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Related to questions:

So how much power does it take to connect to another stargate? Is it a constant value or does it vary?

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    Isn't the answer to any SF "how much power" question always 1.21 jigawatts? Aug 15, 2013 at 8:40
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    @DanielRoseman No; in Star Trek it's 1.47, plus or minus 0.042. And they always need to reroute power to accomodate any load.
    – user
    Aug 15, 2013 at 9:46
  • Pay a staff writer 50 bucks...
    – Oldcat
    Jul 2, 2014 at 21:45

4 Answers 4

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The gate that is being used to dial is always the one that supplies the initial power to both. Depending on the wiring of the gate, it takes between 12 and 24 volts of electricity to establish a stable wormhole (this is proven in the episode titled "1969" where they use jumper cables hooked to trucks to power up the gate. A gate only needs enough power to connect, because if the other gate has a DHD it would take over should the connecting gate fail. Hope this helps!

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    I don't think it's the voltage that matters so much as the energy needed. Voltage is only a partial component; it's a measure of potential difference between two points. Aug 15, 2013 at 6:23
  • Are they using the truck to directly power the stargate or to charge up the gate's capacitors?
    – Valorum
    Jul 2, 2014 at 19:43
  • I'm pretty sure there's at least two jeeps and a towable generator in that warehouse all wired to the gate. I'll have to rewatch it in case I'm mixing it up with when those rogue NID operators stole the stargate. But what I recall ought to add up to at least 50kw so not nothing if surprisingly little. I did get the sense they were at it for a while charging it up. Possibly hours shutting stuff off if a guard approached. Makes you wonder why they made such a big deal about using "10x the power" to dial Othala...
    – John LA
    Aug 16, 2019 at 6:13
  • Why does it take so much power to dial the 9th chevron, then, like in SGU? Nov 4, 2020 at 1:22
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In the episode Ascension Orlin builds a small stargate in Carter's home, so the power requirements for a stargate can be achieved with household grid connection. Here in Germany a typical household connection has around 14.5 kW, sometimes up to 34 kW (in case you have electrical heating). As per @Xantec's comment below, in the US the maximum can be as high as 44kW.

So it is safe to assume that 44kW is sufficient to build a stable stargate. (This also holds in case Orlin hat to use all sockets in the house, since 44kW is the rating of the whole household).

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  • The maximum rating for a US home may vary quite a bit depending on the age of the building and its mains wiring. I'm hardly an authority, but I'd venture it could range from around 11kW up to 44kW. An older house that has never had its wiring updated might be as low as 6.6kW.
    – Xantec
    Jul 1, 2014 at 20:41
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    Is he powering the Stargate directly or just using the mains electricity to charge up the capacitors?
    – Valorum
    Jul 2, 2014 at 19:42
  • IIRC, he was in the basement and probably plugged directly into the panel. There's no need to "use all sockets in the house".
    – T.J.L.
    Nov 4, 2020 at 15:44
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The majority of the power requirements for the activation of a wormhole are unspecified. Primary power to the gate is provided by ambient sources (background radiation, etc) which is continually being absorbed by the gate. It's only the activation of the gate which appears to require the use of an external source - necessary to unlock the ring to perform the dialling sequence.
While some/most of the power requirements for a standard wormhole can be handled by the gate itself, the power requirements are also relative to the distance travelled - hence the need for a ZPM or similar when opening a wormhole between galaxies - the external power source has to account for the difference between the power supply capabilities of the gate and the requirements for the trip. This may also account for why the SGC seems to require a constant power supply to operate their gate - the frequent use of the gate may not allow sufficient time to build up any reasonable store of energy for use.

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  • [citations needed]
    – T.J.L.
    Nov 4, 2020 at 15:43
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well, technically not much it would just take forever as the gate is basically a large capacitor. So the more power you input the more often you could dial so technically you could hook it up to the grid but it would basically have to charge.

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    Hi, welcome to SF&F. While true, this doesn't provide a useful answer to the question; you don't even try to estimate what the power requirements might be. You could even simplify things and assume the gate is dialed once a day, but you need to give some kind of number.
    – DavidW
    Nov 3, 2020 at 19:42

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