The International Space Station (ISS) has completed installing its solar panel power grid today with the deployment of its final solar array. The solar panel arrays which were installed during a space walk yesterday, are the last piece in the ISS energy grid that has been almost 10 years in the making.

The solar panels are 35 meters long and extend 73 meters from end to end, will increase power to the ISS by 25 percent. The station has three other sets of solar arrays that generate enough electricity to power 42 average homes.

This increase in energy on the ISS will allow for twice as many crew members and significantly more scientific experiments.