Brand New in factory sealed boxes if you buy (10) or individually shipped.
SolarEdge Power Optimizer 400W, Add-On Box for 60 & 72 cell modules. The SolarEdge power optimizer is connected to each module to maximize energy throughput with constant tracking of the Maximum Power Point. The power optimizers monitor the performance of each module and communicate performance data to the SolarEdge monitoring portal for enhanced, cost-effective maintenance. When working with SolarEdge inverters, power optimizers automatically maintain a fixed string voltage, allowing optimal efficiency of the SolarEdge inverter.