Shunts and Ground

An area for discussing the OutBack FLEXnet DC product.

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nautiqueskier
Forum Junior Member
Posts: 1
Joined: Mon May 06, 2019 9:44 pm

Shunts and Ground

Post by nautiqueskier » Mon May 06, 2019 11:03 pm

Hi there,

Need some assistance wiring a FlexNet. I have three shunts. My understanding is with shunts I will no longer ground the battery negative (ie. battery side of shunt) as that would effectively bypass the shunts.

Can the Outback Inverter and Outback FLEXmax Charge Controllers use a common ground even if they are on separate shunts?

Shunt A) Inverter (AC Circuits)
Shunt B) DC Circuits
Shunt C) Charge Controllers. I will be installing a GFDI as well.

Thanks

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Kurt Lundquist
Alpha Energy Engineering
Posts: 1331
Joined: Tue May 31, 2011 7:23 am
My RE system: VFX3524, Mate3, 200Ah 24V AGM Battery Bank
Location: Arlington, WA

Re: Shunts and Ground

Post by Kurt Lundquist » Tue May 07, 2019 7:23 am

nautiqueskier wrote:Can the Outback Inverter and Outback FLEXmax Charge Controllers use a common ground even if they are on separate shunts?
Yes!

The GFDI will be the point where you bond negative to ground. As long as you only have one negative to ground bond the extra resistance from the shunts will not be an issue.

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

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