[RE-wrenches] 12K Sol-Ark

[Chris Sparadeo]

The Sol-Ark 12K falls on its face with 120v inductive loads. It’s an
imbalance issue, but really caused by the lack of a transformer. Sol-Ark
has stated that the 12K unit tops out at 2.5 HP. I have had luck installing
autotransformers as well. The Outback PSX240 was my go to, but it looks
like price of that has doubled in the past few years. Victron makes a 100A
transformer for a fraction of the cost.

It seems like this issue has been resolved in the Sol-Ark 15K design, and I
have yet to run into the same trouble.

On Tue, Oct 7, 2025 at 1:25 PM david quattro via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Hi Amanda,  Not an answer we like, but perhaps the most practical:
> *OutBack Power FW-X240 FLEXware Autotransformer*
> FW-X240
> I bought this autoformer through StellaVolta. There may be cheaper options.
> Through small claims, you could try to force SolArk to reimburse you for
> the autoformer and the labor to install.
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