The setup order, because doing it backwards wastes five minutes
There is a correct sequence for a turret, and the two steps people skip are the two that cause every “my turret doesn’t work” moment.
- Face the direction you want it to watch, then place it. The turret’s 180° detection arc is set by where you were standing at the moment of placement. You can change the facing later from its use menu, but get it right first time and save the trip.
- Authorise yourself — before you power it. Hold E and pick Authorise.
- Load the weapon and the ammo, with the turret switched off. This is the step that trips up everybody on their first turret. A powered turret will not accept or change a weapon or ammo.
- Wire the power. At least 10 rW into Power In. Eleven if you are using the outputs.
- Pick the mode.
Skip step 2 and your own turret shoots you. Skip step 3 and you will spend five minutes wondering why it will not take a magazine.
The 11 rW trap
Everywhere you look, the answer to “how much power does a turret need” is 10 rW. That is correct, and it is also the reason a lot of base alarms do not work.
A turret has three output slots: Has Target, Low Ammo and No Ammo. Wiring any of them into a smart alarm, a siren light or a trap is one of the best things you can do with a turret — it turns a defensive deployable into an alarm that pings your phone through Rust+.
Each output costs 1 rW to push a signal. So the instant you use one, your turret is an 11 rW device, not a 10 rW one.
And the failure mode is nasty: build a circuit with exactly 10 rW per turret and the turret prioritises itself. It keeps shooting, and your alarm silently does nothing at the precise moment something walks into the arc. You do not get a warning light. You just do not get the ping.
Plan for 11. Four turrets with alarms is 44 rW, not 40.
What can actually power a turret
| Power source | Output | Turrets it runs |
|---|---|---|
| Large Solar Panel | 0-20 rW | 1 |
| Small Generator | 40 rW | 3 |
| Water Wheel | 0-30 rW in water (60 spun by hand) | 2 |
| Wind Turbine | 0-150 rW | up to 13 |
Every one of those except the generator is variable, which is why nobody serious wires a turret straight to a turbine.
Wire the turbine into a battery, and the battery into the turrets. The battery smooths out the dead air when the wind drops or the sun goes down, and it is what keeps the sentries awake at 3am while you are asleep.
| Battery | Max output | Capacity | Practical meaning |
|---|---|---|---|
| Small Rechargeable Battery | 15 rW | 400 rWm | One turret for 40 minutes — covers a wind lull, nothing more |
| Medium Rechargeable Battery | 50 rW | 9,000 rWm | — |
| Large Rechargeable Battery | 100 rW | 24,000 rWm | One turret through an entire offline night, with 30 hours to spare |
Those runtimes assume a fully charged battery with nothing recharging it, which is the worst case you should design for.
Convenient detail: the Large Rechargeable Battery is the tech tree node the auto turret sits behind, so if you are going the tree route you are buying the right battery on the way.
Twelve turrets, and then nothing
On 5 October 2023, in the Solid Foundations update, Facepunch added turret interference. Two convars govern it:
sentry.maxinterference— defaults to 12sentry.interferenceradius— defaults to 40
No more than 12 powered turrets will function within 40 metres of each other. Turn on a thirteenth and it powers up, emits a blue electrical glow, and acquires no targets at all. It is not broken and it is not out of ammo — it simply will not shoot anything.
The important distinction: there is no cap on how many turrets you can deploy, only on how many can be active at once. That is the whole design space:
- Wire spare turrets through a Smart Switch or an HBHF Sensor so they only power on when somebody is actually there, keeping your active count under 12 the rest of the time.
- Spread turret clusters more than 40 metres apart across a compound rather than stacking them on one loot room.
- An interference-disabled turret can still be remoted into from a Computer Station and fired manually, though the signal will be weak.
Check your server first. Plenty of modded and community servers change or remove this limit by setting the radius to zero, and some raise the cap. If you are on anything other than vanilla official, ask before you design a base around twelve.
The five things a turret needs, and the one a Smart Switch can’t do
A Smart Switch on a turret’s power bus supplies its electrical requirement. That is all it does. It does not:
- load ammunition
- choose targets
- extend line of sight
- change who the turret recognises as authorised
A working turret needs all five:
| Requirement | Notes |
|---|---|
| 10 rW (11 with outputs) | Into Power In |
| A compatible projectile weapon | In the weapon slot |
| Matching ammunition | In the ammo slots |
| Usable line of sight | 180° arc, 30 m range |
| Correct placement and authorisation | Facing set at placement; every user added individually |
Two wiring rules that save debugging:
Keep the door-control bus and the turret bus as separate, named Smart Switch endpoints. Otherwise you will close a door one day and discover you switched off your base’s guns.
Give the three outputs three separate named Smart Alarms. Has Target, Low Ammo and No Ammo carry very different urgency, so merging them into one alarm means the alert never tells you what action to take. A low-ammo ping means reload; a no-ammo ping means the defence is already unable to fire.
Automation: the turret that only wakes up when it matters
An armed turret draws power continuously even when nothing is in range. If you are power-tight, or you are trying to stay under the interference cap, you can make it arm only when there is actually someone there.
HBHF sensor plus an AND gate. The Human Body Heat and Frequency sensor reads players within a short radius, and its include/exclude list lets you whitelist your own team — so the sensor stays dark when friendlies walk past and only outputs power when an unauthorised body enters its cone.
Wire the battery feed through an Electrical Branch into the AND switch’s Input A, and the HBHF sensor output into Input B. The turret only receives power when both are live. The instant the intruder leaves the cone, the turret disarms and you stop burning battery.
The trade-off is a roughly half-second arm delay on first contact. That is fine for a perimeter pod and not fine for a last-ditch loot-room turret — keep those always-on.
Blocker plus a daylight detector, for sunset arming. Put a second, dedicated solar panel down purely as a daylight sensor — it outputs power only while the sun is up. Wire that into the Blocker’s control input, and run your main battery power through the Blocker’s power path to the turrets. During the day the signal blocks the path; at dusk the detector drops to 0 rW, the Blocker opens and the turrets arm. It reverses at dawn.
Placement: one turret, one lane, one job
The most common mistake is trying to make one turret cover two approaches. Give it one job.
- Elevated positions. Roof corners and raised platforms maximise the field of view.
- Cover the approach, not the front door. Position turrets to watch the blind spots and the routes players actually walk.
- Protect the turret itself. Surround it with walls or half-walls with a small firing slit, so grenades and rockets do not land clean.
- Overlapping fields of fire. If one goes down, another still covers the lane.
- Clearance. Do not place it jammed against a wall — it needs room to traverse its 180°.
Also worth knowing about the target list: Peacekeeper mode makes the turret engage only hostile NPCs — murderers and scientists — and ignore players entirely. That is the mode for a turret sitting near a monument where you do not want permanent player aggro.
Crafting versus looting
To craft one you need a Workbench Level 2 and:
- 25 High Quality Metal
- 1 CCTV Camera
- 1 Targeting Computer
45-second craft time.
Older guides still list the previous recipe — nolimit.host, for example, lists 1,000 metal fragments and 2 gears. That is out of date. The current recipe is the HQM one above.
You will usually get your first turrets from loot instead:
| Source | Chance | Notes |
|---|---|---|
| Locked Crate | 16% | 1 to 3 turrets — the single best drop in the game |
| Bradley APC crates | 5% | — |
| Elite crates | 2% | — |
| Military Crate | 1% | — |
| Scientists | 0.01%-small | Every type has a chance, down to a lottery ticket on Tunnel Dwellers |
One judgement call worth making before you build: turrets are only worth it if the wipe has time left on it. Check the countdown before you spend 400 scrap on a sentry that lives six hours.
Troubleshooting, in the order that actually finds the fault
| Symptom | Check |
|---|---|
| Turret has no power | Power In is connected, the source is on, and the circuit has 10 rW available for this turret |
| Powered but not firing | Weapon loaded, matching ammo, line of sight, range, and current target status |
| It targets a teammate | The authorised-user list — TC authorisation does not carry over |
| The thirteenth turret does nothing | You are over the 12-in-40 m cap |
| The alarm never pings | You budgeted 10 rW instead of 11 |
| Several devices stop working | Recalculate the circuit’s total load against source output |
The one-line version
Face it, authorise it, load it while it is off, give it 11 rW, and do not put a thirteenth within 40 metres.
Related guides
- how to destroy a turret
- best turret gun
- electricity guide
- base building guide
- best base designs
- how to move a tool cupboard
- how to get high quality metal
- how to get blueprint fragments
- how to open locked crate
- how to kill the bradley apc
- launch site guide
- monuments guide
- monument loot tables
- advanced guide