[2] Originally owned by Genesis Energy, in October 2024 the farm was sold to NZ Windfarms.

33 kV lines from stage 2 take electricity 24 kilometres (15 mi) to Martinborough to supply the town.

During peak demand, electricity generated by Hau Nui is used by Martinborough and the eastern South Wairarapa district.

During off-peak, Hau Nui electricity can supply the entire South Wairarapa district via 33 kV lines connecting Martinborough with Featherston, Greytown, and Pirinoa.

If local demand is low, some electricity may be exported to the national grid through Transpower's Greytown substation.