I don't have documentation for the evolution. Maybe this will help.But how about the evo 2.0?
Generac industrial tech here.
Is it an air cooled or liquid cooled? Assuming it’s a new, air cooled (Evolution 2.0 controller) make sure T1 has 120V at the generator. On air cooled’s they use the main power neutral as the return for battery charging.
Something I found on Reddit.