back to panels

Premium Performance · legacy record

EverVolt HK2

420–430 W · HJT

PanasonicReleased 2021

73/ 100

Very good

Global

The verdict. Historical assessment, retained under its original rubric. Not ranked against current products.

Compare this panel →Ask Watt →
Legacy record. Panasonic Corporation of North America states that it discontinued its solar and battery storage business line. Existing customer support continues and Panasonic states that applicable warranties will be honoured. Source. Scored 73 under panel v2.5.0 and frozen as of 2026-07-05: this product is no longer in active assessment or live comparison, and its score is not maintained against the current rubric. Its pillar scores and audit sheet are preserved from the original assessment, including original estimates and gaps. Current safety and support notices are shown separately. Consult current warranty documents for claim decisions.
Worth knowing. Panasonic has discontinued its US solar and battery storage business and no longer sells these products. Its live support service says it continues to support existing customers and active product warranties, including claims and transfers. Replacement options nevertheless depend on a company that has left the category. Source. A warranty is only as valuable as the entity standing behind it. Ask your retailer who services this warranty now.

The assessment

Historical assessment, by category

Architecture & Design78
Efficiency & Yield63
Durability (verified)61
Performance & Degradation86
Guarantee & Backbone82
Sustainability72

The data

Power
Not recorded
Efficiency
22.2%
Cell
Heterojunction
Temp coeff
-0.24%/°C
Technology architecture

HJT module

Architecture guide

Produces DC electricity at the roof. It contains no system-level power conversion or storage.

Product role
None in the module.
Published range
420–430 W
Electrical layer
DC module output
Construction
Not recorded
Architecture describes the product boundary. It is not a system design or an equipment-pairing decision.

Performance guarantee: 25-year linear output

430 Wrated396W at yr 25
859095100Guaranteed floor 92.0%93.0%0yr5yr10yr15yr20yr25yr
Projected outputGuaranteed floor: 92.0% at yr 25

Wattage figure based on the sourced rated power (430 W) applied to the guaranteed floor; modular/format differences aside, this is the same rated-power spec shown above.

Modelled effective output, year by year

391W368W

Year 1 to year 25, at 30°C and 1000 W/m². Rated 430 W at STC.

How this is modelled

Compounds this panel’s own published first-year (1%) and annual (0.25%/yr) degradation figures against its 430 W rated (STC) output, then derates for the ambient and irradiance selected. Output is scaled roughly linearly with irradiance (1000 W/m² against the 1000 W/m² STC reference). This is the dominant real-world effect at low light, whether from cloud, shading or soiling. Output is then further derated for heat, from this panel’s own NOCT (43°C) and temperature coefficient (-0.24%/°C), giving an estimated cell temperature of 59°C at that ambient and irradiance. A datasheet-derived estimate, not a field measurement or a warranty guarantee: it does not account for this panel’s own low-light efficiency response (a separate, less-consistently-published spec), or for wind and system design. See NOCT and temperature coefficient in the glossary.

Control panel

30°C
1000 W/m²
Year1510152025
Watts391 W387 W382 W377 W372 W368 W
% of rated91.0%90.1%88.9%87.8%86.6%85.5%
Before you buy
Local positionUse a market view to check local availability, approvals and warranty scope.
Ask the installerWill the quote name the exact EverVolt HK2 model and wattage, and who covers labour if the module warranty is used?

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. The score is anchored to the highest published US rating for this exact series. Scored model: EverVolt EVPV430HK2-BLK · checked 2026-07-16. Evidence.

Sources & references · checked 2026-09-02

Minimal evidence coverage

0 of 28 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 revision. Panasonic EVERVOLT HK2 RS23184DS-R6, EVPV420/430HK2. India existing-catalogue panel ALMM review 2026-09-02: IN overlays recorded against List-I revision 03.08.2026; scores unchanged.

Change ledger

Product record history

85 changes to this record · 2 products changed in this update
  1. Evidence added

    Contact: Evidence status

    Before
    Not previously recorded
    After
    estimated
    No direct source binding recorded
  2. Evidence added

    Guaranteed end-of-warranty output (%)

    Before
    Not previously recorded
    After
    92.0
    No direct source binding recorded
  3. Evidence added

    Hail resistance

    Before
    Not previously recorded
    After
    IEC 61215 standard (25mm)
    No direct source binding recorded
  4. Record updated

    PID (IEC TS 62804): Evidence sources

    Before
    https://es-media-prod.s3.amazonaws.com/media/components/panels/spec-sheets/Panasonic_EVERVOLT_EVPV430_420HK2_Data_Sheet_1.pdf
    After
    Fire classification (IEC 61730)superseded
  5. Evidence added

    Hail resistance: Evidence sources

    Before
    Not previously recorded
    After
    No direct source binding recorded
  6. Evidence added

    Module efficiency (%): Evidence status

    Before
    Not previously recorded
    After
    estimated
    No direct source binding recorded
  7. Record updated

    Efficiency & Yield pillar score

    Before
    50.1
    After
    62.9
    Primary datasheet
  8. Evidence added

    Performance guarantee period (yrs): Evidence status

    Before
    Not previously recorded
    After
    estimated
    No direct source binding recorded
  9. Record updated

    Guarantee & Backbone pillar score

    Before
    47.2
    After
    81.5
    Primary datasheet
  10. Evidence added

    First-year degradation (%): Evidence status

    Before
    Not previously recorded
    After
    estimated
    No direct source binding recorded
  11. Record updated

    Performance & Degradation pillar score

    Before
    40
    After
    85.5
    Primary datasheet
  12. Evidence added

    Cell architecture: Evidence status

    Before
    Not previously recorded
    After
    estimated
    No direct source binding recorded
  13. Evidence added

    Performance guarantee period (yrs): Evidence sources

    Before
    Not previously recorded
    After
    No direct source binding recorded
  14. Evidence added

    Verified reliability: Evidence status

    Before
    Not previously recorded
    After
    estimated
    No direct source binding recorded
  15. Evidence added

    Power tolerance (%)

    Before
    Not previously recorded
    After
    3
    No direct source binding recorded
  16. Evidence added

    Financial strength & warranty backing: Evidence sources

    Before
    Not previously recorded
    After
    No direct source binding recorded
  17. Evidence added

    Awards: Evidence status

    Before
    Not previously recorded
    After
    estimated
    No direct source binding recorded
  18. Record updated

    Independent energy yield: Evidence sources

    Before
    https://scorecard.pvel.com/methodology/; https://scorecard.pvel.com/top-performers/; https://scorecard.pvel.com/wp-content/uploads/2022-PVEL-PV-Module-Reliability-Scorecard-Summary.pdf; https://scorecard.pvel.com/wp-content/uploads/2024-PV-Module-Reliability-Scorecard.pdf
    After
    Independent energy yieldIndependent energy yield+2 in JSON record
  19. Evidence added

    Manufacturing track record

    Before
    Not previously recorded
    After
    15+ years, field-proven
    No direct source binding recorded
  20. Evidence removed

    Cell technology tier

    Before
    Heterojunction (HJT) tier
    After
    No longer recorded
    Primary datasheet
  21. Evidence added

    Financial strength & warranty backing

    Before
    Not previously recorded
    After
    Stable / listed
    No direct source binding recorded
  22. Evidence added

    Warranty transferability

    Before
    Not previously recorded
    After
    Transferable (buyer registration required within grace period)
    No direct source binding recorded
  23. Record updated

    Salt mist (IEC 61701): Evidence sources

    Before
    https://es-media-prod.s3.amazonaws.com/media/components/panels/spec-sheets/Panasonic_EVERVOLT_EVPV430_420HK2_Data_Sheet_1.pdf
    After
    Fire classification (IEC 61730)superseded
  24. Record updated

    Positive loading (MQT16, Pa): Evidence status

    Before
    sourced
    After
    not_found
    Fire classification (IEC 61730)superseded
  25. Evidence added

    Cell architecture

    Before
    Not previously recorded
    After
    Heterojunction (HJT)
    No direct source binding recorded
  26. Evidence added

    Module efficiency (%): Evidence sources

    Before
    Not previously recorded
    After
    No direct source binding recorded
  27. Record updated

    PID (IEC TS 62804): Evidence status

    Before
    sourced
    After
    not_found
    Fire classification (IEC 61730)superseded
  28. Evidence added

    First-year degradation (%): Evidence sources

    Before
    Not previously recorded
    After
    No direct source binding recorded
  29. Evidence added

    Awards

    Before
    Not previously recorded
    After
    Not Listed
    No direct source binding recorded
  30. Evidence added

    Manufacturing track record: Evidence status

    Before
    Not previously recorded
    After
    estimated
    No direct source binding recorded
  31. Evidence added

    Module efficiency (%)

    Before
    Not previously recorded
    After
    22.2
    No direct source binding recorded
  32. Evidence added

    Warranty transferability: Evidence status

    Before
    Not previously recorded
    After
    estimated
    No direct source binding recorded
  33. Evidence added

    Carbon footprint / EPD

    Before
    Not previously recorded
    After
    EPD published (intensity disclosed, not low-carbon certified)
    No direct source binding recorded
  34. Evidence added

    Verified reliability

    Before
    Not previously recorded
    After
    Not independently tested
    No direct source binding recorded
  35. Evidence added

    Encapsulation & frame construction: Evidence status

    Before
    Not previously recorded
    After
    estimated
    No direct source binding recorded
  36. Record updated

    Guarantee assurance: Evidence status

    Before
    sourced
    After
    not_found
    Primary datasheet
  37. Evidence added

    Low-light / IAM coefficient

    Before
    Not previously recorded
    After
    Low-light performance stated by manufacturer
    No direct source binding recorded
  38. Record updated

    Sustainability pillar score

    Before
    63.5
    After
    71.8
    Primary datasheet
  39. Record updated

    End-of-life & recycling disclosure: Evidence status

    Before
    sourced
    After
    not_found
    End-of-life & recycling disclosuresuperseded
  40. Evidence added

    Low-light / IAM coefficient: Evidence status

    Before
    Not previously recorded
    After
    estimated
    No direct source binding recorded
  41. Record updated

    Temp coefficient Pmax (%/C): Evidence status

    Before
    sourced
    After
    not_found
    Primary datasheet
  42. Record updated

    Architecture & Design pillar score

    Before
    60.6
    After
    78.4
    Primary datasheet
  43. Evidence added

    Carbon footprint / EPD: Evidence status

    Before
    Not previously recorded
    After
    estimated
    No direct source binding recorded
  44. Evidence added

    NOCT (C): Evidence sources

    Before
    Not previously recorded
    After
    No direct source binding recorded
  45. Evidence added

    Power tolerance (%): Evidence status

    Before
    Not previously recorded
    After
    estimated
    No direct source binding recorded
  46. Evidence added

    Contact: Evidence sources

    Before
    Not previously recorded
    After
    No direct source binding recorded
  47. Evidence added

    Guarantee period (yrs): Evidence sources

    Before
    Not previously recorded
    After
    No direct source binding recorded
  48. Record updated

    Positive loading (MQT16, Pa): Evidence sources

    Before
    https://es-media-prod.s3.amazonaws.com/media/components/panels/spec-sheets/Panasonic_EVERVOLT_EVPV430_420HK2_Data_Sheet_1.pdf
    After
    Fire classification (IEC 61730)superseded
  49. Evidence added

    Contact

    Before
    Not previously recorded
    After
    Advanced MBB
    No direct source binding recorded
  50. Evidence added

    Awards: Evidence sources

    Before
    Not previously recorded
    After
    No direct source binding recorded
  51. Evidence added

    Annual degradation (%/yr)

    Before
    Not previously recorded
    After
    0.25
    No direct source binding recorded
  52. Evidence added

    Hail resistance: Evidence status

    Before
    Not previously recorded
    After
    estimated
    No direct source binding recorded
  53. Record updated

    Independent energy yield

    Before
    No public independent yield result found in reviewed sources
    After
    Not independently yield-tested
    Independent energy yieldIndependent energy yield+2 in JSON record
  54. Evidence added

    Power tolerance (%): Evidence sources

    Before
    Not previously recorded
    After
    No direct source binding recorded
  55. Record updated

    Salt mist (IEC 61701): Evidence status

    Before
    sourced
    After
    not_found
    Fire classification (IEC 61730)superseded
  56. Record updated

    Fire classification (IEC 61730): Evidence sources

    Before
    https://es-media-prod.s3.amazonaws.com/media/components/panels/spec-sheets/Panasonic_EVERVOLT_EVPV430_420HK2_Data_Sheet_1.pdf
    After
    Fire classification (IEC 61730)superseded
  57. Evidence added

    Performance guarantee period (yrs)

    Before
    Not previously recorded
    After
    25
    No direct source binding recorded
  58. Evidence added

    Guarantee period (yrs)

    Before
    Not previously recorded
    After
    25
    No direct source binding recorded
  59. Evidence added

    Manufacturing track record: Evidence sources

    Before
    Not previously recorded
    After
    No direct source binding recorded
  60. Evidence added

    First-year degradation (%)

    Before
    Not previously recorded
    After
    1.0
    No direct source binding recorded
  61. Evidence added

    Verified reliability: Evidence sources

    Before
    Not previously recorded
    After
    No direct source binding recorded
  62. Evidence added

    Guaranteed end-of-warranty output (%): Evidence sources

    Before
    Not previously recorded
    After
    No direct source binding recorded
  63. Evidence added

    NOCT (C): Evidence status

    Before
    Not previously recorded
    After
    estimated
    No direct source binding recorded
  64. Evidence removed

    Cell technology tier: Evidence status

    Before
    sourced
    After
    No longer recorded
    Primary datasheet
  65. Evidence added

    Annual degradation (%/yr): Evidence status

    Before
    Not previously recorded
    After
    estimated
    No direct source binding recorded
  66. Record updated

    End-of-life & recycling disclosure: Evidence sources

    Before
    https://www.pv-tech.org/seia-launches-new-pv-recycling-program/
    After
    End-of-life & recycling disclosuresuperseded
  67. Evidence added

    Encapsulation & frame construction

    Before
    Not previously recorded
    After
    Glass-backsheet (standard or unspecified backsheet)
    No direct source binding recorded
  68. Evidence added

    Low-light / IAM coefficient: Evidence sources

    Before
    Not previously recorded
    After
    No direct source binding recorded
  69. Evidence added

    Guarantee period (yrs): Evidence status

    Before
    Not previously recorded
    After
    estimated
    No direct source binding recorded
  70. Record updated

    Durability (verified) pillar score

    Before
    69.5
    After
    60.7
    Primary datasheet
  71. Evidence added

    Annual degradation (%/yr): Evidence sources

    Before
    Not previously recorded
    After
    No direct source binding recorded
  72. Evidence added

    Warranty transferability: Evidence sources

    Before
    Not previously recorded
    After
    No direct source binding recorded
  73. Evidence added

    Guaranteed end-of-warranty output (%): Evidence status

    Before
    Not previously recorded
    After
    estimated
    No direct source binding recorded
  74. Record updated

    Fire classification (IEC 61730): Evidence status

    Before
    sourced
    After
    not_found
    Fire classification (IEC 61730)superseded
  75. Record updated

    Negative loading (MQT16, Pa): Evidence sources

    Before
    https://es-media-prod.s3.amazonaws.com/media/components/panels/spec-sheets/Panasonic_EVERVOLT_EVPV430_420HK2_Data_Sheet_1.pdf
    After
    Fire classification (IEC 61730)superseded
  76. Record updated

    Temp coefficient Pmax (%/C): Evidence sources

    Before
    https://www.solarelectricsupply.com/panasonic-evervolt-evpv420hk2-blk-420w-solar-panel
    After
    Primary datasheet
  77. Record updated

    Guarantee assurance: Evidence sources

    Before
    https://www.solarelectricsupply.com/panasonic-evervolt-evpv420hk2-blk-420w-solar-panel
    After
    Primary datasheet
  78. Evidence added

    NOCT (C)

    Before
    Not previously recorded
    After
    43
    No direct source binding recorded
  79. Record updated

    Negative loading (MQT16, Pa): Evidence status

    Before
    sourced
    After
    not_found
    Fire classification (IEC 61730)superseded
  80. Evidence added

    Encapsulation & frame construction: Evidence sources

    Before
    Not previously recorded
    After
    No direct source binding recorded
  81. Evidence added

    Cell architecture: Evidence sources

    Before
    Not previously recorded
    After
    No direct source binding recorded
  82. Evidence added

    Financial strength & warranty backing: Evidence status

    Before
    Not previously recorded
    After
    estimated
    No direct source binding recorded
  83. Evidence added

    Carbon footprint / EPD: Evidence sources

    Before
    Not previously recorded
    After
    No direct source binding recorded
  84. Record updated

    Independent energy yield: Evidence status

    Before
    reviewed_absence
    After
    estimated
    Independent energy yieldIndependent energy yield+2 in JSON record
  85. Evidence removed

    Cell technology tier: Evidence sources

    Before
    https://www.solarelectricsupply.com/panasonic-evervolt-evpv420hk2-blk-420w-solar-panel
    After
    No longer recorded
    Primary datasheet
5 changes to this record · 28 products changed in this update
  1. Evidence added

    IN Certifications

    Before
    Not previously recorded
    After
    The exact scored model EVPV430HK2-BLK is not named on ALMM List-I revision 03.08.2026. Cited source_version in-almm-module-2026-08-03-ffdfc4d1f767.
    IN market evidenceIN market evidence
  2. Record updated

    Source revision

    Before
    Panasonic EVERVOLT HK2 RS23184DS-R6, EVPV420/430HK2
    After
    Panasonic EVERVOLT HK2 RS23184DS-R6, EVPV420/430HK2. India existing-catalogue panel ALMM review 2026-09-02: IN overlays recorded against List-I revision 03.08.2026; scores unchanged.
    Primary datasheet
  3. Evidence added

    IN Support Note

    Before
    Not previously recorded
    After
    The exact scored model EVPV430HK2-BLK is not named on ALMM List-I revision 03.08.2026. ALMM is a domestic-content and procurement instrument; absence is not a quality finding and does not change the global score. A manufacturer catalogue is not a substitute for List-I. Existing AU, US, DE or EU warranty terms are not transferred.
    IN market evidenceIN market evidence
  4. Evidence added

    IN Evidence sources

    Before
    Not previously recorded
    After
    https://cdnbbsr.s3waas.gov.in/s3716e1b8c6cd17b771da77391355749f3/uploads/2026/08/202608031426164762.pdf; https://mnre.gov.in/en/approved-list-of-models-and-manufacturers-almm/
    IN market evidenceIN market evidence
  5. Evidence added

    IN Status

    Before
    Not previously recorded
    After
    unavailable
    IN market evidenceIN market evidence
4 changes to this record · 118 products changed in this update
  1. Evidence added

    Independent energy yield: Evidence status

    Before
    Not previously recorded
    After
    reviewed_absence
    Independent energy yieldIndependent energy yield+2 in JSON record
  2. Record updated

    Efficiency & Yield pillar score

    Before
    52.2
    After
    50.1
    Primary datasheet
  3. Evidence added

    Independent energy yield: Evidence sources

    Before
    Not previously recorded
    After
    https://scorecard.pvel.com/methodology/; https://scorecard.pvel.com/top-performers/; https://scorecard.pvel.com/wp-content/uploads/2022-PVEL-PV-Module-Reliability-Scorecard-Summary.pdf; https://scorecard.pvel.com/wp-content/uploads/2024-PV-Module-Reliability-Scorecard.pdf
    Independent energy yieldIndependent energy yield+2 in JSON record
  4. Evidence added

    Independent energy yield

    Before
    Not previously recorded
    After
    No public independent yield result found in reviewed sources
    Independent energy yieldIndependent energy yield+2 in JSON record
1 change to this record · 106 products changed in this update
  1. Record updated

    Durability (verified) pillar score

    Before
    69.6
    After
    69.5
    Primary datasheet

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. IN market evidence checked
  3. Series benchmark evidence checked
  4. AU market evidence checked
  5. Legacy product record archived
  6. Plain-language warranty summary checked

Evidence record (JSON)

Scored by Solar Analytica Research

Further reading from Findings

Stay across the benchmark.

New scorecards, score changes and market signals, published as they happen.