Hemsworth and wife Elsa Pataky bought the 4.2 hectare property south of Byron Bay for A$7 million in 2014, and demolished the existing eight-bedroom Balinese-style resort so they could build their dream home in its place.
The couple's $20 million hilltop home is finally nearing completion after several years of construction.
"We just put a big roof for the solar. That's it. That's the only thing that we wanted is to have solar," Pataky said in a radio interview last month.
The inclusion of the solar panels comes as no surprise, given the family have long been environmental advocates, recently taking part in the Byron Bay Climate Strike 4 School event.
The controversial dwelling, which has been branded "obscene, greedy, flashy and vulgar" by irate locals, features six bedrooms, a gym, steam room, media room, games room, vast outdoor living and play areas and a 50-metre rooftop infinity pool rumoured to have cost A$400,000 alone.
It has even been blamed for pushing the median property price in the area north of A$1.75 million.
Back in July, Hemsworth offered fans a first look inside the mansion, revealing a mural he had commissioned by artist Otis Hope Cary to fill a "big empty wall" in the home.
"In this piece, Otis utilises traditional symbols and imagery in grandiose scale in a display of contemporary practice and thought," Hemsworth said in an Instagram post showcasing the massive wall art: