120 and 240 volt service via stacking

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bsshirkey1
Forum Expert
Posts: 66
Joined: Thu May 03, 2012 9:17 am
My RE system: off grid arrangement:
panels: 17,500W
CC: four flexmax 80s
inverters: flexware 1000 with four vfx 3648 inverters,
batteries: trojan flooded: 53.2kwh

120 and 240 volt service via stacking

Post by bsshirkey1 »

i just bought my second vfx3548 inverter. it came in the mail today. now i have two of the inverters, each will be on a midnite e-box.
i am currently powering all of my 120v breakers in my house with one inverter. i am about to set up the 2nd inverter so i can offer 240v as well, to my hot water heater.
i have the hub and the mate. do i also need to buy the x240 transformer? i don't understand if it's necessary or what is the purpose of it.

respectfully
bryan
SteveHiggins
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Location: Seattle

Re: 120 and 240 volt service via stacking

Post by SteveHiggins »

The transformer helps with stacking and balancing of the loads.

Without the xfmer to get 240 both inverters MUST be on.

With the Xfmer to get 240, or 120 on leg 2 only one inverter has to be on up to 12 amps of load...

If you don't have the xfmer then you can program the inverters in Classic stacking... If you had the xfmer you would program the inverters in Outback stacking.
Steve Higgins
Technical Services Director- Surrette Battery Company

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Kent Osterberg
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My RE system: SMA Sunny Boy 2500 with eight Mobil Solar Ra 180 modules
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Re: 120 and 240 volt service via stacking

Post by Kent Osterberg »

You don't have to have the X-240 transformer. Using it would save a little energy by allowing one inverter to sleep when the loads are light, but for a two inverter system it is a very small energy savings. The other advantage is that it allows both inverters to deliver power to one leg of the power system so the surge capacity of both inverters is available to start 120-volt loads. The disadvantage of the X-240 is 120 Hz hum. The inverters can be nearly silent while operating light loads, the X-240 is never silent.
bsshirkey1
Forum Expert
Posts: 66
Joined: Thu May 03, 2012 9:17 am
My RE system: off grid arrangement:
panels: 17,500W
CC: four flexmax 80s
inverters: flexware 1000 with four vfx 3648 inverters,
batteries: trojan flooded: 53.2kwh

Re: 120 and 240 volt service via stacking

Post by bsshirkey1 »

thanks gentlemen. i can now proceed with a little more confidence on the install of the second inverter.
bryan
darylhansen
Forum Junior Member
Posts: 2
Joined: Wed Oct 17, 2012 8:07 pm
My RE system: Flexware 500
FX2524T Inverters (2)

Re: 120 and 240 volt service via stacking

Post by darylhansen »

There is no "User Guide" for the Flexware 500 system. There is a "Mounting & Install" manual, but there is nothing to tie it all together. Both the FlexPower ONE and the Radian system manuals show a clear wiring diagram, but there is nothing remotely concise for the Flexware 500.

Why is there nothing available for the Flexware 500 system with the Auto Transformer? A clear diagram for off grid application is what I need.
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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: 120 and 240 volt service via stacking

Post by Kurt Lundquist »

OutBack Technical Support has line diagrams for many of the FLEXpower 2 pre-wired systems. Send an email to support@outbackpower.com for further assistance.
darylhansen
Forum Junior Member
Posts: 2
Joined: Wed Oct 17, 2012 8:07 pm
My RE system: Flexware 500
FX2524T Inverters (2)

Re: 120 and 240 volt service via stacking

Post by darylhansen »

Thanks. I emailed them and am waiting to hear back.
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