour
1	0.33	17.92
5	1.93	140.99
10	4.70	496.94
15	8.58	1,313.66
20	13.92	3,086.81

Higher Energy Technology and Fusion research push the Fuel Cell side higher.

When Fusion Reactor Is Worth It

Fusion Reactor is strongest when:

you actively use Fuel Cell mission boosts
you depend on Sensor Phalanx or Jump Gate usage
you trade Fuel Cells or move them between worlds
your Deuterium income is healthy enough to feed the reactor

It is weaker when:

your Deuterium income is tight
you actually need live Energy for mine output
you are trying to solve a mine power shortage

Strategy Tips

Treat Fusion Reactor as a Fuel Cell economy building, not a mine-energy building.
Only run high sliders if your Deuterium production can support them.
Pair Fusion Reactor with Fuel Cell Technology, otherwise the world will not store the output as Fuel Cells.
High-level Fusion Reactors are especially valuable on worlds that support moon utility or deep-space mission play.