The SolarEdge S440 power optimiser can now be used with photovoltaic modules rated up to 550 W, thanks to a new exemption applicable to installations carried out in Europe from 1 November 2026, subject to the specific technical conditions established by the manufacturer.
This update expands the compatibility of the S440 optimiser with the latest generation of high-power PV modules, providing greater flexibility in the design of residential photovoltaic systems.
SolarEdge S440: compatibility requirements for 550 W PV modules
The new exemption extends the possible combinations of the SolarEdge S440 power optimiser and PV modules, depending on the inverter model installed.
The approved configurations are:
| SolarEdge inverter | Maximum PV module power | Maximum Voc | Maximum Isc |
| Home Hub and Nexis | 550 W | 60 V | 16.5 A |
| Home Wave | 550 W | 60 V | 15 A |
For configurations using SolarEdge Home Hub and Nexis inverters, the continuous operating current is limited to 15 A.
To ensure that the exemption applies and that the relevant warranty conditions are met, the following requirements must also be satisfied:
- The PV system must be connected to the SolarEdge monitoring platform.
- All other technical specifications and installation guidelines provided by the manufacturer must be followed.
- The system configuration must be verified against the electrical characteristics of the selected PV modules.
It is important to remember that module rated power is not the only parameter to consider. Open-circuit voltage (Voc), short-circuit current (Isc) and operating conditions must also comply with the limits specified for each configuration.
What does this mean for installers and system designers?
Extending compatibility to 550 W provides greater flexibility when selecting photovoltaic modules to be paired with the SolarEdge S440 optimiser.
For solar professionals, this update offers several advantages:
- A wider choice of high-power PV modules.
- Greater flexibility in using the S440 across residential PV installations.
- Easier component selection during system design, while ensuring compliance with electrical requirements.
- Access to the module-level optimisation and monitoring features offered by the SolarEdge ecosystem.
SolarEdge power optimiser range
SolarEdge offers a comprehensive range of power optimisers designed for different photovoltaic applications, from residential installations to commercial and industrial (C&I) systems.
SolarEdge power optimisers enable energy production to be managed at individual module level or, for compatible models, across pairs of modules, helping to reduce losses caused by mismatch, shading and different operating conditions.
The product range includes:
- SolarEdge S440: A power optimiser designed for residential applications, now compatible with modules up to 550 W under the conditions specified in the new exemption.
- SolarEdge S500 and S500B: Solutions for higher-power PV modules, selected according to their electrical characteristics and inverter compatibility.
- SolarEdge S650B: A power optimiser designed for specific configurations using high-power photovoltaic modules.
- SolarEdge S-Series for C&I applications: Solutions developed for commercial and industrial photovoltaic installations, with technical characteristics and connection requirements tailored to different system configurations.
Selecting the right power optimiser requires careful consideration of module power and electrical specifications, SolarEdge inverter compatibility and string design requirements.
PV system design with SolarEdge Designer
SolarEdge Designer is the manufacturer’s dedicated design software, developed to support the correct configuration and sizing of photovoltaic systems.
The tool enables installers and system designers to configure PV installations, select compatible inverters and power optimisers, and verify key design requirements.
SolarEdge has announced that the S440 technical datasheet and Designer software will be updated to reflect the new compatibility conditions.
Until the updated documentation and software are available, installers and designers should refer to the manufacturer’s official exemption notice and verify that the selected configuration meets all applicable requirements.
SolarEdge power optimisers for residential and C&I photovoltaic systems
The SolarEdge power optimiser range provides photovoltaic professionals with solutions for module-level energy management and monitoring, supporting different system design requirements.
VP Solar distributes SolarEdge solutions, supporting installers, system designers and EPC contractors in selecting components for residential, commercial and industrial photovoltaic installations.
To explore the technical specifications of the available power optimisers and identify the most suitable solutions for your project, visit the VP Solar product catalogue.
SolarEdge S440 – S500 – S500B – S650B PV power optimizer
SolarEdge power optimizer additional solution to the module S series
- Specifically designed to work with SolarEdge inverters
- Superior efficiency (99.5%)
- 25 years warranty
- Available sizes: S440 – S500 – S500B – S650B
Datasheet
Fiche technique Français
Datenblatt Deutsch
Complete documentation
PV power optimization at the module level
- Specifically designed to work with SolarEdge residential inverters
- Detects abnormal PV connector behavior, preventing potential safety issues*
- Module-level voltage shutdown for installer and firefighter safety
- Superior efficiency (99.5%)
- Mitigates all types of module mismatch loss, from manufacturing tolerance to partial shading
- Faster installations with simplified cable management and easy assembly using a single bolt
- Flexible system design for maximum space utilization
- Compatible with bifacial PV modules
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