Can Tesla help rebuild Puerto Rico's power grid?

Tesla (maker of electric cars) wants to help Puerto Rico rebuild their power grid. The hurricane destroyed most of the power grid, and in some areas, 100% of people were out of power for 2 or more weeks.

Tesla wants to help build a new solar power grid by storing power in giant battery banks, and distributing that power over power lines. This would be a networked design so there would be solar collectors and battery banks in several different cities. The PR power company was on the verge of bankruptcy when the hurricane hit so the power infrastructure was already poor, damaged, and need of repair at best.

Tesla has already sent hundreds of Powerwalls to help people, but those need electricity to recharge.

Sources
Youtube video.