Getting the output of two Quattro 5k hooked up in parallel to the distribution board

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billk asked Oct 21, '19

Getting the output of two Quattro 5k hooked up in parallel to the distribution board

Can't find much information on the subject. My inverters are about 25 feet (7.5 meters) from the board. A friend who has lots of electrical experience but not with solar systems is suggesting I just run the same lengths of wire from L1, neutral, and ground of each inverter to the board. Then connect the L1s to each lug, put both neutrals under the neutral lug and connect the grounds to the bus bar. Is this the most effective way to get the power to where I can put it to work and make sure the inverters are happy at the same time?

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Answer 1 · 2019-10-21T18:29:53Z

Murray van Graan answered · Oct 21, 2019 at 06:29 PM

Hi, read this: https://www.victronenergy.com/live/ve.bus:manual_parallel_and_three_phase_systems

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billk commented · Oct 21, 2019 at 08:35 PM

Oh boy have I read that article and I've had my friend read it as well. We are confused about several things. First what is the advantage to taking the LI output of each inverter to its own bus bar rather than cutting them to the same length and running them to the distribution board? Taking the neutrals from each inverter, running them to a bus bar and then running one neutral to the distribution board makes sense. The grounds shouldn't matter since they only carry current when something goes wrong.

At anyrate, for me, that paper seems to be more theory and less application. I was hoping someone who has successfully connected their two inverters to a distribution board could tell me what they did to make their success happen.

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Daniël Boekel (Victron Energy Staff) ♦♦ billk commented · Oct 21, 2019 at 10:08 PM

Hi @BillK

Can you draw a simple diagram of what you're writing in your first post? I'm not sure what you mean exactly with it...

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billk Daniël Boekel (Victron Energy Staff) ♦♦ commented · Oct 22, 2019 at 06:01 PM

Be happy to do that but it will take a bit for me to find my crayons and/or colored pencils. :)

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Daniël Boekel (Victron Energy Staff) ♦♦ billk commented · Oct 22, 2019 at 07:05 PM

Ah just be sure to use Victron blue also!

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billk Daniël Boekel (Victron Energy Staff) ♦♦ commented · Oct 22, 2019 at 07:27 PM

Indeed, it is a lovely shade of blue to be sure. My friend saved me from embarassing myself since I operate at the level of stick figures when it comes to diagrams. He took an existing diagram and modified it to show what I tried to express in my original question. Hope it provides more information.

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victron-quattro-split-phase-symmetry.png (110.9 KiB)

Fideri billk commented · Oct 24, 2023 at 06:40 PM

Hello @BillK

This is exactly what I was planning to do for a parallel setup until I read on this forum that I could exceed the neutrals' "CSA". The only major difference is that I'm dealing with 2 Quattros 10 KVA to create one single phase.

Fideri

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