On Will Prowse’s YouTube post about the installation of two EG4 6500 all in one system I see that the PV array wires enter the disconnect switch as twisted pairs from each array and exit the disconnect as much more parallel wires. Somewhere long ago I think I remember reading that twisting DC wires prevents problems by preventing a field being established around parallel wires. What is correct, twisted DC wire runs or parallel wire runs.
Twisted or parallel
- Thread starter Off-Grid
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Following this for my build.
I've also read about running the wires a certain way to prevent RF interference and other issues. Iirc they should be wrapped together tightly but I'm not certain on them being twisted. There was also something about coiling excess.
Ampster
Renewable Energy Hobbyist
I remember years ago that twisted pair data cables worked to avoid interference on the DC signaling pairs on data wires. I do not know if it makes any difference with high voltage DC from solar panels. in the case of solar panels it is tupically a contant current not fluctuating like signale wires. I am not sure RF interference would matter for solar. Mine have to be in conduit for code and that is all I worried about.
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Hedges
I See Electromagnetic Fields!
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Twisting only makes a different for pickup/radiating of AC. (and I supposed DC magnetic field strength at a distance? Check with a compass.)
Twists may reduce false AFCI trips, from noise elsewhere being picked up. It may help with EMP hardening. May reduce emission of MPPT switching noise.
However, the serpentine layout of PV cells in a panel have loop area. Reducing cable loop area to zero by twisting them still leaves whatever loop area (antenna) the panels create.
Twists may reduce false AFCI trips, from noise elsewhere being picked up. It may help with EMP hardening. May reduce emission of MPPT switching noise.
However, the serpentine layout of PV cells in a panel have loop area. Reducing cable loop area to zero by twisting them still leaves whatever loop area (antenna) the panels create.
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