Tesla has announced that their simpler solar panels are nearly entirely powering the island of Ta’u in American Samoa.

SolarCity developed a microgrid with 1.4 megawatts of solar generation capacity — enough to power nearly 100% of the island, according to a SolarCity blog posted on Tuesday seen by latest solar news web site. The microgrid is enabled by 60 Tesla Powerpacks, the company’s large commercial battery, which can store solar energy at night.