[RE-wrenches] SW4024 compatibility question

[Mick Abraham]

I have an early vintage SW unit (which is overdue for retirement but refuses
to break...)

Those early models had to be physically removed from the wall to get the
cover off, so a chipset replacement was difficult. Then Series II came out
(which can be identified by the easier method for removing the cover).

There were additional revisions to the physical hardware when Series II came
out, and I've carried the notion that Series II was not backward compatible
to Series I.

Dave Katz' suggestion is something that I'm sure you'll want to pursue, but
I advise that all digits of the firmware revision should match...and that
both inverters should be Series I or II, not mixed.

I have an extra chipset that I never installed...owing to the difficult
replacement process...so we could compare notes further if you wish.

Jolliness,

Mick Abraham, Proprietor
www.abrahamsolar.com

Voice: 970-731-4675


On Fri, Oct 30, 2009 at 7:05 PM, Allan Sindelar <
allan at positiveenergysolar.com> wrote:

>  Esteemed Wrenches:
>
> Wrench esoterica time… another contest like Mick’s to win the chance to
> take time off…
>
>
>
> A customer has a late-2005 SW4024 with Rev. 4.30 firmware. He needs to add
> a second inverter for series stacking to increase output to run a big well
> pump. We have an early SW4024 with Rev 1.0 firmware, and we have both Rev.
> 4.01 and 4.10 firmware chipsets in our parts archives. Are the two inverters
> compatible if series-stacked with a firmware upgrade?
>
>
>
> Thank you.
>
>
>
> Allan Sindelar
>
> Allan at positiveenergysolar.com
>
> NABCEP Certified Photovoltaic Installer
>
> EE98J Journeyman Electrician
>
> *Positive Energy, Inc.*
>
> 3201 Calle Marie
>
> Santa Fe, New Mexico 87507
>
> 505 424-1112
>
> www.PositiveEnergySolar.com <http://www.positiveenergysolar.com/>
>
>
>
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