Planet Crafter Energy: Why Your Endgame Power Keeps Running Out (2026)

When your Planet Crafter energy runs dry in the endgame, you're not short on reactors. You're short on multipliers. A Nuclear Fusion generator delivers 1,485 kW, and a T2 Machine Optimizer with three Energy multiplier fuses pushes eight of them to several times that.

This guide runs the numbers on both approaches, settles the disputed fuse price and shows how to earn the Terra Tokens you need. In short: with fuses, experienced players power an entire world with about eight Nuclear Fusion generators. Without them you keep building and still end up in the red.

⚡ Planet Crafter Energy: Why the Grid Fails So Late

Early on, power isn't an issue. A few Wind turbines, later Solar Panels, and the display stays green. The break comes when you move to the big terraforming machines: higher-tier Heaters and Vegetubes, Tree Spreaders, the T3 Drill, Auto-Crafters. Consumption grows faster than you can add reactors.

The reflex is always the same: one more Nuclear Fusion generator, then another, until a whole floor is full of them. One player on the Steam forum describes "18 fusion generators per floor on 18 floors". It works, but it's the expensive solution. If your progress stalls even though you have enough power, the cause is somewhere else. See why terraforming gets stuck.

🔋 What Each Planet Crafter Energy Source Really Delivers

You need the rough numbers for the math further down. Guides and databases agree on these values:

• Wind turbine: about 1.2 kW. A pure starter option that stops mattering after the first terraforming milestone.
• T1 Nuclear Reactor: 86.5 kW. Your first serious power source, built from 1 Uranium Rod, 3 Super Alloy and 2 Water bottle.
• T2 Nuclear Reactor: 331.5 kW. A good bridge, built from 3 Uranium Rod, 1 Super Alloy, 3 Water bottle and 1 Explosive powder.
• Nuclear Fusion generator: 1,485 kW from 5 Pulsar Quartz and 4 Super Alloy. The strongest generator in the game, a little over four times a T2 Nuclear Reactor.

I'm leaving Solar Panels without a number on purpose, because their output depends on time of day and weather. When you build reactors, the bottleneck is materials, not space. More on that in the craft station and refinement guide.

🧮 Three More Reactors or One Optimizer? The Math

The Machine Optimizer changes everything for Planet Crafter energy in the endgame. It does nothing by itself. It holds fuses and passes their effect on to the machines within its radius.

• Machine optimizer: 60 m radius, 5 machines, 1 fuse slot, 50 kW own consumption. Recipe: 2 Explosive powder, 1 Uranium Rod, 2 Iron, 1 Cobalt.
• T2 Machine Optimizer: 75 m radius, 8 machines, 3 fuse slots, 150 kW own consumption. Recipe: 2 Explosive powder, 1 Uranium Rod, 3 Obsidian.

The game-data database planetcrafter.th.gl lists the Energy multiplier fuse at "+150%". In a Steam thread, however, one player measured only a 50 percent increase with a single fuse in a T2 Machine Optimizer, so a factor of 1.5. I use that more cautious value below. One important detail: the optimizer prioritizes fusion generators when several power sources stand in its radius.

Starting point for the comparison: eight Nuclear Fusion generators placed close together. I calculate conservatively and additively, so three fuses count as a factor of 2.5, not 1.5³.

That's the lever: almost four times the gain of three extra reactors, without adding a single cubic meter to your base. Even in the worst case, where the optimizer only covers one Nuclear Fusion generator, the gain after the 150 kW own consumption is about 2,077 kW. That's more than a whole extra reactor.

Whether multiple fuses stack additively or multiplicatively isn't officially documented anywhere. The often-quoted setup of "three T2 optimizers with nine fuses around a single fusion generator" produces "ridiculous output" according to the player who built it. That sounds like more than linear, but it isn't confirmed. Calculate additively and you won't be disappointed.

⚠️ 5,000 or 6,000 Terra Tokens? The Price of the Energy Multiplier Fuse

The sources contradict each other here, which is exactly why this gets its own section. Three independent sources put the Energy multiplier fuse at 6,000 Terra Tokens: a written-out price list of the trade rocket catalog, a guide article on the Portal generator and a player on the Steam forum who calls the fuses "expensive, 6000 tt".

The 5,000 figure that circulates belongs to a different fuse. The Production multiplier fuse costs 5,000 Terra Tokens, and the fuses for pressure, heat, plants and oxygen cost 2,500 each. The game-data database planetcrafter.th.gl lists them the same way: Energy multiplier fuse 6,000, Production multiplier fuse 5,000, heat, pressure, oxygen and plants 2,500 each. Prices can change with patches.

Two fuses are already spoken for by the Portal generator, which then gives you unlimited quartz of every type. Fuses also show up as loot in wrecks and blue crates, but unreliably, and according to the patch notes they drop less often in the endgame since v2.103. Where searching pays off is covered in the overview of the Planet Crafter worlds. All fuse types and recipes are in the Planet Crafter fuses guide.

📦 Where the Terra Tokens Come From

18,000 Terra Tokens sounds brutal, but with production running it's a matter of hours. Trade values per item according to planetcrafter.th.gl:

• Pulsar Quartz: 30 TT. By far the best bulk product once the Portal generator is running.
• Cookie: 10 TT. Made at the Cooking station from Flour and Chocolate.
• Super Alloy Rod: 15 TT · Uranium, Iridium and Osmium Rod: 10 TT each.
• Bacteria Sample: 10 TT. Only worth it in large numbers.

In concrete terms: 18,000 Terra Tokens equals 600 Pulsar Quartz or 1,800 Cookies. Run several trade rockets in parallel with different products. Players report over 1,000 TT per cycle. You unlock the blueprints you need as described in the blueprints and microchips guide.

A sensible build order for your Planet Crafter energy grid if you're starting from zero:

1. Wind and solar up to the T1 Nuclear Reactor, then stop expanding them.
2. T2 Nuclear Reactor as a bridge while Pulsar Quartz is still scarce.
3. Build Nuclear Fusion generators bundled in one place, not scattered across the map. Otherwise the optimizer radius won't reach them later. Good spots are in the best base locations guide.
4. Place a Machine optimizer as soon as it's available and put the first Energy multiplier fuse you find into it.
5. Build a token economy from Auto-Crafters and trade rockets.
6. Add a T2 Machine Optimizer and fill it with purchased Energy multiplier fuses.

Everything after that, from uranium and rockets to the last terraforming stages, is in the endgame guide. If you're just starting out, the beginner's guide with all terraformation stages is the better first stop.

💡 FAQ about Planet Crafter Energy

How many Nuclear Fusion generators do I need for a complete world?

With Energy multiplier fuses, community reports say about eight Nuclear Fusion generators are enough for a fully terraformed world. Without fuses you need several times that. The number matches the capacity of a T2 Machine Optimizer exactly.

Does an Energy multiplier fuse affect every machine in range?

It affects as many machines as the optimizer can hold: five for the Machine optimizer, eight for the T2 Machine Optimizer. If several power sources stand in range, fusion generators get priority. That's handy, because that's where the multiplier gains the most.

Should I tear down my old Nuclear Reactors?

Only if you need the space. The materials are too different for dismantling to pay off. It makes more sense to remove outdated terraforming machines with a poor ratio of consumption to effect.

Can I find Energy multiplier fuses instead of buying them?

Yes, as rare loot in wrecks and blue crates, mainly in procedural portal wrecks. Don't count on it, though. One player reports a single fuse after more than 400 GTi.

Why does my Planet Crafter energy drop at night?

Because Solar Panels fluctuate with the time of day. If your grid is only barely in the green, it tips over when darkness falls. Reactors deliver a constant output, so put everything critical behind them.

Checked against version 2.103 as of October 2026. Generator outputs and recipes (Nuclear Fusion generator 1,485 kW, T2 Nuclear Reactor 331.5 kW, T1 Nuclear Reactor 86.5 kW, Wind turbine 1.2 kW), recipes, fuse slots and own consumption of both Machine Optimizers, the effect listed for the Energy multiplier fuse and all trade values are from planetcrafter.th.gl. Rarer fuse drops in the endgame according to the v2.103 patch notes.

Community information: the optimizers' radius and machine count, the measured 50 percent effect per fuse, the priority for fusion generators, the eight generators per world and how multiple fuses stack. Values may change with patches.