Complex sentence: Seasonal thermal energy storage stores heat deep in the ground via a cluster of boreholes, the Drake Landing Solar Community in Alberta, Canada has achieved a 97% solar fraction for year' round heating, with solar collectors on the garage roofs as the heat source.
Split into simpler sentences: Seasonal thermal energy storage (STES) stores heat deep in the ground via a cluster of boreholes. The Drake Landing Solar Community in Alberta, Canada has achieved a 97% solar fraction for year-round heating, with solar collectors on the garage roofs as the heat source.