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Rust Electricity Calculator
SAM Site: 25 power; Tesla Coil: 25 power; Auto Turret: 10 power; Search Light: 10 power. Add the components you want to run to total their draw and see what powers them - and how long a battery keeps them on.
Components
| Component | Power | How many |
|---|---|---|
| 25 | ||
 |
25 | |
| 10 | ||
| 10 | ||
| 10 | ||
| 3 | ||
| 3 | ||
 |
5 | |
| 2 | ||
| 5 | ||
| 5 | ||
 |
5 | |
| 5 | ||
| 8 | ||
| 1 | ||
 |
1 | |
| 1 | ||
| 3 | ||
| 3 | ||
| 2 | ||
| 2 | ||
| 5 | ||
| 5 | ||
| 4 | ||
| 5 | ||
| 5 | ||
| 5 | ||
| 1 | ||
| 1 | ||
| 1 | ||
| 1 | ||
| 1 | ||
| 1 | ||
| 1 | ||
| 1 | ||
| 1 | ||
| 2 | ||
| 4 | ||
| 5 | ||
| 6 | ||
| 7 | ||
| 1 | ||
| 1 | ||
| 1 | ||
| 1 | ||
| 1 | ||
| 1 | ||
| 1 | ||
| 1 | ||
| 1 | ||
| 1 | ||
| 1 | ||
| 1 | ||
| 1 | ||
| 5 | ||
 |
0 | |
 |
0 | |
 |
0 | |
 |
0 | |
 |
0 | |
 |
0 | |
 |
0 | |
 |
0 | |
 |
0 | |
 |
0 | |
 |
0 | |
 |
0 | |
 |
0 | |
 |
0 | |
 |
0 |
Total draw
Power it with
Battery runtime
Power sources and batteries
| Source | Output | Notes |
|---|---|---|
 Large Solar Panel | up to 20 | Peak when facing the sun; less at an angle, nothing at night, and less when damaged. |
 Wind Turbine | 0 - 150 | Random wind; more the higher it stands above the ground or rock below it; buildings nearby block it. |
 Small Generator | 40 | Burns roughly 250 low grade fuel an hour (community-measured), whatever the load. |
 Water Wheel | varies | Added April 2026 - steady in rivers, tidal in the ocean; you can also run inside it. |
 Small Rechargeable Battery | 15 out | Stores 400 rWm - Buffed in Oct 2023 - older guides say 150 / 10. |
 Medium Rechargeable Battery | 50 out | Stores 9,000 rWm |
 Large Rechargeable Battery | 100 out | Stores 24,000 rWm |
How Rust power works
- Each device needs its full power to work (a ceiling light needs 2, an igniter 2); anything left over passes through its Passthrough output.
- Logic parts - switches, gates, timers, blockers, splitters, branches, combiners - have used no power since April 2024. Sensors and radio parts still use 1.
- A splitter divides its input between the outputs you actually connect; power a load doesn't use is lost, not passed on.
- An electrical branch sends the amount you set out of Branch Out and the rest out of Power Out.
- A root combiner adds two power sources together (generators, panels, batteries).
- Batteries charge at up to about 80% efficiency and give out at most their max output; they can charge and discharge at the same time.
- Wires reach about 30 m with up to 16 anchor points; route through another component to go further.
- Since August 2026 the Power Plant's heavy fuses can power roadside transformers on powerline poles - free power for anyone nearby.
Values checked 2026-11-07 against wiki.facepunch.com, rust.facepunch.com, www.corrosionhour.com, rust.facepunch.com. Facepunch rebalances electricity now and then - if a number looks off in game, the game wins.
The Rust electricity calculator adds up the power your circuit needs: pick the components you want to run - turrets, SAM sites, lights, heaters, sensors, industrial machines - and it totals their draw, then shows how many solar panels, wind turbines, generators or batteries supply it. Power figures are each component's in-game consumption.