Solar Edge S440 Power Optimizer

The SolarEdge S440 is a module-level power optimiser for residential systems, designed to work with SolarEdge residential inverters. It optimises power at module level, reducing losses from module mismatch, from manufacturing tolerance to partial shading. For installations after 1 April 2024 SolarEdge rates it at 490 W of input power, with an MPPT operating range of 8 to 60 V and a maximum efficiency of 99.5%. Module-level voltage shutdown protects installers and firefighters, and the optimiser can detect abnormal PV connector behaviour, depending on inverter model and firmware. It mounts with a single bolt on a flat bracket, has a 0.1 m input lead and MC4 connectors, is compatible with bifacial modules, and is IP68 rated. S-series and P-series optimisers must not be mixed in the same string in new installations. 25-year warranty.