What is the difference between Fronius GEN24 and GEN24 Plus?

Both use the same platform: single-phase 208/240 V, 3.8 to 10 kW, two MPP trackers and PV Point basic backup. GEN24 Plus adds a high-voltage battery input (150–455 V) and supports Essential Backup and Full Backup. A GEN24 can be upgraded to GEN24 Plus with the Fronius UP.storage software upgrade.

Which batteries work with the Fronius GEN24 Plus in the US?

Fronius US currently lists the RENON Xtreme HV 1.0 US battery (9.6, 14.4 or 19.2 kWh) for GEN24 Plus. CSE confirms compatibility and the backup configuration for every project.

Does the Fronius GEN24 meet rapid shutdown requirements?

GEN24 has a built-in SunSpec power-line transmitter certified as PV rapid-shutdown equipment for NEC 2023 section 690.12. Fronius states it must be installed with other equipment, such as SunSpec-compliant module-level devices, to form a complete rapid-shutdown system. The Fronius Rapid Shutdown Box is for SnapINverters, not GEN24.

What does the Fronius Smart Meter WR do?

The Smart Meter WR is a bidirectional meter that reports grid and load energy flow to the inverter over Modbus RTU (RS485), for self-consumption and feed-in control. Fronius requires it at the feed-in point for GEN24 Essential Backup and when other energy producers are present.

What is the Fronius Essential Backup Load Unit (EBLU)?

The EBLU is a microgrid interconnect device for the GEN24 Plus. During an outage it disconnects the grid from the GEN24 Plus and the backup subpanel; it is designed for 50 A of grid passthrough. Fronius made it available in the US from April 30, 2026. Ask CSE about availability.

Is the Fronius Symo Advanced still available?

Fronius US still lists Symo Advanced three-phase models. At CSE they are Call for Availability: send your project details and CSE confirms availability for each order.

I have a Fronius Primo SnapINverter. Can CSE help?

Yes. CSE keeps previous-generation Fronius Primo listings and SnapINverter accessories for replacement and service. Availability is confirmed per request. For new systems, CSE recommends the Fronius GEN24 or GEN24 Plus; a GEN24 is not a drop-in replacement, so the design must be checked.

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Fronius at CSE Solar USA

Fronius Solar InvertersGEN24 & GEN24 Plus for modern residential solar and backup applications

The Fronius Primo GEN24 is a single-phase 208/240 V string inverter from 3.8 to 10 kW with two MPP trackers and PV Point basic backup built in. The GEN24 Plus adds a battery input with Essential Backup and Full Backup. Shop current Fronius GEN24 inverters at CSE Solar USA with live pricing, or get help planning a system.

Shop Fronius Get a system quote

24Fronius listings
GEN24 · GEN24 Plusone platform, 3.8–10 kW
(702) 608-8385talk to a specialist

3.8–10 kWPrimo GEN24 power classes (240 V)
2 MPPTon every GEN24 and GEN24 Plus model
Up to 97.6%maximum efficiency (GEN24 3.8–6.0, 240 V)
1,560 VAPV Point backup outlet at 120 V, no battery needed

The Fronius GEN24 platform

GEN24 or GEN24 Plus: two pathways on one platform

Both families share the same power classes, two MPP trackers and PV Point. Choose GEN24 for solar-first homes, or GEN24 Plus when you want battery storage and backup.

Fronius GEN24

Solar-first string inverter with PV Point basic backup

Single-phase 208/240 V inverter with two MPP trackers. During a grid outage, PV Point supplies one outlet with up to 1,560 VA at 120 V while the sun shines, without a battery. A GEN24 can later be upgraded to GEN24 Plus with the Fronius UP.storage software upgrade.

Solar array2 MPP trackers, up to 600 V DC
Primo GEN243.8–10 kW · 208/240 V
PV PointBasic backup outlet · 1,560 VA at 120 V
Home and gridGrid-tied operation
Fronius Solar.webMonitoring; register for full warranty coverage

Source: Fronius Primo GEN24 208-240 & GEN24 208-240 Plus US datasheet (EN V09, Aug 2025) and GEN24 US operating manuals.

Fronius GEN24 Plus

Hybrid inverter for battery storage and backup

Adds one high-voltage battery input (150–455 V). GEN24 Plus supports Essential Backup and Full Backup up to the inverter’s rated power; Full Backup needs external grid-separation components. Fronius US currently lists the RENON Xtreme HV 1.0 US battery for GEN24 Plus.

Solar array2 MPP trackers
Primo GEN24 PlusBattery input 150–455 V
BatteryRENON Xtreme HV 1.0 US (Fronius US listing)
Essential or Full BackupBackup loads or whole home, with grid separation
Home and gridSelf-consumption and backup

Source: Fronius Primo GEN24 208-240 & GEN24 208-240 Plus US datasheet (EN V09, Aug 2025) and GEN24 US operating manuals. Battery listing: Fronius US GEN24 overview page.

Simplified illustrations of Fronius-documented configurations. Backup design, grid-separation equipment, battery sizing and rapid-shutdown devices depend on the site and local code; CSE confirms the bill of materials for every project.

Choose your pathway

GEN24 vs GEN24 Plus

Same inverter platform and power classes. The difference is battery storage and how much of the home stays powered during an outage.

GEN24 vs GEN24 Plus
Specification	Fronius GEN24Primo GEN24 208-240	Fronius GEN24 PlusPrimo GEN24 208-240 Plus
Best for	Solar-only homes that want simple basic backup	Solar plus battery storage and backup
Power classes (240 V)	3.8 / 5.0 / 6.0 / 7.7 / 10.0 kW	3.8 / 5.0 / 6.0 / 7.7 / 10.0 kW
MPP trackers	2	2
Battery input	—	1 DC input, 150–455 V, 22 A
Backup without a battery	PV Point: one outlet, up to 1,560 VA at 120 V	PV Point: one outlet, up to 1,560 VA at 120 V
Backup with a battery	—	Essential Backup or Full Backup (up to rated power, with external grid-separation components)
Upgrade path	Upgradeable to GEN24 Plus (Fronius UP.storage)	—
Rapid shutdown	Built-in SunSpec transmitter; add SunSpec module-level devices	Built-in SunSpec transmitter; add SunSpec module-level devices

Source: Fronius Primo GEN24 208-240 & GEN24 208-240 Plus US datasheet (EN V09, Aug 2025) and GEN24 US operating manuals. The built-in transmitter is PV rapid-shutdown equipment and must be combined with compatible module-level devices to form a complete NEC 690.12 system.

Fronius at CSE

Current Fronius GEN24 inverters at CSE

Fronius Primo GEN24 and GEN24 Plus models available to order now, with live pricing from the CSE store.

Fronius Primo GEN24 208-240 10 kW Hybrid PV Inverter | Single Phase Grid-Tie

Model 4.210.144.800

10,000 W at 240 V · 9,450 W at 208 V · 2 MPPT

In Stock

$2,949.00

Add to Cart Details →

Fronius Primo GEN24 5 kW Solar Inverter – 208-240 V Single Phase

Model 4.210.141.800

5,000 W at 240 V and 208 V · 2 MPPT

In Stock

$1,799.00

Add to Cart Details →

Fronius Primo GEN24 6.0-208-240 6.0 kW Hybrid Inverter - On-Grid

Model 4.210.142.800

6,000 W at 240 V · 5,740 W at 208 V · 2 MPPT

In Stock

$1,809.13

Add to Cart Details →

Fronius Primo GEN24 PLUS 5.0 208-240V Hybrid String Inverter – Grid-Tie

Model 4.210.141.802

5,000 W · battery input 150–455 V · Full Backup

In Stock

$2,107.79

Add to Cart Details →

Listed prices are CSE Solar USA prices. Availability, lead time and freight are confirmed for every order. Other GEN24 Plus power classes are available as Call for Availability in the full catalog below.

Commercial three-phase

Fronius Symo Advanced for commercial systems

Three-phase string inverters for 208-240 V and 480 V commercial sites, kept separate from the residential GEN24 range. Availability is confirmed per order.

Symo Advanced 10.0-3 and 12.0-3 for 208-240 V three-phase; 22.7-3 for 480 V
Two MPP trackers; NEMA 4X enclosure; -40 to +140 °F
Integrated AFCI and SunSpec rapid-shutdown transmitter
UL 3741 certified with listed flat-roof racking (Symo Advanced only)

Request a commercial quote View all Fronius products

Fronius Symo Advanced 10.0-3 | 10kW 3-Phase Solar Inverter (208/240V Grid-Tied)

Model 4.210.090.801

9,995 W · 208-240 V three-phase · 2 MPPT

Call for Availability

$3,175.25

Check Availability Details →

Fronius Symo Advanced 12kW 3-Phase Solar Inverter (208/240V, Dual MPPT, Grid-Tied)

Model 4.210.091.801

11,995 W · 208-240 V three-phase · 2 MPPT

Call for Availability

$3,284.02

Check Availability Details →

FRONIUS SYMO ADVANCED LITE 22.7-3 22.7KW 3-PH INVERTER

Model 4,210,094,801

22,727 W · 480 V three-phase · 2 MPPT

Call for Availability

$3,355.25

Check Availability Details →

Product families

Monitoring, meters, accessories and support

Metering and monitoring for Fronius systems, SnapINverter accessories, and previous-generation Fronius Primo models kept for replacement and support.

Monitoring and metering
Smart Meter WR and Datamanager 2.0
The Fronius Smart Meter WR is a bidirectional meter that reports grid and load energy flow to the inverter over Modbus RTU, for self-consumption and feed-in control; Fronius requires it at the feed-in point for GEN24 Essential Backup. The Datamanager 2.0 card adds Wi-Fi/LAN monitoring to Galvo, Primo and Symo inverters.
- Fronius Smart Meter WR
- Datamanager 2.0 WLAN card
SnapINverter accessories
Rapid Shutdown Box and accessories
Fronius Rapid Shutdown Box-Duo and -Quattro are NEC 2014 690.12 array disconnects for Fronius SnapINverters (Galvo, Primo, Symo). They are not used with GEN24, which has a built-in SunSpec transmitter. Also listed: Symo MC4 connectors and the SnapINverter shade cover.
Legacy and support
Fronius Primo SnapINverter (previous generation)
CSE keeps previous-generation Fronius Primo listings for replacement and service searches. Availability is confirmed per request. For new residential systems, CSE recommends the Fronius GEN24 and GEN24 Plus.

Applications

Where Fronius fits

Residential rooftop solar
Primo GEN24 single-phase inverters from 3.8 to 10 kW with two MPP trackers and PV Point basic backup.
Solar plus battery backup
Primo GEN24 Plus with a Fronius-listed high-voltage battery for Essential Backup or Full Backup.
Commercial three-phase
Symo Advanced for 208-240 V and 480 V three-phase sites.
Replacement and service
Previous-generation Fronius Primo and SnapINverter accessories for existing systems.

Why CSE Solar USA

Why buy Fronius through CSE Solar USA

Live CSE pricing
Prices on this page come straight from the CSE store and update with every change.
Help planning the system
Tell us your array, roof and backup goals; we help match the GEN24 power class, metering and backup equipment.
Residential to commercial
From single-phase GEN24 to three-phase Symo Advanced, quoted per project.
One supplier for the whole system
Solar panels, inverters, racking and balance-of-system from one order.

Technical resources

Fronius datasheets and documents

Official Fronius US datasheets and manuals (open fronius.com).

FAQ

Fronius inverters: frequently asked questions

What is the difference between Fronius GEN24 and GEN24 Plus?: Both use the same platform: single-phase 208/240 V, 3.8 to 10 kW, two MPP trackers and PV Point basic backup. GEN24 Plus adds a high-voltage battery input (150–455 V) and supports Essential Backup and Full Backup. A GEN24 can be upgraded to GEN24 Plus with the Fronius UP.storage software upgrade.
What is Fronius PV Point?: PV Point is basic backup built into GEN24 and GEN24 Plus: during a grid outage it supplies one outlet with up to 1,560 VA at 120 V while the sun shines, without a battery. Fronius also offers the PV Point Comfort retrofit board, which keeps the outlet powered (1.6 kW continuous at 120 V).
Which batteries work with the Fronius GEN24 Plus in the US?: Fronius US currently lists the RENON Xtreme HV 1.0 US battery (9.6, 14.4 or 19.2 kWh) for GEN24 Plus. CSE confirms compatibility and the backup configuration for every project.
Does the Fronius GEN24 meet rapid shutdown requirements?: GEN24 has a built-in SunSpec power-line transmitter certified as PV rapid-shutdown equipment for NEC 2023 section 690.12. Fronius states it must be installed with other equipment, such as SunSpec-compliant module-level devices, to form a complete rapid-shutdown system. The Fronius Rapid Shutdown Box is for SnapINverters, not GEN24.
What does the Fronius Smart Meter WR do?: The Smart Meter WR is a bidirectional meter that reports grid and load energy flow to the inverter over Modbus RTU (RS485), for self-consumption and feed-in control. Fronius requires it at the feed-in point for GEN24 Essential Backup and when other energy producers are present.
What is the Fronius Essential Backup Load Unit (EBLU)?: The EBLU is a microgrid interconnect device for the GEN24 Plus. During an outage it disconnects the grid from the GEN24 Plus and the backup subpanel; it is designed for 50 A of grid passthrough. Fronius made it available in the US from April 30, 2026. Ask CSE about availability.
Is the Fronius Symo Advanced still available?: Fronius US still lists Symo Advanced three-phase models. At CSE they are Call for Availability: send your project details and CSE confirms availability for each order.
I have a Fronius Primo SnapINverter. Can CSE help?: Yes. CSE keeps previous-generation Fronius Primo listings and SnapINverter accessories for replacement and service. Availability is confirmed per request. For new systems, CSE recommends the Fronius GEN24 or GEN24 Plus; a GEN24 is not a drop-in replacement, so the design must be checked.

Quotes & system design help

Get a quote for a Fronius system

Residential and battery backup. Send your module model and count, roof layout, backup goals and delivery ZIP. CSE matches the GEN24 or GEN24 Plus power class, metering and backup equipment.

Commercial and replacement. Send the site voltage, array size or the model you are replacing. CSE confirms Symo Advanced or replacement availability per order.

Request a system quote Request a commercial quote Call (702) 608-8385

Full Fronius catalog