Classic Stacking - VFX3024E and VFXR3024E

Discussion about OutBack Inverters in Off Grid Applications

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wuyi
Forum Member
Posts: 9
Joined: Sat May 19, 2007 2:48 pm
My RE system: VFX3024E
Mate3s

Classic Stacking - VFX3024E and VFXR3024E

Post by wuyi »

Dear all,

I have a VFX3024E that has served me well for over 10yrs. Recently i decided to upgrade my system and bought a VFXR3024E with a view to connect in a classic stacking arrangement.
However, Mate3s reported the inverters as incompatible devices.
What are my possible solutions?

Regards
User avatar
EA6LE-ONE
Forum Czar
Posts: 611
Joined: Tue May 05, 2020 7:51 am
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: Classic Stacking - VFX3024E and VFXR3024E

Post by EA6LE-ONE »

Those two inverters are totally different even if the model name is so similar.
for staking you need 2 identical inverters with the same firmware.
best solution is to sell the vfx and buy another vfxr.
wuyi
Forum Member
Posts: 9
Joined: Sat May 19, 2007 2:48 pm
My RE system: VFX3024E
Mate3s

Re: Classic Stacking - VFX3024E and VFXR3024E

Post by wuyi »

Thank you.
Considering my remote location and limited chances of selling my VFX, is it possible to change the controller board or necessary parts in the VFX with a view to make both compatible?
User avatar
EA6LE-ONE
Forum Czar
Posts: 611
Joined: Tue May 05, 2020 7:51 am
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: Classic Stacking - VFX3024E and VFXR3024E

Post by EA6LE-ONE »

Maybe will be a good idea to keep the old VFX as a backup. I still have couple VFX3648 inverters that can be useful for an end of the world scenario (if all my radians blew and can't wait few weeks for replacements to arrive).
raysun
Forum Emperor
Posts: 5622
Joined: Tue Jul 26, 2016 5:57 am
My RE system: Flexpower Two: (2) FXR3048A-01, (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: Classic Stacking - VFX3024E and VFXR3024E

Post by raysun »

wuyi wrote: Thu Jul 29, 2021 5:10 am Thank you.
Considering my remote location and limited chances of selling my VFX, is it possible to change the controller board or necessary parts in the VFX with a view to make both compatible?
I'd be suprised if the VFX could be upgraded to a VFXR without wholesale parts replacement, if even then. I don't know a source for "E" series replacement parts, but the "A" series parts from a 3rd party are Control Board: US$256, AC Board US$256, Power Board US$520. There may be other parts (transformer, sensors, etc.) that have also changed specifications with the model change.

If parallel stacking for greater output is desired, the cheapest way with non-identical inverters would be to split the AC loads at the main AC panel, adding a sub panel to service part of the loads. That way, both inverters could be run - independently - each servicing a branch of the total "house" loads.

The above is not as elegant as the VFXR's more efficient stacking architecture, but if the VFX was servicing loads of the proper characteristics, Search mode could be used to improve efficiency.
wuyi
Forum Member
Posts: 9
Joined: Sat May 19, 2007 2:48 pm
My RE system: VFX3024E
Mate3s

Re: Classic Stacking - VFX3024E and VFXR3024E

Post by wuyi »

Thank you very much. Clearly seems better to buy another VFXR than go the route i was thinking (replacement of parts if possible).
Need some clarity - when you say "split the AC loads at the main AC panel, adding a sub panel to service part of the loads. That way, both inverters could be run - independently.." Does this mean each inverter will have a separate battery bank or can both still be attached to the same battery bank?

Regards
User avatar
EA6LE-ONE
Forum Czar
Posts: 611
Joined: Tue May 05, 2020 7:51 am
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: Classic Stacking - VFX3024E and VFXR3024E

Post by EA6LE-ONE »

They can be on the same battery bank. The only downside is the efficiency will be lower.
raysun
Forum Emperor
Posts: 5622
Joined: Tue Jul 26, 2016 5:57 am
My RE system: Flexpower Two: (2) FXR3048A-01, (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: Classic Stacking - VFX3024E and VFXR3024E

Post by raysun »

wuyi wrote: Fri Jul 30, 2021 10:02 am Thank you very much. Clearly seems better to buy another VFXR than go the route i was thinking (replacement of parts if possible).
Need some clarity - when you say "split the AC loads at the main AC panel, adding a sub panel to service part of the loads. That way, both inverters could be run - independently.." Does this mean each inverter will have a separate battery bank or can both still be attached to the same battery bank?

Regards
Each would be attached to the same battery bank.

Purchasing another VFXR is a far superior option. The inverter itself is more efficient than the older VFX units. The parallel stacking is easy to implement and works very well. (I use dual FXRs this way and am very happy how they handle loads.) The (V)FXR units have more sophisticated operating modes than the older units. I'm strictly off-grid, so don't use any of the grid-interactive modes, but Support mode alone is worth the investment for me. Having dual inverter chargers that work seamlessly together is another plus. Having full lithium battery support built in is another "future proof" feature.

The FX/FXR class architecture is rugged and reliable, as shown by long service lives, however nothing lasts forever. Replacing the "old soldier" with the new model should give similar years of faithful duty.

I sold my old FX series inverter to a friend about 60 seconds after mentioning its retirement. You may be suprised, even in a remote locale, that quality used gear can readily find a new home.
wuyi
Forum Member
Posts: 9
Joined: Sat May 19, 2007 2:48 pm
My RE system: VFX3024E
Mate3s

Re: Classic Stacking - VFX3024E and VFXR3024E

Post by wuyi »

Thank you to everyone. Much appreciated
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