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Rust electricity is a chain: a source makes power, a battery stores it, distribution parts divide or combine it, logic parts control it, and devices consume it. Power is shown in rW (the delivery rate) and batteries in rWm (stored energy). Solar panels stop producing power at night, so any circuit that must run continuously—especially turrets—needs battery storage.

The figures below are the values reported by current community guides, with conflicts called out where guides disagree. Rustly says its database was read from game files for build 2634.289.1 on 9 October 2026, but that is not an official Facepunch statement. Check the electrical readout in your current build before committing to a large base circuit.

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How Rust electricity works

Every circuit has four practical layers:

  1. Source: solar panels, wind turbines or a small generator create rW.
  2. Storage: a battery accepts incoming power and supplies it when the source is weak or offline.
  3. Distribution and control: Root Combiners, Electrical Branches, switches, timers, counters and Blockers route power.
  4. Load: turrets, SAM sites, Tesla coils, furnaces, doors, sensors and alarms consume power.

Think of rW as a flow rate rather than a stockpile. A 100 rW battery output can feed loads totaling up to 100 rW at that point in the circuit; its rWm capacity determines how long it can continue when the source is not producing. Components also consume some power, so include their draw when sizing a circuit.

Power sources compared

Source Reported output Availability and placement Best use
Solar Panel Up to about 20 rW Daylight only; 0 rW at night. Output varies with sun exposure. Quiet daytime generation feeding a battery.
Wind Turbine About 50 rW at ground level; about 90 rW at two floors; about 130–150 rW at four or more floors Needs clear sky above it. Height substantially affects the reported output. Primary or supplementary generation for a permanent base.
Small Generator Steady 40 rW Runs while supplied with low-grade fuel. Backup power or temporary power when renewable output is insufficient.

These source figures come from the Supercraft electricity guide, the RustMods guide, the RustStats guide and the Rustly guide. They are guide values, not a guaranteed output under every weather, orientation or game-build condition.

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Solar panels

A panel can produce roughly 20 rW in daylight but nothing at night. Connect it to a battery rather than directly to a device that must stay online. During the day, the panel first covers the connected load and sends surplus into storage; after sunset, the battery becomes the source.

Wind turbines

Elevation is the important variable. Community guides report approximately 50 rW at ground level, 90 rW at two floors and 130–150 rW at four or more floors. Build the turbine where roofs, terrain and other structures do not obstruct the sky. Use the electrical readout after placement instead of assuming a particular height will always produce the top figure.

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Small generators

A small generator is listed at a steady 40 rW, but it burns low-grade fuel continuously. It is usually more sensible as an emergency source, a temporary construction supply or a supplement during a shortfall than as the only long-term source for a large base.

Battery storage and overnight power

Battery Reported maximum output Reported capacity Practical implication
Small Battery 10 rW 150 rWm Suitable for a very small circuit; limited output and reserve.
Medium Battery 50 rW Not stated in the cited guides Useful for medium loads when a 10 rW output limit is too low.
Large Battery 100 rW 24,000 rWm The reference battery for larger bases and overnight loads.

The output and capacity figures are reported by Rustly’s power-usage database and its electricity guide. The same guides cite storage efficiency of about 80 percent. They also give a rule of thumb of at least one Large Battery per 100 rW of load for carrying a base overnight. A Large Battery is described as draining in about four hours at full load; treat that as a guide estimate for the cited configuration, not a universal runtime promise.

Capacity and output are separate constraints. A battery can have enough stored rWm for a long reserve but still fail if its maximum rW output is below the instantaneous demand. Conversely, a battery with enough output can empty quickly if its stored capacity is too small. Add device, switch and logic consumption before choosing the battery count.

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The recommended base architecture

For a circuit that must work day and night, use this order:

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  1. Place the source: solar, wind, generator or a combination.
  2. Feed the source into a battery. Do not make a solar or wind line the only direct feed for a night-time defense device.
  3. Take the battery output to an Electrical Branch or another control component.
  4. Use switches, timers, counters or a Blocker to decide when individual loads receive power.
  5. Connect the controlled outputs to devices and verify their live consumption in the electrical UI.

Guides specifically advise against wiring turrets directly to solar or wind. The Supercraft guide and Nolimithost automation guide both recommend routing renewable generation through a battery.

Step-by-step: a solar-powered device circuit

  1. Place and aim the panel. Put the Solar Panel where it receives daylight and connect its output cable to the battery input.
  2. Confirm charging. During the day, check that the battery is receiving power. A panel that is shaded or facing poorly may not deliver the expected approximately 20 rW.
  3. Take power from the battery output. Use the battery output as the stable source for the rest of the circuit. This is what allows the circuit to continue after sunset.
  4. Insert an Electrical Branch. Set its branch amount to the load you want to reserve, connect Branch Out to that load, and use Power Out for the remainder of the main line.
  5. Add a control device. Put a switch between the branch and the device when you need manual isolation, or use a timer, sensor or Blocker for automation.
  6. Test both operating periods. Verify the device while the panel is producing and again after dark. Watch the battery’s stored energy and output rather than testing only at midday.

Community guides suggest sizing solar generation at roughly four times the connected load so that the battery can recharge during the day, but the guides differ on the exact sizing rule. Use this as a starting point and adjust for your actual daylight production, battery losses and the hours the load must run.

Distribution and logic components

Root Combiner

A Root Combiner merges two power sources into one output. It is useful when, for example, renewable generation and a backup source need to feed the same downstream battery or circuit. Confirm the resulting input and output readings after wiring; combining sources does not remove the output limits of the battery or downstream components.

Electrical Branch

The Facepunch Electrical Branch page describes a component with a Branch Out port and a Power Out port. Set the branch amount to peel a defined quantity from the main line for a priority load, while the Power Out path carries the remaining supply. This makes it possible to reserve power for a turret, sensor or control circuit without letting that load consume the entire line.

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Blocker

A Facepunch Blocker stops passthrough while power arrives at its second input. Use that behavior to disable a circuit during a condition such as daylight, an alarm state or a timer window. If a downstream device unexpectedly loses power, inspect the Blocker’s control input as well as its main input.

Logic components

AND, OR, XOR, Timer and Counter components are reported at about 1 rW each by the Rustly power-usage database. One component is small, but a large automation network can accumulate meaningful overhead. Include every logic element in the branch or battery calculation.

Common device power draws

Device Figure reported by guides Qualification
Auto Turret 10 rW is the common figure RustMods lists 25 rW. Another guide says 11+ rW is needed for Has Target, Low Ammo and No Ammo outputs; that behavior is not confirmed by an official source. Verify the current build in game.
SAM Site 25 rW Reported consistently across the cited guides.
Tesla Coil 25 rW Rustly says a full 25 rW supply produces its maximum 35-damage shocks.
Electric Furnace Conflicting: 3 rW or 60 rW The Facepunch wiki value cited in the guides is 3 rW, while RustMods lists 60 rW. Treat the value as unresolved until checked in your build.
Door Controller About 1 rW Guide estimate.
HBHF Sensor About 1 rW Guide estimate.
Smart Alarm or Smart Switch About 1 rW Guide estimate.

The auto-turret disagreement is significant when planning a defense grid. Most guides use 10 rW, while RustMods uses 25 rW and reports a maximum of 12 turrets within a 40 m radius. Because the 25 rW figure and the 12-turret limit are not reconciled by an official source, leave headroom and test one powered turret before duplicating a circuit across the base.

How to size a circuit

1. Add the continuous loads

Write down every device that can be powered at the same time. For a conservative turret circuit, calculate once with the common 10 rW figure and again with the 25 rW figure. For an uncertain electric-furnace circuit, calculate both 3 rW and 60 rW scenarios until you verify the in-game readout.

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2. Add control overhead

Include roughly 1 rW for each AND, OR, XOR, Timer, Counter, Door Controller, HBHF Sensor, Smart Alarm or Smart Switch listed in your circuit. A circuit with eight such parts adds approximately 8 rW before the main devices are counted.

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3. Check battery output

Compare the simultaneous load with the battery’s output ceiling: about 10 rW for Small, 50 rW for Medium and 100 rW for Large in the cited guides. If your peak demand exceeds that ceiling, split the load across batteries or use a battery with a higher output rating.

4. Check stored energy

Use the required runtime, not just the daytime load, to judge capacity. A Large Battery’s reported 24,000 rWm capacity and roughly four-hour full-load estimate make it the usual reference for overnight planning. The cited approximately 80 percent storage efficiency means the nameplate capacity should not be treated as perfectly usable energy.

5. Provide recharge margin

Renewables must cover the active load and refill the battery. The guides’ approximate four-to-one solar-sizing rule is only a starting point because daylight, panel output and losses vary. If the battery’s stored energy is lower each evening than the previous evening, increase generation, reduce the load or add storage.

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Example planning scenarios

One night-time turret

Using the common 10 rW turret figure, a Small Battery’s 10 rW output is only at the limit before any switch or sensor is added. A Medium or Large Battery provides more output headroom. If your build reports 25 rW for the turret, a Small Battery cannot supply it at all, so use a battery with a higher output rating and size storage for the hours of operation.

Several turrets and a SAM site

Add the turret figures you are actually observing, then add 25 rW for the SAM site and approximately 1 rW per control component. Compare the total with the 100 rW output of a Large Battery. If the total is near that ceiling, divide the defense network into separate battery branches so one load cannot starve every other device.

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Electric furnaces

Do not copy a furnace circuit from a guide without checking its version. A 3 rW assumption and a 60 rW assumption produce radically different battery and generator requirements. Measure the furnace’s live draw in your server build, record whether the number changes while smelting, and size the branch using the observed peak.

Automation patterns that avoid common failures

Day/night defense control

Keep turrets connected to battery storage, then use a switch or logic network to control when they are armed. The battery remains the source after sunset; the control layer determines whether the device receives the branch output.

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Priority loads

Place an Electrical Branch immediately after the battery. Reserve the branch amount for the load that must never be starved, and pass the remainder through Power Out to less-critical devices. This is more predictable than attaching every device to one undivided line.

Backup generation

Use a Root Combiner to bring renewable and backup sources into the same supply design, then monitor the battery. A generator can maintain a 40 rW contribution while solar is offline, but its fuel consumption makes it expensive as a permanent base load.

Conditional shutdown

Feed a Blocker’s control input from the condition that should suppress a circuit. If power reaches that second input, the Blocker stops passthrough. Timers and Counters can provide time- or event-based control, while AND, OR and XOR components combine conditions at approximately 1 rW each.

Troubleshooting checklist

  • Everything turns off after sunset: the device is probably connected directly to solar or wind, or the battery is not receiving charge. Insert the battery between source and load and confirm daytime charging.
  • The battery is charged but the device is dead: check the battery’s output limit, branch amount, switch state and Blocker control input. A charged battery can still be unable to deliver the required rW.
  • The battery empties before morning: reduce simultaneous loads, add storage or generation, and account for the approximately 80 percent storage efficiency cited by guides. Check whether the current build reports a higher device draw than the value you used.
  • A branch starves the rest of the base: lower the branch amount and verify which port feeds the priority device. The Power Out path should carry the remainder.
  • Turret status outputs do not work: one guide claims 11+ rW is required for Has Target, Low Ammo and No Ammo outputs, but that figure is not confirmed officially. Test the behavior in your build and do not assume the common 10 rW figure includes every status output.
  • Wind output is unexpectedly low: raise the turbine, clear overhead obstructions and read the actual output. The cited guide values rise from about 50 rW at ground level to 130–150 rW at four or more floors.
  • Furnace calculations are wildly different from a guide: the published figures conflict at 3 rW versus 60 rW. Measure the live draw in the current build rather than choosing the more convenient number.

Which published numbers should you trust?

A Facepunch news post about the Electric Anniversary lists launch-era values of 30 maximum solar energy and 10 energy for a Small Battery: Facepunch Electric Anniversary. Those figures differ from current community-guide values and the post’s year is not established in the available record, so they should not be used as current specifications without an in-game check.

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The Facepunch wiki pages for Electrical Branch and Blocker document those components directly, but the Auto Turret and Solar Panel wiki pages were not available in the cited material. For disputed device draws, use the electrical readout in the exact server build you play. Rustly’s 9 October 2026 build reference is the newest date in the cited material, yet it remains a third-party claim rather than a Facepunch version note.

Practical build checklist

  • Choose a source appropriate to the load: solar for daytime generation, elevated wind for larger continuous output, and a generator for fuel-backed backup.
  • Put a battery between renewable generation and every device that must work at night.
  • Check both battery output and stored capacity; neither one replaces the other.
  • Use Electrical Branches to reserve power, Root Combiners to merge sources and Blockers or logic parts to automate conditions.
  • Count switches, sensors and logic components in the total load.
  • Use conservative turret and furnace figures when planning, then replace assumptions with measurements from your current build.
  • Leave recharge margin so the battery finishes each daylight period at least as full as it began.

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