Flexpower Two FXR parallel wiring

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raysun
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Posts: 4624
Joined: Tue Jul 26, 2016 5:57 am
My RE system: Flexpower Two: (2) FXR3048A, (2) FM80, MATE3s, FlexNetDC
SimpliPhi 48-3.8 (6 @ 48v)
Outback IBR3 battery enclosure
REC Alpha 440W panels - 2 arrays: each of 4 strings of 2 in series
Honda EU7000is gas fuel generator

Flexpower Two FXR parallel wiring

Post by raysun »

20201120_081700.jpg
When I installed our new Flexpower Two with dual FXR3048A inverters, I configured them for parallel stacking (120V single phase). The pre-wired configuration is for series stacking (240V split phase) with AC busses for L1, L2, and N. Each inverter is wired to one of the L1 and L2 busses. The input/bypass is configured for 240V.

Since the system is to be parallel stacked, I wired a 6GA jumper between the L1-L2 AC inputs, and L1-L2 AC outputs.

The generator (120V) is wired to the L1 AC input.

While doing this configuration, I had the nagging feeling that the wiring was too simple, and too clever by half.

Does anyone have experience with the Flexpower Two configuration? Can you tell me if its done properly? (See diagram.)
sodamo
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Posts: 1154
Joined: Mon Apr 03, 2006 1:55 am
My RE system: Totally off grid - Hamakua side, Big Island, Hi

36 Trina 280 & 16 Phono 250 in 48 volt array (fixed) 14080w
Radians GG8048/GS4048 w GSLCs
4 FM 80 charge controllers
Hub 10.3
FNDC w/3 shunts
Mate 3s
OpticsRE - MMKL - Ninole Hi
12 SimpliPhi 3.8
14Kw Kohler 14RESA Propane

Charging Only
2FX3048T
Hub
FNDC. - shared shunt feeds from Radian FNDC
Mate 3s
10Kw MEP 803a Military gen

Honda EU7000i

Davis VantagePro2 Wx Station
On line at: https://www.wunderground.com/dashboard/pws/KHININOL2
Location: Ninole, Hi

Re: Flexpower Two FXR parallel wiring

Post by sodamo »

I thought FXR didn’t use X240?

Curious, if your house is wired normally why not just keep FP2 as split phase 240?
David
Please visit http://vacation.ninolehawaii.com
raysun
Forum Emperor
Posts: 4624
Joined: Tue Jul 26, 2016 5:57 am
My RE system: Flexpower Two: (2) FXR3048A, (2) FM80, MATE3s, FlexNetDC
SimpliPhi 48-3.8 (6 @ 48v)
Outback IBR3 battery enclosure
REC Alpha 440W panels - 2 arrays: each of 4 strings of 2 in series
Honda EU7000is gas fuel generator

Re: Flexpower Two FXR parallel wiring

Post by raysun »

sodamo wrote: Fri Nov 20, 2020 10:52 am I thought FXR didn’t use X240?

Curious, if your house is wired normally why not just keep FP2 as split phase 240?
The X240 is in the stock wiring diagram, but not in my system.

I live in Ocean View, nothing is normal here. 😅

The house is wired 120V single phase only.
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EA6LE-ONE
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My RE system: System 1:
MATE3s, 3 x Radian GS8048A,
6 x FLEXmax 100, HUB10,
2 x EnergyCell 48V 2700RE,
1 x FLEXnet DC, 6 x FLEXware ICS Plus,
78 x PANASONIC VBHN325SA17 325W

System 2:
MATE3s, Radian GS8048A,
2 x FLEXmax 100, HUB10
1 x EnergyCell 48V 2700RE,
1 x FLEXnet DC, 2 x FLEXware ICS
21 x PANASONIC VBHN325SA17 325W
Location: Providenciales, Turks & Caicos Isl.

Re: Flexpower Two FXR parallel wiring

Post by EA6LE-ONE »

If there is no autotransformer is fine. just don't change the stack mode :).
sodamo
Forum Emperor
Posts: 1154
Joined: Mon Apr 03, 2006 1:55 am
My RE system: Totally off grid - Hamakua side, Big Island, Hi

36 Trina 280 & 16 Phono 250 in 48 volt array (fixed) 14080w
Radians GG8048/GS4048 w GSLCs
4 FM 80 charge controllers
Hub 10.3
FNDC w/3 shunts
Mate 3s
OpticsRE - MMKL - Ninole Hi
12 SimpliPhi 3.8
14Kw Kohler 14RESA Propane

Charging Only
2FX3048T
Hub
FNDC. - shared shunt feeds from Radian FNDC
Mate 3s
10Kw MEP 803a Military gen

Honda EU7000i

Davis VantagePro2 Wx Station
On line at: https://www.wunderground.com/dashboard/pws/KHININOL2
Location: Ninole, Hi

Re: Flexpower Two FXR parallel wiring

Post by sodamo »

Why not an FXR wiring diagram? Can you be certain there are no other changes?

True, but I doubt OV has special components. When I did my cottage years ago, it was for a 120 system. When I upgraded to my Quad FX I simply removed the jumper in my distribution panel.
David
Please visit http://vacation.ninolehawaii.com
raysun
Forum Emperor
Posts: 4624
Joined: Tue Jul 26, 2016 5:57 am
My RE system: Flexpower Two: (2) FXR3048A, (2) FM80, MATE3s, FlexNetDC
SimpliPhi 48-3.8 (6 @ 48v)
Outback IBR3 battery enclosure
REC Alpha 440W panels - 2 arrays: each of 4 strings of 2 in series
Honda EU7000is gas fuel generator

Re: Flexpower Two FXR parallel wiring

Post by raysun »

sodamo wrote: Fri Nov 20, 2020 11:01 am Why not an FXR wiring diagram? Can you be certain there are no other changes?

True, but I doubt OV has special components. When I did my cottage years ago, it was for a 120 system. When I upgraded to my Quad FX I simply removed the jumper in my distribution panel.
There's no FXR series parallel stack wiring diagram that i could find. The Flexpower Two Offgrid (NA) wiring diagram was the closest I could find. The wiring in the diagram conforms with wiring on the panel, so I assumed it was the document of record.

When our house was originally wired, we were using a single FX3048T and was 120V only. I never really considered how the electrician wired the AC side of things.

@sodamo it turns out you are genius! Looking at the distribution panel in the power room, it is wired L1-N-L2. What threw me is all the breakers are on one "side" (L1). L2 is not connected to anything.

I'm going to follow your suggestion, and reconfigure for series stacking. I'll have to move some circuits in three panels/sub panels, but that should be pretty straight forward.

Mahalo nui loa!
sodamo
Forum Emperor
Posts: 1154
Joined: Mon Apr 03, 2006 1:55 am
My RE system: Totally off grid - Hamakua side, Big Island, Hi

36 Trina 280 & 16 Phono 250 in 48 volt array (fixed) 14080w
Radians GG8048/GS4048 w GSLCs
4 FM 80 charge controllers
Hub 10.3
FNDC w/3 shunts
Mate 3s
OpticsRE - MMKL - Ninole Hi
12 SimpliPhi 3.8
14Kw Kohler 14RESA Propane

Charging Only
2FX3048T
Hub
FNDC. - shared shunt feeds from Radian FNDC
Mate 3s
10Kw MEP 803a Military gen

Honda EU7000i

Davis VantagePro2 Wx Station
On line at: https://www.wunderground.com/dashboard/pws/KHININOL2
Location: Ninole, Hi

Re: Flexpower Two FXR parallel wiring

Post by sodamo »

raysun wrote: Fri Nov 20, 2020 11:43 am
sodamo wrote: Fri Nov 20, 2020 11:01 am Why not an FXR wiring diagram? Can you be certain there are no other changes?

True, but I doubt OV has special components. When I did my cottage years ago, it was for a 120 system. When I upgraded to my Quad FX I simply removed the jumper in my distribution panel.
There's no FXR series parallel stack wiring diagram that i could find. The Flexpower Two Offgrid (NA) wiring diagram was the closest I could find. The wiring in the diagram conforms with wiring on the panel, so I assumed it was the document of record.

When our house was originally wired, we were using a single FX3048T and was 120V only. I never really considered how the electrician wired the AC side of things.

@sodamo it turns out you are genius! Looking at the distribution panel in the power room, it is wired L1-N-L2. What threw me is all the breakers are on one "side" (L1). L2 is not connected to anything.

I'm going to follow your suggestion, and reconfigure for series stacking. I'll have to move some circuits in three panels/sub panels, but that should be pretty straight forward.

Mahalo nui loa!
Strange given time FXR had been available

Very interesting. Of course you will need to feed an L2 line as well. I had to run nearly 350ft underground in conduit, all lines when I made my upgrade as I was replacing the “at cottage” system with the house system. That allowed me to remove PV etc. Now the cottage is just another breaker in my main panel.
David
Please visit http://vacation.ninolehawaii.com
raysun
Forum Emperor
Posts: 4624
Joined: Tue Jul 26, 2016 5:57 am
My RE system: Flexpower Two: (2) FXR3048A, (2) FM80, MATE3s, FlexNetDC
SimpliPhi 48-3.8 (6 @ 48v)
Outback IBR3 battery enclosure
REC Alpha 440W panels - 2 arrays: each of 4 strings of 2 in series
Honda EU7000is gas fuel generator

Re: Flexpower Two FXR parallel wiring

Post by raysun »

Ironically, our Ohana was wired L1-N-L2-G, and its on the main panel.

The main house is wired L1-N-G, it appears. The dual pole breaker has no connection to L2.

I guess I'll have to get my electrician back in to run the L2 line.
sodamo
Forum Emperor
Posts: 1154
Joined: Mon Apr 03, 2006 1:55 am
My RE system: Totally off grid - Hamakua side, Big Island, Hi

36 Trina 280 & 16 Phono 250 in 48 volt array (fixed) 14080w
Radians GG8048/GS4048 w GSLCs
4 FM 80 charge controllers
Hub 10.3
FNDC w/3 shunts
Mate 3s
OpticsRE - MMKL - Ninole Hi
12 SimpliPhi 3.8
14Kw Kohler 14RESA Propane

Charging Only
2FX3048T
Hub
FNDC. - shared shunt feeds from Radian FNDC
Mate 3s
10Kw MEP 803a Military gen

Honda EU7000i

Davis VantagePro2 Wx Station
On line at: https://www.wunderground.com/dashboard/pws/KHININOL2
Location: Ninole, Hi

Re: Flexpower Two FXR parallel wiring

Post by sodamo »

Interesting.
Almost puts my conversation with my electrician in perspective. When I hired ours for the house build he was insistent he had to know about the solar. I told him the house was to be wired normally and the solar would hook up just like HELCO, L1, L2, N, G.
David
Please visit http://vacation.ninolehawaii.com
raysun
Forum Emperor
Posts: 4624
Joined: Tue Jul 26, 2016 5:57 am
My RE system: Flexpower Two: (2) FXR3048A, (2) FM80, MATE3s, FlexNetDC
SimpliPhi 48-3.8 (6 @ 48v)
Outback IBR3 battery enclosure
REC Alpha 440W panels - 2 arrays: each of 4 strings of 2 in series
Honda EU7000is gas fuel generator

Re: Flexpower Two FXR parallel wiring

Post by raysun »

sodamo wrote: Fri Nov 20, 2020 1:21 pm Interesting.
Almost puts my conversation with my electrician in perspective. When I hired ours for the house build he was insistent he had to know about the solar. I told him the house was to be wired normally and the solar would hook up just like HELCO, L1, L2, N, G.
When we built our house, I was busy in the last days before move in with standing up the solar infrastructure. My electrician came in and wired all the AC in basically one day. He had 4GA in his truck, and I remember him saying he was going to run 100A line to the house. I wasn't thinking 240V was in my future, so didn't insist he run the extra copper. In retrospect, I should have.
sodamo
Forum Emperor
Posts: 1154
Joined: Mon Apr 03, 2006 1:55 am
My RE system: Totally off grid - Hamakua side, Big Island, Hi

36 Trina 280 & 16 Phono 250 in 48 volt array (fixed) 14080w
Radians GG8048/GS4048 w GSLCs
4 FM 80 charge controllers
Hub 10.3
FNDC w/3 shunts
Mate 3s
OpticsRE - MMKL - Ninole Hi
12 SimpliPhi 3.8
14Kw Kohler 14RESA Propane

Charging Only
2FX3048T
Hub
FNDC. - shared shunt feeds from Radian FNDC
Mate 3s
10Kw MEP 803a Military gen

Honda EU7000i

Davis VantagePro2 Wx Station
On line at: https://www.wunderground.com/dashboard/pws/KHININOL2
Location: Ninole, Hi

Re: Flexpower Two FXR parallel wiring

Post by sodamo »

Interesting. Have to double check bu pretty sure my electrician ran all the subs on 70 amp breakers, if any not 70, they are 60. All are double pole taking 240 to the subpanels. My only actual 240 circuits are in the tractor shed and pool house, both for pumps. Running 240 to the cottage was just being consistent. I had installed the panel up there originally so I knew it was just jumpered.
David
Please visit http://vacation.ninolehawaii.com
raysun
Forum Emperor
Posts: 4624
Joined: Tue Jul 26, 2016 5:57 am
My RE system: Flexpower Two: (2) FXR3048A, (2) FM80, MATE3s, FlexNetDC
SimpliPhi 48-3.8 (6 @ 48v)
Outback IBR3 battery enclosure
REC Alpha 440W panels - 2 arrays: each of 4 strings of 2 in series
Honda EU7000is gas fuel generator

Re: Flexpower Two FXR parallel wiring

Post by raysun »

sodamo wrote: Fri Nov 20, 2020 4:53 pm Interesting. Have to double check bu pretty sure my electrician ran all the subs on 70 amp breakers, if any not 70, they are 60. All are double pole taking 240 to the subpanels. My only actual 240 circuits are in the tractor shed and pool house, both for pumps. Running 240 to the cottage was just being consistent. I had installed the panel up there originally so I knew it was just jumpered.
He ran 100A wire, but only 60A service. (Two 30A ganged breakers actually.) I think he used the wire because he had it on hand, more than trying to over-accomodate my 3kW inverter.
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