Welcome to Panola-Harrison Electric Cooperative. Panola-Harrison Electric Co-op was organized in 1937 and serves Harrison & Panola counties in Texas, and Caddo & Desoto parishes in Louisiana. Our mission is to serve our members with the "Highest Quality Service at the Most Economical Price". Press Release: You may pay your bill with a credit card at this web site, or by dialing 866-520-1211 or 903-935-4657. There is a $4.95 convenience fee for this service.