[RE-wrenches] 230Vac load on OB FX2524T system

[Ray]

The transformer balances the legs, each leg being fed by a separate 
inverter.  We're not in disagreement.

The stacking mode I described is if he didn't use the T former. I prefer 
the non T former set up,  as I've seen several cases were the master 
inverter was over worked, and had to be rebuilt and/ or have its fan 
replaced within 5 to 8 years.

Ray Walters
Remote Solar
303 505-8760

On 7/25/19 8:45 AM, Jay wrote:
> Hi Ray,
>
> I am going to disagree with you.
> The transformer in OB stacking mode balances the inverter outputs and 
> allows out of balance phase power. Depending on how you set the power 
> save mode it’ll use master then trigger slave to turn on about  1000 
> watts. But you could have 2000 watts on leg 1 with each inverter doing 
> 1000 watts.
>
> As to the mode, you need OB stacking, not classic stacking for the use 
> of the balancing transformer.
>
> Jay
>
>
> On Jul 24, 2019, at 9:43 PM, Ray <ray at solarray.com 
> <mailto:ray at solarray.com>> wrote:
>
>> The transformer is just to balance the legs, and isn't necessary to 
>> run the heat pump with 2 inverters.  On the programming, port 1 
>> should be /stack //1-2 ph Master/, and then set port 2 to /Classic 
>> slave./
>>
>> BTW,  we as an industry should move far away from this archaic and 
>> offensive labeling.  Master? Slave?   My daughter heard me mention 
>> that the other day and was mortified, as all of us should be too.  
>> Gentlefolks, it's time for some 21st Century solar Vocabulary.
>>
>> Ray Walters
>> Remote Solar
>> 303 505-8760
>> On 7/24/19 6:08 PM, David Palumbo wrote:
>>>
>>> I apologize for my ignorance on this issue, but in all my years I 
>>> have never had to power a 230V load with an OutBack system before.
>>>
>>> A couple of quick questions. It is a 8 year old OutBack system with 
>>> two FX2524T’s presently powering two 120Vac legs with no 240Vac output.
>>>
>>>   * Homeowner is adding a Fujitsu mini split heat pump for air
>>>     conditioning the home (summers are getting hot enough for AC
>>>     even in northern Vermont).
>>>   * It uses 7.9 Amps @ 230Vac
>>>   * I have a OB PSX-240 Autoformer manufactured in 2008 in my
>>>     inventory here. Should I use it for this application?
>>>   * Do I wire it up just like in this schematic?
>>>   * If so, what do I change in the programing on the Mate? Presently
>>>     it is ADV/FX/STACK  stack 1-2ph Master. Do I simply change it to
>>>      ADV/FX/STACK  stack Classic Slave?
>>>
>>> Thanks,
>>>
>>> Dave Palumbo, Independent Power, Hyde Park, VT
>>>
>>> cid:image003.jpg at 01D54135.D30AA520
>>>
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