[RE-wrenches] Sol-Ark 15K AC Output

[Jerry Shafer]

Wrenches, Jason
I have always either with outback and with solark have always connected
each unit with a distribution panel with breakers regardless of what's in
the inverter package. This same goes for the gen set connections with
proper breakers so not to have to over size the wires.
I have connected to either the gen set input or the grid input both will
work and both can be used to charge the batteries.
Question l do alot of gen set integration and breakers on the genset may
not reflect its actual design output and l have seen multiple times
overloading the genset due to the incorrect math. Use a power factor of .8
of the gen set rating then 75% of that is safe continues operating load.
Now some may argue with this but when l take a 150 kW  genny for a 4 hr
load bank test that's the math that's used.

Your batteries should also be independently fuse or breaker protected
outside of the battery such as a midnite battery combiner breaker cabinet,
required for any more than two banks. I do this with FLA's blue planet and
fortress regardless of the internal breaker supplied.
Fun times

On Tue, Mar 26, 2024, 2:27 PM Jason Szumlanski via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> I am going to have a quad-stack of Sol-Ark 15K for an off-grid 120/240V
> system with a 150A generator. I know the max real power is 62.5A each
> inverter including battery and PV. That would be 62.5A x 4 = 250A total. I
> intend to connect the output of the 4 inverters together with a 5-port
> Polaris tap, with the output of the Polaris Tap going to a 400A main lug
> only panelboard.
>
> My question revolves around the 200A passthrough capability for the
> generator, which is 150A max output and would be connected to the Grid
> input on each inverter. Since each inverter would need to handle the full
> pass-through current, that would require minimum 150A conductors on the
> input side of each inverter. I am under the impression that the inverters
> can supplement the "grid" or generator in this case if the current exceeds
> the available input. That means the inverter would have 150A of input plus
> 62.5A  of inverter power for a total of 212.5A. But there is a 200A load
> OCPD, so I could size the load conductors from each inverter for 200A.
>
> Obviously the 4 inverters can only pass through 150A from the generator in
> total, which would probably be split among them, but could go through a
> single unit if the rest fail.
>
> Now, is it possible for each inverter to output 62.5A each PLUS 150A of
> generator power spread across them for a total of 400A? That is important
> because I would need to size the combined output conductors for 400A if
> that is the case.
>
> I guess I'm not clear on how Sol-Ark 15K handles grid/generator
> assist/supplement. It does not seem to be documented clearly.
>
> Jason Szumlanski
> Florida Solar Design Group
>
>
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