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Software Release Notes - SolarEdge Designer

Latest Release: September 2026

Easier, Faster Utility Rates Configuration

The Utility Rates window has moved from the Consumption tab to its own standalone 'Utility Rate' tab located in the left menu, making it easier to locate and improving the overall project design flow.

Users can now select import and export rates in one place, without moving between tabs, for faster energy cost configuration.

All existing rate options and behavior remain the same as before.

Designer’s new standalone Utility Rate tab showing the Energy Cost screen, with import and export rate selection in one place

Report Toggle - Battery Only / PV Only / Full System

A new switch on the Designer Report lets you view financial values for battery only, PV only, or the full system. This makes it easier to clearly present the standalone value of adding a battery to a customer - especially for battery-only simulations on site expansions.

Designer Report with the new ‘Show financial values for’ switch set to Battery Only, alongside Full System and PV Only

Storage Recommendations - Improved Battery Sizing

Battery Recommendation – Time-of-Use Optimization table in Designer, listing battery options with the right-sized option selected

We’ve improved how battery options are prioritized, helping users find the most suitable configurations more easily e.g. ensuring right-sized options are prioritized over oversized ones based on your site's actual daily consumption.

Stringing Improvements

  • Auto-stringing: Fewer extension-cable errors (mostly 2:1 Power Optimizers), existing valid strings stay untouched
  • Manual stringing: Much faster on large sites - smoother dragging, connecting, and editing, with consistent speed even on heavy layouts

Designer stringing view of a large site layout with five inverters and the stringing tools open

Annual Demand Charges

Added support for an annual billing period for demand charges, mainly relevant for commercial solar projects in Germany. Users can now choose whether peak demand is assessed monthly or annually.

Demand Charge settings in Designer with the Peak Demand Period dropdown open, showing Monthly and Annually options

 

Previous Releases

    April 2026

    SolarEdge Designer: April 2026 Release

    New Residential Storage Tab

     

    This new tab lets users compare different battery setups in one place, saving time, improving clarity, and making decisions easier.

    Designer’s new Residential Storage tab with the Storage & Battery Recommendation table comparing battery options

    Edit an Uploaded Consumption Profile

    Users who upload custom consumption profiles can now edit them directly in Designer - adjusting monthly/yearly values without needing to re-upload a file from scratch.

    Consumption Profile screen in Designer showing an uploaded profile’s daily consumption chart, with the Edit Profile button highlighted
     

    Power Optimizer Input Power Clipping


    Designer now models Power Optimizer input power clipping loss in the energy simulation, improving yield accuracy for systems where module output exceeds the Power Optimizer's input limit.

    Optimizer Datasheet window in Designer for the S1000 Power Optimizer, listing its input and output DC limits

    AC Coupled Inverter Efficiency Loss in System Losses

    The System Losses diagram and report CSV now include AC Coupled inverter efficiency loss as a separate line item, giving a more complete picture of system yield.

    System Loss Diagram in Designer’s report with the ‘AC-coupled inverter loss’ line item highlighted

    February 2026

    SolarEdge Designer: February 2026 Release

    CSS-OD: Faster Loading + Increased Site Limit

     

    • Simulation limit raised from 1.2 MWh to 4 MWh, to support the CSS-OD 197 limits
    • General performance improvements for large storage systems

    Storage Capacity range slider in Designer set from 2,544 kWh to 4,000 kWh, with a Reset button

    Min Power Optimizer Power: Warning Instead of Error

    • Reduced overly strict minimum-power checks that previously rejected valid designs
    • Enables more flexible layouts for projects with mixed module sizes (e.g., facade systems)
    • Still prevents designs that would cause significant efficiency loss