3 primary schools in Punggol start tapping on solar power as part of carbon-neutral push Toggle share menu Advertisement 3 primary schools in Punggol start tapping on solar power as part of carbon-neutral push Horizon Primary School (left), Compassvale Primary School (centre) and Edgefield Primary School have started tapping on solar energy. (Photos: Google Maps Street View) 01 Jun 2021 11:30AM) Share this content Bookmark SINGAPORE: Three primary schools in Punggol have begun tapping on electricity generated from solar panels as Singapore moves towards its target for at least 20 per cent of schools to be carbon-neutral by 2030. Rooftop solar systems were installed at Horizon Primary School, Compassvale Primary School and Edgefield Primary School at the end of April, said Sunseap Group on Tuesday (Jun 1).