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 <[email protected]
<mailto:[email protected]>> 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:[email protected]
Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for
Windows 10
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