Maximise Output from Every Panel

The SolarEdge S440 Power Optimizer is a smart solution for boosting solar system performance at the panel level. Designed for UK residential PV installations, it minimises losses from shading, orientation, or manufacturing differences, ensuring every panel delivers its full potential.

Built for Seamless Integration

Fully compatible with SolarEdge single-phase and three-phase inverters, the S440 simplifies system design and allows for flexible string lengths. Ideal for rooftops with varying pitches or orientations commonly found in the UK housing market.

• Rated input DC power: 440 W (490 W for post-April 2024 installs)
• MPPT voltage range: 8–60 VDC
• Maximum efficiency: 99.5%

Safer Installations with Module-Level Shutdown

The SolarEdge S440 Power Optimizer includes automatic module-level voltage shutdown, improving installer and firefighter safety. It also detects abnormal connector behaviour, supporting compliance with UK safety standards.

Simple, Time-Saving Installation

A compact, lightweight design with a single-bolt mounting bracket and integrated cable management makes the S440 quick to install. It uses standard MC4 connectors and short cables for tidy, efficient routing.

Engineered for UK Weather

With a wide operating temperature range from -40°C to +85°C and IP68 protection, the S440 is built to perform year-round in the UK's variable climate. A 25-year warranty gives you long-term confidence.