Battery · ENPHASE

ENPHASE IQ Battery 5P with FlexPhase IQBATTERY-5P-3P-INT-1.65-1P (AS4777-2 2020)

CEC approved · July 2025

Usable capacity: 5 kWh
Nominal capacity: 5 kWh
Continuous power: 3.84 kW
Peak power: 3.84 kW

Value score

61/100

Good value

Solid specifications — a good choice for most homes.

Usable capacity (DOD)15/15

100% DOD - Full capacity is usable

Warranty & terms13/20

15yr | 70% retention - Good warranty coverage

Round-trip efficiency8/15

90% efficiency - Above average (below mid-range tier standard of 92%)

Cycle life12/15

Documents

Specs verified 2026-09-10

6,000 cycles - Excellent longevity

Degradation3/10

3%/year degradation - Moderate capacity loss (exceeds mid-range tier max of 2.5%/yr)

Value for money5/10

Price per kWh not available

Heat tolerance (Perth)5/15

Temperature specs not available — scored conservatively for Perth climate

What this means

DOD exceeds tier expectations
Warranty throughput not specified - check terms before purchase
Degradation rate not specified — scored conservatively
No temperature data available — critical for Perth garage installations (40-50°C in summer)

Scored independently from manufacturer datasheets and the CEC register across usable capacity, warranty, efficiency, cycle life, degradation, value and heat tolerance. Missing specs are scored conservatively, never assumed.

Capacity & power

Usable capacityⓘ: 5 kWh
Nominal capacity: 5 kWh
Continuous power: 3.84 kW
Peak power: 3.84 kW

Warranty

Warranty period: 15 yrs

Chemistry & performance

Chemistry: LFP
Cycle life: 6000 cycles
Round-trip efficiencyⓘ: 90%
Depth of discharge: 100%

Capabilities

VPP ready: —
Backup capable: Yes
Expandable: Yes

Documents & provenance

Datasheet: PDF
Warranty document: PDF
Specs verified: Verified 2026-09-10

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About ENPHASE

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