SolarEdge released residential firmware bundle 4.20.32 for its home inverters, adding G100 compliance for the Home EV Charger in the UK market alongside changes to Home Network and Zigbee mixing and faster Power Optimizer detection1. The release appears in the maker's list of residential firmware versions, which also carries later bundles including 4.20.36, 4.21.23, 4.22.39, 4.22.44, 4.23.27, 4.23.36 and 4.24.91.
On the charger, the release notes state that the Home EV Charger "is now fully G100 compliant for the UK market, derating itself according to the site limits that are configured", with a footnote that it is "approved only for 1ph systems"1. The same notes record that "the ability to move the system from G.100 Restricted/Locked mode to Normal operational mode was add to the Monitoring Web system"1. G100 is the connection standard governing export limitation for small-scale generation, and the notes for a later bundle, 4.23.36, record a related fix: "G100, In some cases, the export limit control was not activated. If the system is in Lock mode, it is recommended to unlock it before performing the upgrade"1.
The bundle also covers the Home Load Controller, which "can now be configured as SG-Ready controller for heat-pumps, enabling increased excess PV utilization for heating and cooling"1. On optimizers, the notes say "The following inverters now support S650A optimizers for PV modules of up-to 650W"1. Home Network and Zigbee mixing is listed in the release summary, and the notes for the later 4.24.9 bundle list separate firmware for the Home Hot Water Controller on Home Network (CPU 1.0.72) and on Zigbee (3.10044.0)1.
"Home EV Charger is now fully G100 compliant for the UK market, derating itself according to the site limits that are configured. \* approved only for 1ph systems"
Later bundles in the same list carry changes that affect how a home's stored energy is used. Bundle 4.23.36 added a setting letting the owner choose whether the EV charger can draw from the home battery; if disabled, "the home battery will be blocked from discharging energy to the EV, Home or other loads"1. The same notes record that the SolarEdge Home Battery 48V usable capacity rose to "4.85kWh (instead of previously 4.6kWh)" per module for sites with a Backup Interface commissioned after January 2025, and that "Backup Reserve minimum value was 5% - now it's 0% again"1. A known issue in that bundle is that the 48V battery model shown in the mySolarEdge app and monitoring was not updated to match the increased usable capacity for existing installations, with a workaround of removing and adding back the batteries1.
| Item | Detail given |
|---|---|
| Bundle | 4.20.32 |
| UK charger change | Home EV Charger fully G100 compliant, derating to configured site limits; single phase only |
| Other changes | Home Network/Zigbee mixing; faster Power Optimizer detection; S650A optimizer support for modules up to 650W |
| Later bundle noted | 4.24.9, described as the latest residential bundle release |
Why it matters for households
G100 compliance determines whether a home's inverter and charger hold their output within the export limit agreed for the connection, so a charger that derates itself to the configured site limit matters to any household whose charger and solar share one connection. The ability to move a system out of G100 Restricted or Locked mode from the monitoring web system affects homes whose export control has been left locked. Letting a household block the home battery from discharging into the car, added in a later bundle, changes how much stored energy stays available for the house. The 48V battery capacity change and the return of a 0% backup reserve minimum affect how much of a battery can be held back for outages, though the app display issue means some existing owners may not see the higher figure. Firmware version and support life are covered in the site's guide to firmware updates, app support and product lifespan, with device-specific detail under SolarEdge inverters and power optimisers and the wider manufacturers section.
What happens next
No dated next steps are given for bundle 4.20.32. The release notes list later bundles up to 4.24.9, described as the latest residential bundle release, and note that the increased 48V usable capacity applies to sites with a Backup Interface commissioned after January 20251.
Sources1 cited
- Firmware Updates for Residential Inverters | SolarEdge, solaredge.com