[RE-wrenches] 500V "Crowbar"

[david quattro]

Travis, sounds like you are not able to re-string the array to conform to
500V max?

On Mon, Jun 16, 2025 at 1:42 PM Travis Knipple via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Hi all,
>
> This is a repeated (rephrased) version of a previous question, but I've
> hit upon a new application.
> I'm looking to retrofit a system from existing SMA Sunny Boy inverters to
> work with an ESS System.
> My PV Array (~900' from the inverters) is 600V Voc, and the strings are
> combined at the Array, so Imp is 24A, Isc is 32A.
> Also, important to note is that 1 of my SB7000 inverters is non functional.
>
> So, my options are:
> (A) A 500V "Crowbar" or SRC type circuit to limit my Voc, and allow me to
> take the array directly to a single MPPT port on a Sol-ark Inverter
> Or, use AC-Coupling to the Sol-Ark, then I can...
> (B) A new PV Inverter that can handle 600V, 32A (Isc) on a single MPPT Port
> (C) A replacement SB7000
> (D) Re-pull my strings of wires to something like a Solis PV Inverter
>
> Does anyone know of either:
> (A) a Voc limiter?
> (B) A PV Inverter with a single MPPT input that can handle 600V, 24A
> (Imp), 32A (Isc)
> or
> (C) A source for a replacement SB7000US
>
> --
> Travis Knipple
> Senior Engineer
> Hudson Solar Solutions LLC
> Rhinebeck, NY 12572
> 518-539-8040 x408 | travis at hudsonsolarsolutions.com
>
> PVIP# PV-111821-013612
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