In addition to the fancy Orbi, just get some cheap plain vanilla wifi range extender and have the Generac talk to that.

https://www.amazon.com/D-Link-Wireless-Gigabit-Extender-DAP-1650/dp/B0754MWF8X?tag=p00935-20&ascsubtag=07cNZRa3crBwdYxTahipAOl