[RE-wrenches] Low Frequency transformer off-grid inverter options

[Christopher Warfel]

Have they already installed soft starts on these motors?  Chris

On 1/13/2023 1:41 PM, Starlight via RE-wrenches wrote:
> Mac,
>
> What was the lowest voltage measured at inverter battery terminals 
> during the inrush measurement?
>
> Larry Crutcher
> Starlight Solar Power Systems
>
>
>
> On Jan 13, 2023, at 11:33 AM, Mac Lewis via RE-wrenches 
> <re-wrenches at lists.re-wrenches.org> wrote:
>
> Hello Wrenches,
>
> I have a new client that has ran a pretty decent wood shop for about 
> 10 years on a Magnum 4448. He's got some large loads, planers, saws, 
> compressors vacuums etc.  They are really nice, heavy duty pieces of 
> equipment.  Amazingly, the Magnum has been able to start these loads 
> for the most part for 10 years, but he has reported that it has gotten 
> worse lately (could be a load issue), brown outs, dimming etc
>
> He wants to upgrade the system, get remote monitoring etc.  I tried a 
> test with a Sol-Ark 12, and it won't start these large motor loads.  I 
> was a little surprised by that but I know they aren't as good as the 
> low freq transformer based inverters at these surges.
>
> I confirmed that its not just an overload from imbalance because the 
> 240V loads will also overload it.  I got an inrush measurement of 
> 48.5A Ac @240 (but it didn't start the load before Sol-Ark would shut 
> off)
>
> What are my options?
> Schneider XW Pro 6848
> Outback Radian 8048 (Is this a low freq device?)
> Sunny Islands are beasts but weird to work with and not user friendly
>
> Any others I should consider?  He does have some significant 120 only 
> loads so I don't think the Outback vfxr are a good choice.
>
> Is it as simple as saying if the Magnum can start this load, the 
> Radian should?
>
> I appreciate your input!
>
> --
> Mac Lewis
>
> *
>
> "Yo solo sé que no sé nada." -Sócrates
>
> *
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-- 
             Christopher Warfel
                      ENTECH Engineering, Inc.
PO Box 871, Block Island, RI 02807
                                 401-466-8978
<http://entech-engineering.com>

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