[RE-wrenches] Sunny Island AC-Coupled system integration with Fortress E-Vault

[Chris Sparadeo]

Hi William,

That’s an interesting idea to have close loop comms with two separate
manufacturers at the same time. In theory I think this could work,  but
unfortunately, I don’t think SMA and Schneider share the same protocol #
for the eVault. I believe SMA uses protocol #2 and Schneider uses #5.

Kindly,

Chris

On Tue, Oct 24, 2023 at 10:40 AM MDElectricSolar via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> I would tear all the sunny boys and sunny islands out and install two 15
> kW Sol-Arks,  problem solved. DC coupled. I've done this several times now
> for existing clients (mostly connected to the grid) but it is so much
> cleaner and more compact and effective.
>
> Michael D Nelson
> MD Electric & Solar, Inc.
> 707-684-0064 mobile
> 707-884-1862 office
> www.mdelectricsolar.com
> www.facebook.com/mdelectricandsolar
>
>
> On Oct 24, 2023, at 7:31 AM, William Miller via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
> 
>
> Friends:
>
>
>
> This situation is as yet unresolved.  It is complicated enough I created a web
> page
> <https://millersolar.com/MillerSolar/case_studies/36_SIFortress/36_SunnyIslandFortressIntegration.html>
> to describe the scenario so I did not have to explain it over and over.  I
> submitted this to Fortress tech support.  They said they had likely not
> tested the Fortress compatibility with SI in an AC-Coupled system.
>
>
>
> While Fortress technicians and/or engineers ponder the situation I am
> brainstorming solutions.  One idea is to convert to a DC coupled system.
> DC Charge controllers will have intrinsically better voltage control.  The
> charge controller most likely suitable is the Schneider 600 volt 100 amp
> unit.  I would need two of them.  It is compatible with the existing string
> wiring.  In researching it many questions came up about that product’s
> suitability.  There is an integration guide for a Schneider system and
> Fortress but this would be a mixed system of Schneider and SMA.  Would I be
> able to apply closed loop communication to both systems?  Could the charge
> controllers work in open loop?  Has anyone tried anything like this?
>
>
>
> I will keep you apprised.
>
>
>
> William Miller
>
>
>
> Miller Solar
>
> 17395 Oak Road, Atascadero, CA 93422
>
> 805-438-5600
>
> www.millersolar.com
>
> CA Lic. 773985
>
>
>
>
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