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Compare like with like. Aligned scores, specifications and local evidence within one scoring class or tier.

Market context

Global benchmark

Performance & Value

PowerQ EQ4000

FoxESS

68/ 100

Very good

Strong evidence coverage · 69%

Evidence checked 2026-07-27

LFP12yr+ Warranty
Full scorecard
Performance & Value

Smile G3 S5

AlphaESS

78/ 100

Superior

Moderate evidence coverage · 58%

Evidence checked 2026-07-16

LFPUL9540AVPP-Ready
Full scorecard
Side by side

Score profile

MeasurePowerQ EQ4000Smile G3 S5
Capacity & Usability84 / 10086 / 100
Power & Efficiency78 / 10080 / 100
Longevity (verified)60 / 10070 / 100
Safety & Chemistry80 / 10087 / 100
Guarantee & Backbone58 / 10078 / 100
Energy Ecosystem50 / 10067 / 100

Capacity & Usability

PowerQ EQ4000
84 / 100
Smile G3 S5
86 / 100

Power & Efficiency

PowerQ EQ4000
78 / 100
Smile G3 S5
80 / 100

Longevity (verified)

PowerQ EQ4000
60 / 100
Smile G3 S5
70 / 100

Safety & Chemistry

PowerQ EQ4000
80 / 100
Smile G3 S5
87 / 100

Guarantee & Backbone

PowerQ EQ4000
58 / 100
Smile G3 S5
78 / 100

Energy Ecosystem

PowerQ EQ4000
50 / 100
Smile G3 S5
67 / 100
Side by side

Key specifications

MeasurePowerQ EQ4000Smile G3 S5
Published usable capacity range7.16–25.04 kWh8.2–60.5 kWh
Scored benchmark7.16 kWh9.6 kWh
ChemistryLFPLFP
Power3.8 kW5 kW
Round-trip95 %95 %
Cycle lifeNot recorded10,000 cycles

Published usable capacity range

PowerQ EQ4000
7.16–25.04 kWh
Smile G3 S5
8.2–60.5 kWh

Scored benchmark

PowerQ EQ4000
7.16 kWh
Smile G3 S5
9.6 kWh

Chemistry

PowerQ EQ4000
LFP
Smile G3 S5
LFP

Power

PowerQ EQ4000
3.8 kW
Smile G3 S5
5 kW

Round-trip

PowerQ EQ4000
95 %
Smile G3 S5
95 %

Cycle life

PowerQ EQ4000
Not recorded
Smile G3 S5
10,000 cycles
Decision snapshot

Where the comparison separates

OverallSmile G3 S5 leads the global score by 10 points.
Strongest dimensionsPowerQ EQ4000: Capacity & Usability · Smile G3 S5: Safety & Chemistry
Largest differenceSmile G3 S5 has the largest pillar edge in Guarantee & Backbone (20 points).
Evidence coveragePowerQ EQ4000: strong evidence coverage (69%) · Smile G3 S5: moderate evidence coverage (58%)

A score lead is only meaningful inside this shared class or tier. Weigh it against the specification and evidence rows above before deciding.

Both products are scored in the Performance & Value class, on the same rubric weighting. Scores are not comparable across classes or tiers. Full methodology.