Tigo TS4AO Module AddOn Rapid Shutdown, Optimization, 1500V UL1000TUV, 1.2M Cable, MC4 Genuine Connectors, Part No. 4510025732 Optimization is a Flex MLPE function available as an addon unit (TS4AO). Design using unequal string lengths, mixed orientations, or areas of mismatch. Install in shaded areas with a reduced setback ratio. Optimize only where needed with selective deployment. The TS4AO can be deployed without communication and without monitoring accessories. NEC 2014, 2017, 2020 690.12 rapid shutdown compliant Shade and mismatch tolerance Maximized roof usage Greater design flexibility Enhanced energy yield Plus all the benefits of Safety and Monitoring when used with CCA Kit with TAP