IQ Gateway software version 8.2.4386 supports grid-agnostic systems with IQ8 Series and IQ7 Series Microinverters along with IQ Battery 5P and IQ System Controller 3 INT.

Countries: India and South Africa

#	Feature	Description
1	IQ Battery 5P support along with IQ System Controller 3 INT	Supports grid-agnostic solar and storage systems with IQ8/IQ7 Series Microinverters, IQ System Controller 3 INT, and IQ Battery 5P.

Gateways supported: IQ Gateway within IQ System Controller 3 INT
Microinverters supported: IQ8 Series and IQ7 Series Microinverters
Batteries supported: IQ Battery 5P
System controllers supported: IQ System Controller 3 INT
Supported system configurations:
- Grid-agnostic solar and storage systems with IQ8 Series Microinverters, IQ System Controller 3 INT, and IQ Battery 5P.
- Grid-agnostic solar and storage systems with IQ7 Series Microinverters, IQ System Controller 3 INT, and IQ Battery 5P.

This release is being deployed via remote software upgrades for specified configurations.

IQ Gateway software release notes (8.2.4265)

November 22, 2024

IQ Gateway software version 8.2.4265, as part of factory-built gateways, supports grid-tied systems with IQ8 Series, IQ7 Series, and/or M Series Microinverters or third-party string inverters along with the IQ Battery 3T/10T, IQ Battery 5P, or AC Batteries.

Gateways supported: IQ Gateway Metered and IQ Gateway Standard

Countries: Albania, Austria, Australia, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, India, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Malaysia, Mauritius, Namibia, Netherlands, New Caledonia, New Zealand, Philippines, Poland, Romania, Slovakia, Slovenia, South Africa, Spain, Sweden, Switzerland, Thailand, Turkey, Great Britain, and Vietnam

#	Feature	Description
1	IQ Battery 5P support	The factory-built gateways will support grid-tied solar and storage systems with IQ8/IQ7 Series Microinverters or third-party string inverters and IQ Battery 5P in Belgium, France, Great Britain, Italy, Luxembourg, and Netherlands.
2	Dynamic tariff (DT) support	The factory-built gateways will support dynamic tariff configurations in Belgium, Germany, and Netherlands to optimize system behavior for maximum savings.
3	Discharge-to-grid (DTG) support	The factory-built gateways will support discharge-to-grid functionality in Germany and Great Britain to increase monetary benefit for homeowners by exporting excess energy to the grid at times with high export rates.

Microinverters supported: IQ8 Series, IQ7 Series, M Series, and compatible third-party string inverters
Batteries supported: IQ Battery 3T/10T, IQ Battery 5P, and AC Batteries
Supported system configurations:
- Belgium, France, Great Britain, Italy, Luxembourg, and Netherlands:
  - Grid-tied solar and storage systems with IQ8 Series Microinverters, IQ Gateway Metered, and IQ Battery 5P
  - Grid-tied solar and storage systems with IQ7 Series Microinverters, IQ Gateway Metered, and IQ Battery 5P
  - Grid-tied solar and storage systems with M Series Microinverters and/or IQ7 Series Microinverters, IQ Gateway Metered, and IQ Battery 5P
  - Grid-tied solar and storage systems with compatible third-party string inverters, IQ Gateway Metered, and IQ Battery 5P
- Austria, Switzerland, Germany, France, Belgium, Netherlands, Spain, Portugal, Denmark, Sweden, and Greece:
  - Grid-tied solar and storage systems with IQ8 Series Microinverters, IQ Gateway Metered, and IQ Battery 3T/10T
  - Grid-tied solar and storage systems with IQ7 Series Microinverters, IQ Gateway Metered, and IQ Battery 3T/10T
  - Grid-tied solar and storage systems with M Series Microinverters and/or IQ7 Series Microinverters, IQ Gateway Metered, and IQ Battery 3T/10T
  - Grid-tied solar and storage systems with compatible third-party string inverters, IQ Gateway Metered, and IQ Battery 3T/10T
- For all supported countries:
  - Grid-tied solar and storage systems with IQ8 Series Microinverters, IQ Gateway Metered, and AC Batteries
  - Grid-tied solar and storage systems with IQ7 Series Microinverters, IQ Gateway Metered, and AC Batteries
  - Grid-tied solar and storage systems with M Series Microinverters and/or IQ7 Series Microinverters, IQ Gateway Metered, and AC Batteries
  - Grid-tied solar and storage systems with compatible third-party string inverters, IQ Gateway Metered, and AC Batteries
  - Grid-tied Solar Only systems with IQ8 Series Microinverters and IQ Gateway Metered or IQ Gateway Standard
  - Grid-tied Solar Only systems with IQ7 Series Microinverters and IQ Gateway Metered or IQ Gateway Standard
  - Grid-tied Solar Only systems with M Series Microinverters and IQ Gateway Metered or IQ Gateway Standard

This release is being deployed via the factory for new gateways.

IQ Gateway software release notes (7.6.336)

December 8, 2023

IQ Gateway software version 7.6.336 supports IQ7 Series and M Series Microinverters along with IQ Battery 3T/10T and AC Battery for Germany, Belgium, Austria, France, Netherlands, and Switzerland.

Gateways supported: IQ Gateway Metered
Countries: Austria, Belgium, France, Germany, Netherlands, Switzerland
Microinverters supported: IQ7 Series, M Series, third-party string inverters
Batteries supported: IQ Battery 3T/10T, AC Battery

Supported system configurations:

Grid-tied solar and storage systems with IQ7 Series Microinverters, IQ Gateway Metered, and IQ Battery 3T/10T
Grid-tied solar and storage systems with compatible third-party string inverters, IQ Gateway Metered, and IQ Battery 3T/10T
Grid-tied solar and storage systems with M Series Microinverters, IQ Gateway Metered, and IQ Battery 3T/10T
Grid-tied solar and storage systems with IQ7 Series Microinverters, IQ Gateway Metered, and AC Battery
Grid-tied solar and storage systems with M Series Microinverters, IQ Gateway Metered, and AC Battery

#	Feature	Description
1	Bug fixes	Fixes the issue of multiple USB unplugged events observed in the Enphase Installer Portal. Fixes the issue of microinverters, batteries, and other devices not reporting status by improving the Zigbee communication. Fixes the issue of the Battery Management Unit (BMU) shutting down whenever the IQ battery is idle. Fixes the issue of undesirable power consumption (tare loss) by the battery when in idle state. Fixes the issue of IQ Battery maximum state-of-charge (SoC) being limited to 97% instead of 100%. Fixes the issue of Phase Imbalance Management (PIM) getting enabled for single-phase systems.

This release is being deployed via remote software upgrades for all systems.

IQ Gateway software release notes (7.6.346)

September 4, 2023

IQ Gateway software version 7.6.346 supports new microinverters and battery products for Sweden, Denmark, South Africa, and India. This release enables Consumption CT-based phase imbalance management (PIM) as the default method for complying with phase balancing requirements.

Gateways supported: IQ Gateway Metered
Countries: Sweden, Denmark, South Africa, and India
Microinverters supported: IQ8 Series Microinverters (IQ8MC-72-M-INT, IQ8AC-72-M-INT, IQ8HC-72-M-INT, IQ8P-72-2-INT), compatible third-party string inverters
IQ Battery supported: IQ Battery 3T/10T

Supported system configurations:

Grid-tied solar and storage systems with IQ8 Series Microinverters, IQ Gateway Metered, and IQ Battery 3T/10T for Sweden and Denmark
Grid-tied solar and storage systems with compatible third-party string inverters, IQ Gateway Metered, and IQ Battery 3T/10T for Sweden and Denmark
Grid-tied Solar Only systems with IQ8 Series Microinverters and IQ Gateway Metered for Sweden and Denmark
Grid-tied Solar Only systems with IQ8HC and IQ8P Microinverters and IQ Gateway Metered for South Africa
Grid-tied Solar Only systems with IQ8P Microinverters and IQ Gateway Metered for India

#	Feature	Description
1	IQ8HC and IQ8P Microinverter support	Supports IQ8HC and IQ8P Microinverters with IQ Gateway Metered for South Africa. Supports IQ8P Series Microinverters with IQ Gateway Metered for India.
2	IQ Battery support	Supports IQ Battery 3T/10T along with IQ8 Series Microinverters for Sweden and Denmark.
3	Compliant with phase balancing requirements in Sweden and Denmark to ensure imbalance between phases is below the allowed limit	Supports Consumption Current Transformer-based PIM for three-phase systems. 3.68 kVA PIM requirement is supported as specified in section A.3 of EN 50549-1:2019 for Denmark and Sweden. Note: M Series Microinverters and compatible third-party inverters are not controllable by an IQ Gateway. IQ Gateway does not support PIM and power export limiting for these inverters.
4	Bug Fixes	Fixes the issue of continuously triggering AC disconnect due to phase imbalance. Fixes the issue of IQ Battery maximum state-of-charge (SoC) being limited to 97% instead of 100%. Fixes the issue of solar production dropping to zero until the IQ Gateway is rebooted. Fixes the issue of IQ Battery exporting to grid when load is turned off with PIM active. Fixes the issue of solar power production stopping after turning on dynamic phase imbalance limiting.

The following known issues have been observed in IQ Gateway software version 7.6.346:

Known issues:

#	Feature	Description
1	PV production stops randomly for sites with a standard IQ Gateway	PV production stops whenever a grid profile with power Export Limiting or PIM is enabled at a site with a non-metered IQ Gateway. This issue will be fixed in upcoming software releases.
2	A large spike in consumption is reported in the Enphase App when the IQ Gateway software is upgraded to v7.6.346 from v7.6.168	The Enphase App reports a huge spike in consumption whenever the IQ Gateway software is upgraded to v7.6.346 from v7.6.168. Enphase mitigates this by deleting the records of that day for the system owner, thereby ensuring system owner-facing energy consumption figures are not affected.

This release is being deployed via remote software upgrades for all systems.

IQ Gateway software release notes (7.3.466)

January 6, 2023

IQ Gateway software version 7.3.466 is the next release version compliant with IEEE 1547-2018 for residential applications. It supports only the new IEEE 1547-2018 compliant IQ Gateways (SKU: ENV2-IQ-AM1-240) and IQ Combiners (SKUs: X2-IQ-AM1-240-4 and X2-IQ-AM1-240-4C).

Gateways supported: IQ Gateway (SKU: ENV2-IQ-AM1-240), IQ Combiner 4/4C (SKUs: X2-IQ-AM1-240-4 and X2-IQ-AM1-240-4C)
Countries: USA
Microinverters supported: IQ8 Series, IQ7 Series
Supported system configurations:

Grid-tied Solar Only system with IQ7 Series or IQ8 Series Microinverters, IQ Gateway or IQ Combiner 4/4C
Sunlight Backup system with IQ8 Series Microinverters, IQ Gateway or IQ Combiner 4/4C, and IQ System Controller 2
Home Essentials Backup or Full Energy Independence system with IQ7 Series Microinverters, IQ Gateway or IQ Combiner 4/4C, IQ System Controller 1/2, and IQ Battery 3/3T/10/10T
Home Essentials Backup or Full Energy Independence system with IQ8 Series Microinverters, IQ Gateway or IQ Combiner 4/4C, IQ System Controller 2, and IQ Battery 3/3T/10/10T

Note: The following features are supported only in specific configurations above:

Load control, generator support, and solar circuit control i.e., PV shedding are supported in configurations 2, 3, and 4.
Grid services are supported in configurations 3 and 4.

Release notes:

#	Feature	Description
1	Compliant with IEEE 1547-2018 Regulations (also present in IQ Gateway software release 7.3.463)	a. Supports limiting PV active power as a percentage of the nameplate. b. Supports enable or disable of permit service to allow or stop PV power production remotely. c. Meets the enter service criteria, where PV power production does not start unless the system voltage and frequency are within the specified limits for the prescribed delay time. After the delay time, power is ramped linearly at a rate not exceeding the nameplate power divided by the enter service period. d. Maintains exported active power at the point of common coupling (PCC) at less than 10% of the aggregate system rating. e. Supports the following mutually exclusive reactive power control modes: Constant power factor mode: the system operates at a constant power factor Voltage-reactive power mode (volt-var): the reactive power of the system is controlled as a function of voltage using a volt-var curve Active-reactive power mode (watt-var): the reactive power of the system is controlled as a function of active power using a watt-var curve Constant reactive power mode: the system maintains a constant reactive power f. Supports active power control for temporary frequency disturbances according to a parameterized frequency-droop (freq-watt) characteristic. g. Supports bringing the net power export to zero before going off-grid (when commanded to do so by user). h. Supports interoperability and data exchange over the local communication interface using IEEE 2030.5, including: Provision of nameplate information Provision of monitoring information, and Ability to read and write function and mode setting
2	Bug Fixes	Fixes an issue where sites were unable to commission with a Zigbee range extender and could not proceed with functional validation.

Feature

Description

Compliant with IEEE 1547-2018 Regulations (also present in IQ Gateway software release 7.3.463)

a. Supports limiting PV active power as a percentage of the nameplate.

b. Supports enable or disable of permit service to allow or stop PV power production remotely.

c. Meets the enter service criteria, where PV power production does not start unless the system voltage and frequency are within the specified limits for the prescribed delay time. After the delay time, power is ramped linearly at a rate not exceeding the nameplate power divided by the enter service period.

d. Maintains exported active power at the point of common coupling (PCC) at less than 10% of the aggregate system rating.

e. Supports the following mutually exclusive reactive power control modes:

Constant power factor mode: the system operates at a constant power factor
Voltage-reactive power mode (volt-var): the reactive power of the system is controlled as a function of voltage using a volt-var curve
Active-reactive power mode (watt-var): the reactive power of the system is controlled as a function of active power using a watt-var curve
Constant reactive power mode: the system maintains a constant reactive power

f. Supports active power control for temporary frequency disturbances according to a parameterized frequency-droop (freq-watt) characteristic.

g. Supports bringing the net power export to zero before going off-grid (when commanded to do so by user).

h. Supports interoperability and data exchange over the local communication interface using IEEE 2030.5, including:

Provision of nameplate information
Provision of monitoring information, and
Ability to read and write function and mode setting

Bug Fixes

Fixes an issue where sites were unable to commission with a Zigbee range extender and could not proceed with functional validation.

This release is being deployed in factories to the IEEE 1547-2018 compliant IQ Gateway and IQ Combiner devices. IQ Gateway software 7.3.466 release is being deployed via remote software upgrades for the new sites that receive IQ Gateways with software version 7.3.463 or lower version from the factory for Enphase Energy Systems. Installers have to contact Enphase Support while installing Enphase Energy Systems at the site with IQ Gateway which has software version 7.3.463 or lower version from the factory.

IQ Gateway software release notes (7.3.463)

December 7, 2022

IQ Gateway software version 7.3.463 is the next major release version compliant with IEEE 1547-2018 for residential applications. It supports Grid-tied Solar Only system with new IEEE 1547-2018 compliant IQ Gateways (SKU: ENV2-IQ-AM1-240) and IQ Combiners (SKUs: X2-IQ-AM1-240-4 and X2-IQ-AM1-240-4C).

Platforms supported: IQ Gateway (SKU: ENV2-IQ-AM1-240), IQ Combiner 4/4C (SKUs: X2-IQ-AM1-240-4 and X2-IQ-AM1-240-4C)
Geographies: USA
Microinverters supported: IQ8 Series, IQ7 Series
Supported system configurations: Grid-tied Solar Only system with IQ7 Series/IQ8 Series Microinverters, IQ Gateway or IQ Combiner 4/4C

Release notes:

#	Feature	Description
1	Compliant with IEEE 1547-2018 Regulations	a. Supports limiting PV active power as a percentage of the nameplate. b. Supports enable or disable of permit service to allow or stop PV power production remotely. c. Meets the enter service criteria, where PV power production does not start unless the system voltage and frequency are within the specified limits for the prescribed delay time. After the delay time, power is ramped linearly at a rate not exceeding the nameplate power divided by the enter service period. d. Maintains exported active power at the point of common coupling (PCC) at less than 10% of the aggregate system rating. e. Supports the following mutually exclusive reactive power control modes: Constant power factor mode: the system operates at a constant power factor Voltage-reactive power mode (volt-var): the reactive power of the system is controlled as a function of voltage using a volt-var curve Active-reactive power mode (watt-var): the reactive power of the system is controlled as a function of active power using a watt-var curve Constant reactive power mode: the system maintains a constant reactive power f. Supports active power control for temporary frequency disturbances according to a parameterized frequency-droop (freq-watt) characteristic. g. Supports bringing the net power export to zero before going off-grid (when commanded to do so by user). h. Supports interoperability and data exchange over the local communication interface using IEEE 2030.5, including: Provision of nameplate information Provision of monitoring information, and Ability to read and write function and mode setting

Feature

Description

Compliant with IEEE 1547-2018 Regulations

Constant power factor mode: the system operates at a constant power factor
Voltage-reactive power mode (volt-var): the reactive power of the system is controlled as a function of voltage using a volt-var curve
Active-reactive power mode (watt-var): the reactive power of the system is controlled as a function of active power using a watt-var curve
Constant reactive power mode: the system maintains a constant reactive power

Provision of nameplate information
Provision of monitoring information, and
Ability to read and write function and mode setting

This release is being deployed in factories to the IEEE 1547-2018 compliant IQ Gateway and IQ Combiner devices.

IQ Gateway software release notes (7.3.120)

October 25, 2022

IQ Gateway software version 07.03.120 is the next major release version with improvements in system quality and stability, reduced commissioning time, and enhanced Zigbee wireless communication.

Platforms Supported: IQ Gateway, IQ Combiner 3/3C/3-ES/3C-ES/4/4C, Envoy S Metered for North America
Geographies: USA, Mexico, Canada, Brazil
Microinverters supported: IQ8, IQ7, IQ6, M-Series, S-Series
Supported system configurations:
1. Grid-tied Solar Only system with M-Series or S-Series Microinverters, Envoy S Metered for North America
2. Grid-tied Solar Only system with IQ6-Series or IQ7-Series Microinverters, IQ Gateway or IQ Combiner 3/3C/3-ES/3C-ES/4/4C
3. Grid-tied Solar Only system with IQ8-Series Microinverters, IQ Gateway, or IQ Combiner 3/3C/3-ES/3C-ES/4/4C
4. Sunlight Backup system with IQ8-Series Microinverter, IQ Gateway or IQ Combiner 4/4C, and IQ System Controller 2
5. Home Essentials Backup or Full Energy Independence system with IQ6-Series or IQ7-Series Microinverters, IQ Gateway or IQ Combiner 3/3C/3-ES/3C-ES/4/4C , IQ system Controller 1/2 and IQ Battery 3/3T/10/10T
6. Home Essentials Backup or Full Energy Independence system with IQ8-Series Microinverters, IQ Gateway or IQ Combiner 4/4C, IQ System Controller 2 and IQ Battery 3/3T/10/10T
7. Home Essentials Backup or Full Energy Independence system with M215-Series or M250-Series Microinverters, Envoy S Metered for North America, IQ System Controller 1/2, and IQ Battery 3/3T/10/10T

Note: The following features are supported only in specific configurations above: Load control, generator support, and solar circuit control i.e., PV shedding are supported in configurations 4, 5, 6 and 7. Grid Services are supported in configurations 5, 6, and 7.

Release Notes:

#	Feature	Description
1	Enhancements for system stability	a. Improves microgrid stability in rare scenarios which in the past resulted in functional validation failures or voltage and frequency oscillations when OFF Grid. b. Removes incorrect battery power display as 0 for line 2 by sending the right phase configuration to cloud. c. Improves grid transitions by increasing ride through time for OFF Grid frequency limits. d. Fixes an issue for systems with generators where microinverter power production and IQ Battery discharge levels appear to be fluctuating when the system is OFF Grid and generator is operating at less than a minimum recommended load. e. Fixes an issue where IQ Battery oscillates between charging and discharging when at the reserve State of Charge (SoC) limit. The error was due to battery SoC maintenance logic using a marginally higher reference SoC to trigger SoC maintenance. SoC maintenance is triggered at the reserve SoC limit now and avoids errors. f. Ensures microgrid is formed and is retained for up to 12 hours even if a communication loss has happened prior to a grid outage. g. Enables IQ8 + IQ Battery systems to Sunlight Jump Start and power on by toggling the DC switches on the IQ Batteries when there is a Rapid Shutdown exit at night. Prior to the release in the rare scenario when the Enphase System Shutdown Switch (the Rapid Shutdown Initiator for IQ8) was used to turn the system off, while OFF Grid, the system could only be turned back on when there was PV power, i.e., during the daytime or when the utility grid power returned. h. Fixes an issue where PV exports to grid momentarily even when the system is configured with a zero PV export limit. In prior releases, when the Power Control Systems (PCS) implementation that ensures no export to grid from battery is triggered, due to a step change in load, a momentary export to grid from PV is seen.
2	Improvements to commissioning	a. Improves software upgrade architecture. Upgrades pause when MID is open i.e., the system is OFF Grid and resume when MID is closed i.e., the system is ON Grid. b. Provides MQTT (MQ Telemetry Transport) based streaming of Power Line Communications (PLC) frequency and signal strength to cloud. This is exercised during periods when the IQ Gateway is not transmitting or receiving PLC communication. The MQTT enables the Enphase cloud to show a frequency domain view of the data post a Fast Fourier Transform (FFT). This view can be used to determine if the PLC communication in a system can be degraded or disrupted by noise in the frequency band that the IQ Gateway and microinverters use for communication. c. Improves the reliability of firmware upgrades by retrying certain missed messages. d. Improves reliability of firmware upgrades during commissioning by adding more retries to cover multiple failed attempts. e. Provides “Total bytes remaining to transfer” and “Total bytes to transfer” information via REST API to Installer app during the commissioning process, enabling installers to get a better idea of total firmware upgrade time as well as time remaining for firmware upgrade to complete. f. Avoids opening of PV and battery relays by preventing IQ System Controller update/reset during the configuration of Current Transformers (CTs). This avoids installers having to wait for relays to close to continue CT configuration and consequently reduces commissioning time. g. Reports a “DC is turned on before AC” event to cloud when the DC switch on an IQ Battery is turned on before the IQ Battery is connected to AC power. This event indicates an incorrect power on sequence was followed for the IQ Battery. IQ Batteries must be connected to AC power before their DC switches are turned on. The event is used by Enphase cloud and Enphase customer support to educate installers and help installers avoid potential IQ Battery field failures due to use of the incorrect power sequence. h. Avoids unnecessary firmware updates for configuration files by exposing the version of the configuration files and checking the same in IQ Gateway software before upgrading. i. Speeds up the inventory retrieval processes which determines the devices (IQ Batteries, IQ System Controller and components within) are actively connected to the IQ Gateway to reduce overall commissioning time.
3	Enhancements to Zigbee communication	a. Avoids IQ Gateway reboot by fixing a crash of the process handling Zigbee communication. b. Reduces homeowner facing errors for lack of communication between IQ Gateway and IQ Batteries or IQ System Controller by raising the errors only if automatic recovery of Zigbee dongle is tried and has failed. c. Adds heartbeat messaging between IQ Gateway and IQ Batteries or IQ System Controller to detect scenarios where the Zigbee radio is nonresponsive so that automatic recovery is initiated. Note that every recovery attempt shows a Zigbee communication failure event for the homeowner. This event is automatically cleared post successful recovery. d. Fixes an issue wherein multiple events of IQ Batteries or IQ System Controller losing Zigbee communication are shown to the homeowner in Enphase App. This is done by avoiding a situation wherein the IQ Gateway repeatedly floods the Zigbee network with broadcast messages which prevent communication and then lead to communication failure events. e. Adds retries to IQ Gateway software communication via USB to Zigbee dongle to avoid IQ Gateway manual reboot when a Zigbee dongle communication error occurs. f. Supports firmware updates for old and new Zigbee dongles at the same time. g. Enhances Zigbee connection recovery by incorporating an automatic Zigbee module reset on IQ Batteries and IQ System Controller. This reset triggers when the Zigbee module in these devices is stuck in an erroneous state for a long period of time after having exhausted the allowed timeout for lack of communication with Zigbee dongle connected to the IQ Gateway. h. Improves Zigbee communication recovery by avoiding an immediate network change when the Zigbee USB dongle is disconnected and reconnected on the IQ Gateway. IQ Batteries and IQ System Controller can join the same network they were on and avoid a long-term lack of communication with IQ Gateway. i. Reduces Zigbee communication losses due to potential non-volatile memory corruption issues. j. Improves microgrid resiliency to Zigbee communication loss between IQ System Controller and IQ Gateway by improving communication between IQ System Controller and IQ Batteries which enables the batteries to stay operational and keep forming a microgrid.
4	Reintroduces grid services support	a. Restores Grid Services programs that had been inadvertently disabled by an earlier software release. b. Supports new modes for battery charging and discharging which can be used via Grid Services API offered by Enphase: • Charge from grid • Charge from solar with load priority - Excess power will be used to charge battery after serving loads • Charge from solar with battery priority - Excess power after charging the battery will be used to serve the loads • Discharge to load - Battery discharges to a level which is the minimum of the setpoint received from the Grid Services API and the load seen on the site • Discharge to net load - Battery discharges to support load that exceeds the PV production amount. c. Adds the ability to set Idle mode for IQ Batteries via Grid Services API. d. Adds capability for • Back-to-Back, overlapping and nested Grid Services events • Multiple commands can be sent to IQ Gateway/Envoy S by Grid Services API and each command has a delay and a duration timer. Delay specifies the time from command receipt till the point in time when the command should be active. Duration specifies the duration of time for which the command should be active. • Discharging or charging batteries at a specific set point rather than just at rated power • Automatic move to idle state (prevent charge or discharge) once utility-set target State of Charge is reached e. Enhances system behavior to honor discharge commitments in case of partial failure of IQ Batteries in a system. For example, if one IQ Battery fails the other IQ Batteries will increase their output power as much as possible to compensate for the battery which is not functional. f. Ensures the Grid Services data persists across IQ Gateway/Envoy S reboots and system resets.
5	Enhanced interface with Enphase Cloud	a. Fixes an issue wherein any local issue in IQ Gateway software while creating a performance report (microinverter, battery and meter data along with events) resulted in the abandoning the process of sending the entire performance report to Enphase cloud. Now the performance report creation continues with readings and events that do not show issues and the resultant report is sent to Enphase cloud. b. Enables real-time alerts about grid outages for homeowners via Enphase App. IQ Gateway software sends a real time notification report to Enphase cloud containing date and time information regarding when the outage began to support this feature. c. Allows quick debugging of IQ Gateways by Enphase customer support and engineering teams. IQ Gateway software opens a tunnel in response to a MQTT (MQ Telemetry Transport) command received from Enphase cloud. Earlier, a tunnel required manual intervention at the IQ Gateway or waiting for the ping interval set on IQ Gateway so that it communicates with Enphase cloud and receives the command to open a tunnel. d. Fixes an issue wherein a system would reject an Enphase app-based command to go On Grid, incorrectly citing a lack of grid i.e., power outage. This issue was seen in a prior software release, when the Enphase App was used to command the system to go ON Grid, after having previously commanded the system to go OFF Grid. e. IQ Gateway software reports a special event for IQ Batteries which do not sense AC voltage. This event is exposed to installers and is also used by Enphase customer support to educate installers on the risk of a potential RMA due to IQ Batteries discharging down to irrecoverable State of Charge (SoC) levels while turned on and not connected to AC power. f. Provides a new REST API to update IQ Battery serial numbers into non-volatile memory as a safeguard against memory corruption causing batteries to lose their serial number. g. IQ Gateway software immediately sets reserve the State of Charge (SoC) level received from Enphase cloud on to the IQ Battery instead of waiting for the next planned write cycle. This enables all batteries to charge/discharge as required by the new reserve SoC limit, immediately eliminating delays in the system’s reaction to reserve SoC changes.
6	Improvements to system restart while in a microgrid	a. Post a microgrid collapse due to overload, the IQ Battery firmware now does at least 40 system restart retries to increase the likelihood of a successful restart. The restarts are spaced out in exponentially increasing time intervals. b. Fixes an issue wherein a false detection of a PV breaker being opened by IQ System Controller during a Sunlight Jump Start leads to repeated failures of the system restart.
7	Bug fixes and feature enhancements	a. Fixes an issue wherein IQ Battery is charging from grid to maintain the State of Charge (SoC) even when SoC is higher than reserve SoC for backup-capable sites and when above Very Low SoC (VLS) threshold for Grid Tied non-backup battery sites. As of this IQ Gateway software release IQ Battery only charges from grid when SoC is below reserve SoC for backup-capable sites and when SoC is below VLS for Grid Tied sites. b. Improves Rapid Shutdown exit behavior i.e., behavior when the Enphase Energy system is turned on using the Enphase Energy Shutdown Switch (Rapid Shutdown initiator for grid forming IQ8 microinverters). If Rapid Shutdown exit happens when grid is available, the home is immediately connected to the grid but the IQ Batteries and IQ8 PV are only connected to the home and grid after the requisite entry service time period has elapsed. If Rapid Shutdown exit happens when the grid is not available, the home is immediately powered on via IQ Batteries and IQ8 PV. However, when the grid eventually comes back, the system waits for the requisite entry service time period before closing the Microgrid Interconnect Device (MID) relay to connect the home, IQ Batteries and IQ8 PV to the grid. c. Fixes an error which resulted in an “Exception occurred during execution” error being reported on the Enphase cloud administration portal in response to battery mode or tariff changes via the SITE_SETTINGS REST task. Note this error was only visible to Enphase internal personnel and had no effect on site functionality. d. Fixes an issue where retired IQ Batteries were mistakenly unretired. e. Fixes an issue wherein IQ Batteries were not discharging after a Zigbee range extender is provisioned on the system. f. Fixes an issue wherein PV production is set to 0 after a hardware-based power export limit is enabled and then cleared via Enphase Installer Platform. g. Grid profile is propagated after a timeout even if the DER relay (s) in the IQ System Controller are not closed. This helps in propagation of special grid profiles in systems where grid voltage/frequency are out of range of normal operation. h. Fixes an issue wherein USB failure errors are not cleared due to the IQ Gateway rebooting and the error persists unnecessarily on Enphase app. i. Improves recovery of Power Line Communication (PLC) between IQ Battery controller and IQ8X-BAT microinverters by automatically detecting loss of PLC to all micros and restarting the PLC stack, which then restores communication. j. Fixes an issue wherein redundant tariff tasks are issued to the system by the Enphase cloud. k. Fixes an issue where Very Low SoC (VLS) values, that can be set between 5% and 30% by homeowners in Enphase App, were sent to the IQ Gateway but were not successfully propagated to IQ Batteries. l. Fixes an issue in systems with generator integration where, after generator trips post a Low Voltage or Low Frequency Ride Through the system does not resume a microgrid with IQ Batteries and PV. m. Fixes an issue when post IQ Battery based system restart, at or below Very Low SoC (VLS) threshold, the batteries sometimes went to a Grid Tied state incorrectly and stopped forming a microgrid. n. Fixes an issue when the system transitions to Generator Mode with a generator connected, yet the IQ Battery incorrectly shows OFF Grid instead of Generator Mode. o. Fixes an issue with IQ Battery state toggling between ON Grid to Islanding to Grid Tied when Rapid Shutdown is initiated while the system is OFF Grid. This is seen in systems with IQ System Controller 2, IQ Batteries and IQ8 PV. p. Automatic recovery of IQ Battery from internal errors is improved to handle back-to-back power transistor driver faults. q. Fixes a rare issue where IQ System Controller settings did not change to the correct Multi Mode OFF Grid settings but stayed in a Grid Tied state during Low Voltage Ride Through (LVRT) condition. r. Fixes an issue where IQ Battery is not reporting normally, and reports issues post reconnection with IQ Gateway/Envoy S. s. Enhances protection features to prevent IQ Battery power transistor failures during IQ8X-BAT firmware upgrades.

This release is being deployed in factories to the IQ Gateway and Envoy S based devices stated above and through the Enphase Installer App for new systems as well as via remote software upgrades for existing systems.