[RE-wrenches] AC coupled grid tie only inverter

[Dave Tedeyan via RE-wrenches]

Hi All,

I've got someone who wants to tie their off-grid system with a Magnum
inverter (which I think is a 4024 PAE inverter) to the grid. Since the
Magnum inverter cannot be grid tied, I was wondering if there is some kind
of simple grid tie inverter that can be the grid interface, while keeping
the existing system in tact.

Otherwise, I see two paths here. The less expensive path would be to ditch
the batteries and connect the panels to a grid tie inverter. Otherwise it
seems that we will need to get another battery based inverter that is meant
to be grid connected to replace the Magnum.

Cheers,
Dave

-- 
[image: Logo] 
Dave Tedeyan, P.E.
Owner | Sungineer Solar
p: he | him | his
a: 1653 Slaterville Rd. | Ithaca, NY 14850
w: www.sungineersolar.com 
c: (607) 288-2898
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Re: [RE-wrenches] AC coupled grid tie only inverter

[Drake Chamberlin via RE-wrenches]

The grid tie inverter can sell through the Magnum relay. When the grid
goes down, it will feed the batteries. 

Drake Chamberlin 

Athens Electric LLC 

Ohio Electrical Contractor's License 44810 

CO Master Electrician's License 4526 


NABCEP Certified PV Installation Professional

---

On 2022-10-07 11:42, Dave Tedeyan via RE-wrenches wrote:

Hi All,  

I've got someone who wants to tie their off-grid system with a Magnum inverter (which I think is a 4024 PAE inverter) to the grid. Since the Magnum inverter cannot be grid tied, I was wondering if there is some kind of simple grid tie inverter that can be the grid interface, while keeping the existing system in tact.  

Otherwise, I see two paths here. The less expensive path would be to ditch the batteries and connect the panels to a grid tie inverter. Otherwise it seems that we will need to get another battery based inverter that is meant to be grid connected to replace the Magnum. 

Cheers, 
Dave

--

[1]

Dave Tedeyan, P.E.
Owner | Sungineer Solar

p: he | him | his
a: 1653 Slaterville Rd. | Ithaca, NY 14850
w: www.sungineersolar.com [2]
c: (607) 288-2898 


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Links:
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[2] http://www.sungineersolar.com/___
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Re: [RE-wrenches] Butt End Connector Warning

[Nick A Lucchese via RE-wrenches]

Are you just speaking of a galvanic corrosion chart John?

See here. 

Happy Friday everyone, Nick



> On Oct 6, 2022, at 12:51 PM, John via RE-wrenches 
>  wrote:
> 
> There used to be a chart – supplied years ago – that listed all the metals 
> and showed what was compatible – or not compatible with different metals.
> Sadly I can’t seem to find it, but one of the older guys might still have a 
> copy of that chart.
> Cheers – John Veix, N.Z.
>  
> From: RE-wrenches  > On Behalf Of Christopher 
> Warfel via RE-wrenches
> Sent: Friday, 7 October 2022 2:42 am
> To: re-wrenches@lists.re-wrenches.org 
> 
> Cc: Christopher Warfel  >
> Subject: Re: [RE-wrenches] Butt End Connector Warning
>  
> You cannot use them with Al. The connection will disintegrate over time. I 
> have pictures somewhere of mismatching rail bonding connectors that were gone 
> in a year. Chris  
> On 10/6/2022 9:32 AM, Drake Chamberlin via RE-wrenches wrote:
>> Our electrical supplier seamlessly transitioned from crimp on butt end 
>> connectors, that were listed for CU and AL, to unmarked ones that were 
>> approved for copper only. 
>> 
>> I became concerned since there was no marking. Calling two electrical 
>> suppliers, the guys at the counter had to look up the device to learn that 
>> they were listed for copper only. Talking to one of the counter guys, he 
>> agreed that electricians were probably using these for aluminum. 
>> 
>> Since the barrels will be insulated, it is not likely that inspectors will 
>> see them. The connectors are made of coated copper. I wonder how much of a 
>> problem this will be. 
>> 
>> Drake 
>> 
>> 
>> 
>> 
>> 
> -- 
>  Christopher Warfel
>  ENTECH Engineering, Inc.
> PO Box 871, Block Island, RI 02807
> 401-466-8978
>  
> 
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Re: [RE-wrenches] AC coupled grid tie only inverter

[Dave Tedeyan via RE-wrenches]

Hi Drake,
Just to make sure I understand you correctly, I could tie in a new grid tie
inverter on the load side of the Magnum inverter. Then when the grid is up,
the power will be able to backfeed through the MMP175-30D panel to the AC
input (which will get rewired to the grid). And when the grid is down, the
Magnum inverter will be able to take the power from the grid tie inverter
on the load side of the Magnum inverter to charge the batteries?
Cheers,
Dave

On Fri, Oct 7, 2022 at 1:00 PM Drake Chamberlin via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:

> The grid tie inverter can sell through the Magnum relay. When the grid
> goes down, it will feed the batteries.
>
>
>
> Drake Chamberlin
>
> Athens Electric LLC
>
> Ohio Electrical Contractor’s License 44810
>
> CO Master Electrician’s License 4526
>
> NABCEP Certified PV Installation Professional
> ---
>
>
>
> On 2022-10-07 11:42, Dave Tedeyan via RE-wrenches wrote:
>
> Hi All,
>
> I've got someone who wants to tie their off-grid system with a Magnum
> inverter (which I think is a 4024 PAE inverter) to the grid. Since the
> Magnum inverter cannot be grid tied, I was wondering if there is some kind
> of simple grid tie inverter that can be the grid interface, while keeping
> the existing system in tact.
>
> Otherwise, I see two paths here. The less expensive path would be to ditch
> the batteries and connect the panels to a grid tie inverter. Otherwise it
> seems that we will need to get another battery based inverter that is meant
> to be grid connected to replace the Magnum.
>
> Cheers,
> Dave
>
> --
>
> [image: Logo] 
> Dave Tedeyan, P.E.
> Owner | Sungineer Solar
> p: he | him | his
> a: 1653 Slaterville Rd. | Ithaca, NY 14850
> w: www.sungineersolar.com 
> c: (607) 288-2898
>
> ___
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-- 
[image: Logo] 
Dave Tedeyan, P.E.
Owner | Sungineer Solar
p: he | him | his
a: 1653 Slaterville Rd. | Ithaca, NY 14850
w: www.sungineersolar.com 
c: (607) 288-2898
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