Matching Outback inverers on powerboard? [RE-wrenches]

[Allan Sindelar]

Ron, I'll chime in here...
The breaker assemblies on the PS/2 are set up for two inverters, so that
isn't an issue.

There are no "factory prewired" systems, in my understanding (except the
PS1, which is for a different application and not relevant here). Some key
distributors of Outback products (Energy Outfitters, Hitney, Conergy, and
others) are certified by ETL to offer a listed package of preassembled
components.

The main reason we have not purchased any preassembled packages is that, in
our experience, most of the conductors that we terminate inside a PS/2 or
PS/4 come from outside the boxes. There is a best order for installing
wiring: grounding and equipment bonding conductors first, then signal, then
negative/neutral, then finally positive and AC hots. Along with that, large
conductors, such as battery/inverter cables are best installed toward the
last. All of this is hard to do with prewired systems (ever tried to thread
a #6 ground behind 7 existing conductors and make it neat?). By field wiring
the entire system, we believe we end up with a cleaner installation.

Having said that, I would advise otherwise, for one reason only: if this is
your first PS/2 installation, consider ordering it prewired. Use this
installation to see how an integrator would do it. You will have less to
figure out and less chance for error. You may decide to field-wire the next
one.

In your specific case, either approach will work if you have planned ahead.
You need to determine the role of the second inverter: more output at 120V?
240-volt loads? Both? Whether prewired or field-wired, those options take
different wiring approaches and may or may not require an X-240.

I hope this helps with your decision.
Allan @+E

----- Original Message ----- 
From: "Bob Ellison" <ellison at gisco.net
>
> Hi Ron,
> Maybe I m missing something but you would have to change the breaker
> assemblies to add another inverter as the bypass and other breakers for a
> single inverter are different (and more of them) for a dual inverter
system.
> Somewhere around that point you are back to the decision either to order
> prewired or wired. I guess that it just depends if you want the extra
parts
> in the shop on a shelf. If there is No chance of having to go with more
than
> 2 inverters the PS2 is easier to deal with, but if there is a chance that
it
> will expand further you will need the PS4
>
> -----Original Message-----
> From: Ron Young [mailto:solareagle at solareagle.com]
>
> Well so far I've gotten two interesting points of view. One that "warranty
> issues with the original assembled unit, it could be clouded by your
> upgrade" as stated by William Miller and the other that weight issues
always
> drive them to assemble their panels in the field and no sweat. I don't
> really think the warranty issues are likely to be a problem but I am
> concerned about ending up with some quirky little problem like maybe a
> difference in firmware revisions in two separately sourced inverters
> ...knock knock knocking on Murphy's door.
>
> Ron Young
>


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