What are the NEC Sections That Have to do with Maximum String Length? Article 690.7 in the 2011 NEC: Related articles Application: Module-level Disconnect for Safest Solar What happens if there's a power outage? What is the Power Consumption of a CCA and TAP? What is Tigo Optimizer's CEC Weighted Efficiency? Uneven Strings Comments 0 comments Please sign in to leave a comment.