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Premium Integrated

IQ Battery 5P FlexPhase

5 kWh · LFP · AC-coupled

Enphase

68/ 100

Very good

Global

LFPUL9540A100% Usable15yr Warranty

The verdict. In our Premium Integrated class, Enphase IQ Battery 5P FlexPhase leads on capacity & usability. Home-battery reliability is rarely independently verified, so judge on chemistry, safety certification and the backing company.

6thof 13 in Premium IntegratedTop halfclass average 64.9
Compare this battery →Ask Watt →

The assessment

How it scores, by category

Capacity & Usability91
Power & Efficiency70
Longevity (verified)68
Safety & Chemistry74
Guarantee & Backbone61
Energy Ecosystem47

Market position

6thof 13 in Premium IntegratedTop half
516876

Our reading

IQ Battery 5P FlexPhase scores 68, placing 6 of 13 in the Premium Integrated class against a class average of 64.9. Its strongest scoring dimension is capacity & usability (91), running 16.3 points above the class average on this dimension. Energy Ecosystem scores 47, the lowest pillar for this product. The class average on energy ecosystem is 51. Key specifications: LFP, 96% round-trip efficiency.

The data

Chemistry
LFP
Power
Not recorded
Round-trip
96%
Cycle life
Not recorded
Technology architecture

AC-coupled battery

Architecture guide

Includes battery-side power conversion and connects on the household AC side.

Product role
The battery product includes its own conversion stage, while site isolation and backup controls may remain separate.
Published range
5 kWh
Phase
Not recorded
Backup boundary
Installation-specific
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.

01Backup0 published · 0 reviewed absence · 0 not applicable · 4 open02Digital control1 published · 0 reviewed absence · 0 not applicable · 3 open03Battery behaviour10 published · 1 reviewed absence · 0 not applicable · 4 open06Service pathway6 published · 0 reviewed absence · 0 not applicable · 0 open

Usable capacity

100% of this battery’s nominal capacity is usable, 5 kWh in the scored configuration.

5 kWh usableScored configuration: IQBATTERY-5P-3P-INT.

No reserve is withheld at the stated depth of discharge.

At a sourced 100% depth of discharge the usable and nominal figures are the same number, so no separate nominal capacity is stated.

Usable capacity sourceDepth-of-discharge source 1Depth-of-discharge source 2

Capacity guarantee: minimum retained at year 15

5.0 kWhfull3.0at yr 15
5060708090100Rated capacity 100%Guaranteed floor 60.0%Typical 10yr60.0%0yr5yr10yr15yr
Rated capacity (reference)Guaranteed floor: 60.0% at yr 15Typical battery warranty term: 10 yr

No year-by-year capacity schedule is published for this product - the manufacturer guarantees only this end-of-term minimum, not a specific decline curve. Capacity figure based on the sourced usable capacity of the base configuration; modular systems scale with additional modules.

Before you buy
Local positionUse a market view to check local availability, approvals and warranty scope.
Ask the installerWhat usable capacity, backup power and warranted operating conditions will the installed IQ Battery 5P FlexPhase configuration deliver?

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 uses the exact reviewed reference configuration; larger stacks do not receive a capacity-size advantage. Scored model: IQBATTERY-5P-3P-INT · checked 2026-08-08. Evidence.

Sources & references · checked 2026-08-10

Strong evidence coverage

15 of 15 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. AU/NZ FlexPhase datasheet DSH-00745-3.0 dated 7 July 2025, Australia and New Zealand storage warranty effective 15 June 2025, and CER exports data as at 29 July 2026

Change ledger

Product record history

23 changes to this record · 78 products changed in this update
  1. Evidence added

    Round-trip efficiency (%)

    Before
    Not previously recorded
    After
    96
    Primary datasheet
  2. Evidence added

    Round-trip efficiency (%): Evidence sources

    Before
    Not previously recorded
    After
    https://enphase.com/en-gb/media/26011
    Primary datasheet
  3. Evidence added

    State

    Before
    Not previously recorded
    After
    supported
    Warranty throughputPrimary datasheet
  4. Evidence added

    Value

    Before
    Not previously recorded
    After
    Reviewed 2026-08-25: the exact AU/NZ FlexPhase datasheet publishes 96% DC round-trip efficiency. Its separate 90% AC-to-battery-to-AC result is retained as contextual pathway evidence.
    Warranty throughputPrimary datasheet
  5. Evidence added

    Value

    Before
    Not previously recorded
    After
    The Australian warranty ends at the earlier of 15 years or 6,000 discharged cycles and guarantees 60% capacity at year 15. It is not a measured cycles-to-70% result.
    Warranty throughputPrimary datasheet
  6. Evidence added

    Confidence

    Before
    Not previously recorded
    After
    high
    Warranty throughputPrimary datasheet
  7. Evidence added

    State

    Before
    Not previously recorded
    After
    supported
    Warranty throughputPrimary datasheet
  8. Evidence added

    State

    Before
    Not previously recorded
    After
    reviewed_absence
    Warranty throughputPrimary datasheet
  9. Evidence added

    State

    Before
    Not previously recorded
    After
    supported
    Warranty throughputPrimary datasheet
  10. Evidence added

    Round-trip efficiency (%): Evidence status

    Before
    Not previously recorded
    After
    sourced
    Primary datasheet
  11. Record updated

    Global score

    Before
    64.1
    After
    67.8
    Primary datasheet
  12. Evidence added

    Confidence

    Before
    Not previously recorded
    After
    high
    Warranty throughputPrimary datasheet
  13. Evidence added

    Evidence sources

    Before
    Not previously recorded
    After
    https://enphase.com/en-au/download/2025-06-15-enphase-energy-limited-warranty-5p-batteryanz; https://enphase.com/en-gb/media/26011
    Warranty throughputPrimary datasheet
  14. Evidence added

    Value

    Before
    Not previously recorded
    After
    Reviewed 2026-08-25: The Australian warranty ends at the earlier of 15 years or 6,000 discharged cycles and guarantees 60% capacity at year 15. It is not a measured cycles-to-70% result. No cycles-to-70% value is substituted into the score.
    Warranty throughputPrimary datasheet
  15. Evidence added

    Evidence sources

    Before
    Not previously recorded
    After
    https://enphase.com/en-gb/media/26011
    Warranty throughputPrimary datasheet
  16. Record updated

    Name Rating

    Before
    Good
    After
    Very Good
    Primary datasheet
  17. Evidence added

    Evidence sources

    Before
    Not previously recorded
    After
    https://enphase.com/en-au/download/2025-06-15-enphase-energy-limited-warranty-5p-batteryanz; https://enphase.com/en-gb/media/26011
    Warranty throughputPrimary datasheet
  18. Evidence added

    Evidence sources

    Before
    Not previously recorded
    After
    https://enphase.com/en-gb/media/26011
    Warranty throughputPrimary datasheet
  19. Evidence added

    Confidence

    Before
    Not previously recorded
    After
    high
    Warranty throughputPrimary datasheet
  20. Record updated

    Power & Efficiency pillar score

    Before
    47
    After
    70.2
    Primary datasheet
  21. Evidence added

    Confidence

    Before
    Not previously recorded
    After
    high
    Warranty throughputPrimary datasheet
  22. Evidence added

    Value

    Before
    Not previously recorded
    After
    The exact AU/NZ FlexPhase datasheet publishes 90% AC-to-battery-to-AC round-trip efficiency at 50% rated power, 25 C and beginning of life.
    Warranty throughputPrimary datasheet
  23. Record updated

    Rating

    Before
    Good
    After
    Very good
    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. AU market evidence checked
  3. Plain-language warranty summary checked
  4. 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 batteries, with quote questions and direct evidence coverage visible before you compare.

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