Solar PV optimiser features

• Type: module-level power electronics optimiser (MLPE)
• Optimisation: individual per panel — independent of the rest of the string
• Safety: automatic shutdown on overtemperature
• Monitoring: accurate fault detection per module
• Compatibility: broad — works with most inverters and PV modules on the market
• Requirement: mandatory installation of the BFS-ESW11-K emergency switch

What is a solar PV optimiser and what is it used for?

A solar PV optimiser is a DC-DC converter that connects to each solar panel individually. Its main function is to ensure that every panel always operates at its maximum power point (MPPT), regardless of the conditions of adjacent panels.

Without a solar PV optimiser, if one panel in the string is shaded or dirty, it drags down the output of all the other panels connected in series. With the optimiser, each panel works independently, eliminating the drag effect and maximising the system’s total output.

Benefits of the solar PV optimiser

• Higher output in installations with shading: eliminates the drag effect between panels
• Individual optimisation: each panel works at its own maximum power point
• Module-level monitoring: identifies exactly which panel is faulty or underperforming
• Enhanced safety: automatic shutdown on overtemperature
• Design flexibility: allows strings with panels at different orientations or tilts
• Compatible with multiple inverters: doesn’t restrict your choice of inverter

When is a solar PV optimiser recommended?

A solar PV optimiser is especially recommended in the following cases:

• Roofs with partial shading from chimneys, antennas, trees or nearby buildings
• Installations with panels at different orientations or tilts
• Complex roofs where it’s not possible to install all panels at the same orientation
• Installations where individual monitoring of each panel matters
• Projects that require maximum safety against overtemperature events

Solar PV optimiser vs microinverter — which one to choose?

• Solar PV optimiser (this product): works alongside a central inverter, optimises at DC level, lower cost per panel, centralised maintenance at the inverter
• Microinverter: converts to AC at each panel, no central inverter required, greater flexibility but higher cost and more maintenance points

For most residential installations, a solar PV optimiser combined with a quality hybrid inverter offers the best balance between performance, cost and simplicity.

Automatic safety shutdown

The solar PV optimiser includes an automatic shutdown system on overtemperature that safely disconnects the panel when an abnormal temperature is detected. This protects both the installation and the building against risk situations, meeting the strictest safety requirements.

The use of the Bexie solar PV optimiser requires the installation of the BFS-ESW11-K emergency push-button switch to ensure complete system safety.

Accurate module-level monitoring

With the solar PV optimiser, the Bexie Monitoring platform can display the output of each individual panel in real time, allowing you to:

• Identify exactly which panel is producing less
• Detect shading, dirt or degradation in specific modules
• Optimise maintenance — only clean or inspect the panels that actually need it
• Verify the expected performance of every module