GFDI wiring

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raysun
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My RE system: Flexpower One: FX3048T, (2) FM80, MATE3s, FlexNetDC
Outback 200NC batteries (8 @ 48v)
Outback IBR3 battery enclosure
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Hyundai 355 watt panels (6 - 3 strings of 2 in series)
Honda EU7000is gas fuel generator

GFDI wiring

Post by raysun » Wed Mar 06, 2019 5:33 pm

I'm installing a dual GFDI in my Flexpower 1. After removing the single GFDI and inspecting it, the labeling is confusing me. (See photo.)

The 80A disconnect is labeled BAT + on the Load side of the breaker, and CC+ (INV+) on the Line side of the breaker.

The original 80A breaker in the GFDI assembly was wired with the Battery + connected to the terminal labeled Line and CC+ (INV +), and the Charge Controller + lead was wired to the terminal labeled Load BAT +.

Does the labeling and wiring make sense at all?

My confusion comes from thinking the Line side of these DC breakers should be connected to the highest amperage source (in this case the battery), but the labeling implies the opposite. Am I misinformed on that?
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Kurt Lundquist
Alpha Energy Engineering
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Joined: Tue May 31, 2011 7:23 am
My RE system: VFX3524, Mate3, 200Ah 24V AGM Battery Bank
Location: Arlington, WA

Re: GFDI wiring

Post by Kurt Lundquist » Thu Mar 07, 2019 7:33 am

Follow the labels. Battery connection on Batt terminal and PV connection on PV terminal. Power flows from CC (line) to Battery (load).

-Kurt
Kurt Lundquist
Renewable Energy Project Engineer
http://alphaenergy.us/

raysun
Forum Emperor
Posts: 1718
Joined: Tue Jul 26, 2016 5:57 am
My RE system: Flexpower One: FX3048T, (2) FM80, MATE3s, FlexNetDC
Outback 200NC batteries (8 @ 48v)
Outback IBR3 battery enclosure
Suniva 330 watt panels (12 - 6 strings of 2 in series)
Hyundai 355 watt panels (6 - 3 strings of 2 in series)
Honda EU7000is gas fuel generator

Re: GFDI wiring

Post by raysun » Thu Mar 07, 2019 7:37 am

OK, will do.

(A bit scary that it was miswired at the factory though.)

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