We designed the Apex and Inergy solar panel systems to be totally plug-and-play and easy to use. Because we used high-capacity keyed EC8 connectors, you can simply plug your panels together and start charging—no diagrams, no worrying about wiring configurations.EC8 connectors are compact, require no tools to disconnect, are rated to handle six times the current demanded by the maximum charge input and are simply the safest connector available. EC8 connectors are keyed to prevent misalignment and are engineered to reduce excess heat.