Re: [RE-wrenches] AC combiners

[Jason Szumlanski]

I agree with Dave - spring for the AC combiner. If you market is so
competitive that $75 makes a difference, move to Florida... on second
thought... :)

Jason Szumlanski

On Fri, Oct 24, 2014 at 1:39 PM, Dave Click  wrote:

>  Bill, typically inverters have a max OCPD that can be installed on their
> output, and these sizes are generally not large enough to accommodate two
> same-model inverters. And manuals often note that you need to have a
> dedicated OCPD anyway. At least if I were ever to double-up two inverters
> on a single breaker, I'd want to make sure I had clearance from the
> manufacturer to do so. Or... just buy the $75 box to combine the two.
>
> DKC
>
>
>
> On 2014/10/24 11:05, frenergy wrote:
>
> Wrenches,
>
> ...its the little things.  Recently someone here brought up the
> issue of combining AC outputs prior to backfeeding the "solar" CB in the
> mains panel.  In the past I've run AC outs from inverters into a small AC
> dist panel, backfeeding CBs and then ran my combined AC out from a larger
> CB or the busses themselves to the backfed CB in the mains panel.  Is this
> overkill?
>
>It does seem as though, at least for just 2 inverters, this
> could be done with just split bolts in a gutter or dedicated J-boxor a
> power distribution block??  Or...??  (no wire nuts, thank you) Your ideas
> appreciated.
>
> Bill
> Feather River Solar Electric
>
>
>
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Re: [RE-wrenches] AC combiners

[Glenn Burt]

It seems that 690.64(B)1 (2008) prohibits anything but landing the outputs on 
dedicated breakers or disable disconnecting means.

Glenn 

-Original Message-
From: "frenergy" 
Sent: ‎10/‎24/‎2014 11:05
To: "RE-wrenches" 
Subject: [RE-wrenches] AC combiners

Wrenches,

...its the little things.  Recently someone here brought up the issue 
of combining AC outputs prior to backfeeding the "solar" CB in the mains panel. 
 In the past I've run AC outs from inverters into a small AC dist panel, 
backfeeding CBs and then ran my combined AC out from a larger CB or the busses 
themselves to the backfed CB in the mains panel.  Is this overkill?

   It does seem as though, at least for just 2 inverters, this could be 
done with just split bolts in a gutter or dedicated J-boxor a power 
distribution block??  Or...??  (no wire nuts, thank you) Your ideas appreciated.

Bill
Feather River Solar Electric___
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Re: [RE-wrenches] AC combiners

[Dave Click]

Bill, typically inverters have a max OCPD that can be installed on their 
output, and these sizes are generally not large enough to accommodate 
two same-model inverters. And manuals often note that you need to have a 
dedicated OCPD anyway. At least if I were ever to double-up two 
inverters on a single breaker, I'd want to make sure I had clearance 
from the manufacturer to do so. Or... just buy the $75 box to combine 
the two.


DKC


On 2014/10/24 11:05, frenergy wrote:

Wrenches,
...its the little things.  Recently someone here brought up 
the issue of combining AC outputs prior to backfeeding the "solar" CB 
in the mains panel.  In the past I've run AC outs from inverters into 
a small AC dist panel, backfeeding CBs and then ran my combined AC out 
from a larger CB or the busses themselves to the backfed CB in the 
mains panel.  Is this overkill?
   It does seem as though, at least for just 2 inverters, this 
could be done with just split bolts in a gutter or dedicated 
J-boxor a power distribution block??  Or...?? (no wire nuts, thank 
you) Your ideas appreciated.

Bill
Feather River Solar Electric


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Re: [RE-wrenches] AC combiners

[William Miller]

Bill:

 

There was an extensive discussion here on this exact subject recently.  If I 
may be so bold, I believe we reached consensus that it is best practice that 
each inverter have a dedicated disconnecting means for allowing servicing, if 
for no other reason.

 

William

 

 

Gradient Cap_mini
Lic 773985
millersolar.com  
805-438-5600

 

From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf 
Of frenergy
Sent: Friday, October 24, 2014 8:05 AM
To: RE-wrenches
Subject: [RE-wrenches] AC combiners

 

Wrenches,

 

...its the little things.  Recently someone here brought up the issue 
of combining AC outputs prior to backfeeding the "solar" CB in the mains panel. 
 In the past I've run AC outs from inverters into a small AC dist panel, 
backfeeding CBs and then ran my combined AC out from a larger CB or the busses 
themselves to the backfed CB in the mains panel.  Is this overkill?

 

   It does seem as though, at least for just 2 inverters, this could be 
done with just split bolts in a gutter or dedicated J-boxor a power 
distribution block??  Or...??  (no wire nuts, thank you) Your ideas appreciated.

 

Bill

Feather River Solar Electric

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