About: http://webisa.webdatacommons.org/305022546

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The device in between them is a controller, which keeps the sun from overcharging the batteries by day and also prevents voltage draining off at night.
http://www.w3.org/ns/prov#wasQuotedFrom	olpcnews.com