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Inverter

Verto Plus

15–33.3 kW · Hybrid · Three-phase · 3 MPPTs · Whole-home backup

FroniusReleased 2026

83/ 100

Superior

Global

IP66 RatedWhole-Home BackupType I+II SPD

The verdict. In our Inverter class, Fronius Verto Plus leads on features & integration.

1stof 63 in InverterTop 10%class average 70.5
Compare this inverter →Ask Watt →
EV charging needs the accessory; protection and API limits. Verto Plus supports a separate Fronius Wattpilot Flex charger through its open interfaces. Wattpilot provides solar-surplus charging and OCPP 1.6J; the inverter does not contain an EV charger, and this evidence does not establish V2H or V2G. Commissioned metering, network, charger configuration and applicable firmware remain conditions; the maker recommends a Fronius Smart Meter for load control. The exact Plus manual treats Wattpilot as a load and documents Solar API activation and configuration. The Plus has DC Type 1+2 surge protection and AC Type 2, not an established AC Type 1 rating. Arc Guard AFCI is integrated but disabled on delivery; its configured activation must be distinguished from installed hardware. The manual and Solar API document establish local JSON data access and Modbus control, with firmware and endpoint limits; local JSON access is not unrestricted write control or local archive history. SunSpec registry SM-000039 covers Verto (Plus) 15.0-33.3 information-model interoperability, not grid approval, rapid shutdown or a live VPP programme. The scored benchmark remains Verto 33.3 Plus; string-only Verto variants are separate. Night standby is specified below 16 W rather than an exact measured 16 W. Source 1.Source 2.Source 3.Source 4.Source 5.

The assessment

How it scores, by category

Efficiency72
Design & Flexibility89
Thermal & Physical Resilience83
Features & Integration90
Safety & Compliance87
Guarantee & Backbone85
Energy Ecosystem76

Market position

1stof 63 in InverterTop 10%
568383

Our reading

Verto Plus sits at the top of the Inverter class with 83 points against a class average of 70.5. Its strongest scoring dimension is features & integration (90), running 17.6 points above the class average on this dimension. Key specifications: 98.15% peak efficiency, 3 MPPT inputs, 10-year warranty.

Dietreich Farquharson · review.solar

The data

Power
33.3kW
Type
Hybrid
Peak eff
98.15%
MPPTs
3
Technology architecture

Hybrid inverter

Architecture guide

Manages PV, battery DC and household AC through the inverter platform.

Product role
The battery remains a separate product even when it belongs to the same branded platform.
Published range
15–33.3 kW
Phase
Three phase
Backup boundary
Whole-home capability recorded
Architecture describes the product boundary. It is not a system design or an equipment-pairing decision.
Decision evidence

What the documents establish

Published evidence, source-reviewed non-disclosure and unresolved questions remain separate from the product score.

01Backup1 published · 0 reviewed absence · 0 not applicable · 0 open02Digital control5 published · 0 reviewed absence · 0 not applicable · 0 open04Operating envelope8 published · 0 reviewed absence · 0 not applicable · 0 open06Service pathway6 published · 0 reviewed absence · 0 not applicable · 0 open

Warranty coverage: 10-year term

Coverage includes

✓Parts
✓Labour
✓Extendable
Market typical10yr0yr5yr10yr15yr20yr25yr

Parts, labour & extendable · term longer than 24 of 95 scored inverters

No inverter in the fleet publishes a year-by-year performance or output guarantee the way panels and batteries do - this shows the covered term against the market-typical term and where every scored inverter’s term lands (grey dots, sized by model count), plus what the warranty actually includes.

Before you buy
Local positionUse a market view to check local availability, approvals and warranty scope.
Ask the installerWill the exact Verto Plus model satisfy the site phase, array, MPPT, export-control and local grid requirements?

Verification & sources

Market context

Global evidencechange in the site menu

Global benchmark. This scorecard is benchmarked globally. A global score does not imply local availability, certification, warranty coverage, or installer compatibility.

Benchmark anchor. Verto Plus is distinct from string-only Verto and requires external grid-switchover equipment for Full Backup. Scored model: Verto 33.3 Plus · checked 2026-08-07. Evidence.

Sources & references · checked 2026-08-30

Strong evidence coverage

26 of 26 scored criteria link directly to a published source.

Values marked estimated, derived, or not found remain visible on the audit sheet and do not carry the same evidential weight as a linked source. Coverage measures direct links, not an independent guarantee that a claim is correct.

Record correction. Australian Verto Plus datasheet, live Australian product and support pages, Fronius International Limited Warranty EN_0326 and CER export retrieved 10 August 2026. First-market US and DE overlay review 2026-08-30: official regional catalogues recorded; Australian overlays and scores unchanged. Bounded 6 October 2026 Plus EV/protection/protocol reconciliation: EN_V04 May2025 AU sheet, exact digital Plus manual4204260552, current Wattpilot support, Solar API V1 EN021-15052025 and SunSpec registry SM-000039. Accessory solar-surplus/OCPP EV band corrected; DC1+2/AC2, disabled-on-delivery AFCI, local JSON/API limitations and below16W standby bound explained. Other criteria, 33.3kW identity, markets, warranty and full-record verification dates unchanged.

Change ledger

Product record history

12 changes to this record · 1 product changed in this update
  1. Record updated

    Open protocol & API maturity: Evidence sources

    Before
    https://cer.gov.au/document/cec-approved-inverters; https://www.fronius.com/-/media/australia/se/downloads/se_ds_fronius_verto_plus_en.pdf; https://www.fronius.com/en-au/australia/solar-energy/business-owners/products-solutions/verto-plus-powerful-inverter; https://www.fronius.com/en/help-center/solar-energy/solar-inverters/support-verto
    After
    https://manuals.fronius.com/html/4204260552/en-US.html; https://sunspec.org/product-certification-registry; https://www.fronius.com/-/media/australia/se/downloads/se_ds_fronius_verto_plus_en.pdf; https://www.fronius.com/~/downloads/Solar%20Energy/Operating%20Instructions/42%2C0410%2C2012.pdf
    Primary datasheetOpen protocol & API maturity+5 in JSON record
  2. Record updated

    Energy Ecosystem pillar score

    Before
    67.9
    After
    76
    Primary datasheet
  3. Record updated

    Global score

    Before
    82
    After
    83
    Primary datasheet
  4. Evidence added

    Summary

    Before
    Not previously recorded
    After
    Verto Plus supports a separate Fronius Wattpilot Flex charger through its open interfaces. Wattpilot provides solar-surplus charging and OCPP 1.6J; the inverter does not contain an EV charger, and this evidence does not establish V2H or V2G. Commissioned metering, network, charger configuration and applicable firmware remain conditions; the maker recommends a Fronius Smart Meter for load control. The exact Plus manual treats Wattpilot as a load and documents Solar API activation and configuration. The Plus has DC Type 1+2 surge protection and AC Type 2, not an established AC Type 1 rating. Arc Guard AFCI is integrated but disabled on delivery; its configured activation must be distinguished from installed hardware. The manual and Solar API document establish local JSON data access and Modbus control, with firmware and endpoint limits; local JSON access is not unrestricted write control or local archive history. SunSpec registry SM-000039 covers Verto (Plus) 15.0-33.3 information-model interoperability, not grid approval, rapid shutdown or a live VPP programme. The scored benchmark remains Verto 33.3 Plus; string-only Verto variants are separate. Night standby is specified below 16 W rather than an exact measured 16 W.
    Primary datasheet
  5. Record updated

    EV charging integration: Evidence sources

    Before
    https://cer.gov.au/document/cec-approved-inverters; https://www.fronius.com/-/media/australia/se/downloads/se_ds_fronius_verto_plus_en.pdf; https://www.fronius.com/en-au/australia/solar-energy/business-owners/products-solutions/verto-plus-powerful-inverter; https://www.fronius.com/en/help-center/solar-energy/solar-inverters/support-verto
    After
    https://manuals.fronius.com/html/4204260552/en-US.html; https://www.fronius.com/-/media/australia/se/downloads/se_ds_fronius_verto_plus_en.pdf; https://www.fronius.com/en/help-center/solar-energy/e-mobility/support-wattpilot
    Primary datasheetShutdown / arc safety+4 in JSON record
  6. Record updated

    EV charging integration

    Before
    No EV integration
    After
    Smart OCPP EV charging (solar surplus tracking)
    Primary datasheetMax DC:AC oversizing ratio+4 in JSON record
  7. Record updated

    Shutdown / arc safety: Evidence sources

    Before
    https://cer.gov.au/document/cec-approved-inverters; https://www.fronius.com/-/media/australia/se/downloads/se_ds_fronius_verto_plus_en.pdf; https://www.fronius.com/en-au/australia/solar-energy/business-owners/products-solutions/verto-plus-powerful-inverter; https://www.fronius.com/en/help-center/solar-energy/solar-inverters/support-verto
    After
    https://manuals.fronius.com/html/4204260552/en-US.html; https://www.fronius.com/-/media/australia/se/downloads/se_ds_fronius_verto_plus_en.pdf
    Primary datasheetShutdown / arc safety+3 in JSON record
  8. Record updated

    Night standby consumption (W): Evidence sources

    Before
    https://cer.gov.au/document/cec-approved-inverters; https://www.fronius.com/-/media/australia/se/downloads/se_ds_fronius_verto_plus_en.pdf; https://www.fronius.com/en-au/australia/solar-energy/business-owners/products-solutions/verto-plus-powerful-inverter; https://www.fronius.com/en/help-center/solar-energy/solar-inverters/support-verto
    After
    https://www.fronius.com/-/media/australia/se/downloads/se_ds_fronius_verto_plus_en.pdf
    Primary datasheet+3 in JSON record
  9. Evidence added

    Title

    Before
    Not previously recorded
    After
    EV charging needs the accessory; protection and API limits
    Primary datasheet
  10. Record updated

    Surge protection: Evidence sources

    Before
    https://cer.gov.au/document/cec-approved-inverters; https://www.fronius.com/-/media/australia/se/downloads/se_ds_fronius_verto_plus_en.pdf; https://www.fronius.com/en-au/australia/solar-energy/business-owners/products-solutions/verto-plus-powerful-inverter; https://www.fronius.com/en/help-center/solar-energy/solar-inverters/support-verto
    After
    https://www.fronius.com/-/media/australia/se/downloads/se_ds_fronius_verto_plus_en.pdf; https://www.fronius.com/en-au/australia/solar-energy/business-owners/products-solutions/verto-plus-powerful-inverter
    Primary datasheetPeak efficiency (%)+2 in JSON record
  11. Evidence added

    Evidence sources

    Before
    Not previously recorded
    After
    https://manuals.fronius.com/html/4204260552/en-US.html; https://sunspec.org/product-certification-registry; https://www.fronius.com/-/media/australia/se/downloads/se_ds_fronius_verto_plus_en.pdf; https://www.fronius.com/en/help-center/solar-energy/e-mobility/support-wattpilot; https://www.fronius.com/~/downloads/Solar%20Energy/Operating%20Instructions/42%2C0410%2C2012.pdf
    Primary datasheet
  12. Record updated

    Source revision

    Current text
    Australian Verto Plus datasheet, live Australian product and support pages, Fronius International Limited Warranty EN_0326 and CER export retrieved 10 August 2026. First-market US and DE overlay review 2026-08-30: official regional catalogues recorded; Australian overlays and scores unchanged. Bounded 6 October 2026 Plus EV/protection/protocol reconciliation: EN_V04 May2025 AU sheet, exact digital Plus manual4204260552, current Wattpilot support, Solar API V1 EN021-15052025 and SunSpec registry SM-000039. Accessory solar-surplus/OCPP EV band corrected; DC1+2/AC2, disabled-on-delivery AFCI, local JSON/API limitations and below16W standby bound explained. Other criteria, 33.3kW identity, markets, warranty and full-record verification dates unchanged.

    The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.

    Primary datasheet
12 changes to this record · 12 products changed in this update
  1. Evidence added

    US Support Note

    Before
    Not previously recorded
    After
    Fronius USA's inverter technical-data catalogue lists Primo GEN24 208-240, Primo UL, Symo and Symo Advanced. It does not list Verto Plus. The US catalogue has no Verto Plus family. The exact US technical-data URL for Verto 33.3 Plus returns 404. The US GEN24 UL marketing page is the 208-240 family, which is a separate record.
    US market evidenceUS market evidence+1 in JSON record
  2. Evidence added

    DE Evidence sources

    Before
    Not previously recorded
    After
    https://www.fronius.com/de-de/germany/solarenergie/gewerbe-industrie/produkte-loesungen/verto-plus-leistungsstarker-wechselrichter; https://www.fronius.com/de-de/germany/solarenergie/installateure-partner/technische-daten/alle-produkte/wechselrichter; https://www.fronius.com/de-de/germany/solarenergie/installateure-partner/technische-daten/alle-produkte/wechselrichter/fronius-verto-plus/verto-33-3-plus; https://www.fronius.com/~/downloads/Solar%20Energy/Datasheets/SE_DS_Fronius_Verto_Plus_DE.pdf; https://www.fronius.com/~/downloads/Solar%20Energy/Terms%20of%20Warranties/SE_ToW_DE.pdf; https://www.fronius.com/~/downloads/Solar%20Energy/Terms%20of%20Warranties/SE_ToW_EN.pdf
    DE market evidenceWarranty period (yrs)+4 in JSON record
  3. Evidence added

    US Certifications

    Before
    Not previously recorded
    After
    US market evidenceUS market evidence+1 in JSON record
  4. Evidence added

    DE Grid and installation context

    Before
    Not previously recorded
    After
    Three-phase German hybrid family with exact VDE-AR-N 4105 and EN 50549 evidence naming Verto 33.3 Plus. Backup switching and export settings remain installation-specific.
    DE market evidenceWarranty period (yrs)+4 in JSON record
  5. Evidence added

    US Status

    Before
    Not previously recorded
    After
    unavailable
    US market evidenceUS market evidence+1 in JSON record
  6. Evidence added

    US Evidence sources

    Before
    Not previously recorded
    After
    https://www.fronius.com/en-us/usa/solar-energy/installers-partners/products-solutions/inverters-and-energy-solutions/gen24-ul-inverter-with-flexible-backup-power; https://www.fronius.com/en-us/usa/solar-energy/installers-partners/technical-data/all-products/inverters; https://www.fronius.com/en-us/usa/solar-energy/installers-partners/technical-data/all-products/inverters/fronius-primo-gen24/primo-gen24-3-8-208-240
    US market evidenceUS market evidence+1 in JSON record
  7. Record updated

    Source revision

    Before
    Australian Verto Plus datasheet, live Australian product and support pages, Fronius International Limited Warranty EN_0326 and CER export retrieved 10 August 2026
    After
    Australian Verto Plus datasheet, live Australian product and support pages, Fronius International Limited Warranty EN_0326 and CER export retrieved 10 August 2026. First-market US and DE overlay review 2026-08-30: official regional catalogues recorded; Australian overlays and scores unchanged.
    Primary datasheet
  8. Evidence added

    DE Certifications

    Before
    Not previously recorded
    After
    The German Verto Plus datasheet names Verto 15.0 Plus through Verto 33.3 Plus, including the scored 33.3 Plus, and lists IEC 62109-1/-2, VDE-AR-N 4105:2018, VDE-AR-N 4110:2023-09 and EN 50549-1/-2.
    DE market evidenceWarranty period (yrs)+4 in JSON record
  9. Evidence added

    DE Warranty scope

    Before
    Not previously recorded
    After
    Germany; country group 1. Inverters up to 49 kW receive 10 years (5 years Warranty Plus then 5 years Warranty). The scored Verto 33.3 Plus is inside that band. Solar.web registration within 30 months of factory delivery is required.
    DE market evidenceWarranty period (yrs)+4 in JSON record
  10. Evidence added

    DE Status

    Before
    Not previously recorded
    After
    available
    DE market evidenceWarranty period (yrs)+4 in JSON record
  11. Evidence added

    DE Warranty conditions

    Before
    Not previously recorded
    After
    labour: Approved removal and replacement labour is covered during the Warranty Plus period when Fronius or a Fronius-commissioned installer performs the work.; registration: Inverters must be registered on Solar.web within 30 months of factory delivery. Unauthorised repairs are not covered.; remedy: Fronius provides the required spare part or an equivalent replacement, or reimburses market value, under the governing terms.; removal reinstallation: Approved component removal and replacement are covered during the Warranty Plus period. Work on other site equipment is excluded.; transferability: Remaining claim rights transfer with ownership of the covered inverter. The term is not extended by the transfer.; transport: Standard national shipping to the Fronius repair centre, and return of the spare or replacement, is covered during the Warranty Plus period. Express, air and sea freight are excluded.
    DE market evidenceWarranty period (yrs)+4 in JSON record
  12. Evidence added

    DE Support Note

    Before
    Not previously recorded
    After
    Fronius Germany's technical-data catalogue names Verto 15.0 Plus through Verto 33.3 Plus. Verto 27.0 without Plus is a different identity and is not transferred onto this record.
    DE market evidenceWarranty period (yrs)+4 in JSON record
2 changes to this record · 147 products changed in this update
  1. Evidence added

    Certification: Verto 33.3 Plus (AS4777-2 2020)

    Before
    Not previously recorded
    After
    accepted at: 2026-08-29; category: inverter; certification model: Verto 33.3 Plus (AS4777-2 2020); jurisdiction: au_cec; match method: exact_normalized_single_record; product slug: fronius-verto-plus-au; source key: data/inverters/fronius_verto_plus_au.json; source manufacturer name: Fronius Australia Pty Ltd; validation: approved at: 2026-06-19; candidate model: Verto 33.3 Plus (AS4777-2 2020); data confidence: High; evidence url: https://cer.gov.au/document/cec-approved-inverters-0; expires at: 2029-06-19; list data version: au-cer-inverter-2026-08-20-51491c596569; list retrieved at: 2026-08-27T04:30:12Z; listing status at validation: listed
    AU market evidence
  2. Evidence added

    Certification model

    Before
    Not previously recorded
    After
    Verto 33.3 Plus (AS4777-2 2020)
    AU market evidence
4 changes to this record · 73 products changed in this update
  1. Evidence added

    State

    Before
    Not previously recorded
    After
    supported
    Primary datasheetMax DC:AC oversizing ratio+2 in JSON record
  2. Evidence added

    Value

    Before
    Not previously recorded
    After
    Direct-pv hybrid inverter with 3 independent MPPTs at the scored model boundary.
    Primary datasheetMax DC:AC oversizing ratio+2 in JSON record
  3. Evidence added

    Evidence sources

    Before
    Not previously recorded
    After
    https://cer.gov.au/document/cec-approved-inverters; https://www.fronius.com/-/media/australia/se/downloads/se_ds_fronius_verto_plus_en.pdf; https://www.fronius.com/en-au/australia/solar-energy/business-owners/products-solutions/verto-plus-powerful-inverter; https://www.fronius.com/en/help-center/solar-energy/solar-inverters/support-verto
    Primary datasheetMax DC:AC oversizing ratio+2 in JSON record
  4. Evidence added

    Confidence

    Before
    Not previously recorded
    After
    high
    Primary datasheetMax DC:AC oversizing ratio+2 in JSON record

This is review.solar's publication history. It does not claim the product changed on the recorded date, and it excludes compatibility, system pairing, installation suitability and relative leaderboard prose. Open the complete JSON record.

Evidence timeline

Recorded verification events for this scorecard. These are evidence checks, not historical score snapshots.

  1. Core scorecard evidence checked
  2. US market evidence checked
  3. DE market evidence checked
  4. Australian certification source identity verified
  5. AU market evidence checked
  6. Plain-language warranty summary checked
  7. Series benchmark evidence checked

Evidence record (JSON)

Scored by Solar Analytica Research

Further reading from Findings

Australian buying guide

Place this scorecard beside the other Australian buyer-ready inverters, with quote questions and direct evidence coverage visible before you compare.

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