Originally posted by heimdm
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4 ga copper wire amounts to about 0.12 ohms.
If a 33KW DC output is possible and transmission is at 300VDC, a current of
110A is possible, causing a voltage loss of 13.2V or about 4.4% loss. At 400VDC
it becomes 83A, causing a voltage loss of 10V or about 2.5% loss.
I would feel, that is pushing 4ga way too hard, and with too much loss. With DC
feeds combined to a single feed, you might reduce both the losses and the cost
by running something like 2/0 aluminum Triplex instead of 4ga copper. Even a bit
larger is cheap enough, if you can deal with the termination problems. Getting
that into conduit is not a problem I wanted, a 24 inch deep trench allows direct
burial.The 3rd wire of Triplex is smaller, for neutral or ground. Aluminum needs
go about 2 gauges larger, to match losses of copper.
Optimizers need to communicate, to operate correctly, can they do that at 200'?
Bruce Roe
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