AC output other than grounded. I’m thinking 25’ or 50’ so I can also use with gas gennie if needed? Harbor freight has best price usually but I’m not sure about quality. I think I saw some not UL listed.
A normal extension cord rated for the expected load will do fine.
For those concerned about HB products not being UL listed i did some research.
HF products usually meet ETL standard. Basically in Europe they adopted the UL standards (US) so they didn’t have to spend the time or $$ creating their own standards. This is why the are accepted in US market, they adhere to UL standards.
My disclaimer : I found this info online so please do your own due diligence if you are not comfortable with the info obtained from internet sources. I had the question so I thought others might as well.