Can we get a link to the spec sheet please?
EDIT: I believe this is it on Growatt website:
ATS-US | ESS Accessories | Growatt
www.ginverter.com
Signature Solar News Release:
Growatt Split Phase TransformerSignature Solar now offers the latest US Split Phase Auto Transformer by Growatt. This autotransformer takes Single Phase 240Vac (L/N) electricity output and creates true Split Phase 120Vac/120Vac (L/L/N). This addition to our line sheet increases safety and ease...
signaturesolar.com
guide:
So I think its 240V in
And max on one leg out at 120v is 3000W (unbalanced power)