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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

ECS CQ7

FoxESS

69/ 100

Very good

Limited evidence coverage · 10%

Evidence checked 2026-06-20

LFP
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

MeasureECS CQ7Smile G3 S5
Capacity & Usability76 / 10086 / 100
Power & Efficiency68 / 10080 / 100
Longevity (verified)67 / 10070 / 100
Safety & Chemistry80 / 10087 / 100
Guarantee & Backbone62 / 10078 / 100
Energy Ecosystem58 / 10067 / 100

Capacity & Usability

ECS CQ7
76 / 100
Smile G3 S5
86 / 100

Power & Efficiency

ECS CQ7
68 / 100
Smile G3 S5
80 / 100

Longevity (verified)

ECS CQ7
67 / 100
Smile G3 S5
70 / 100

Safety & Chemistry

ECS CQ7
80 / 100
Smile G3 S5
87 / 100

Guarantee & Backbone

ECS CQ7
62 / 100
Smile G3 S5
78 / 100

Energy Ecosystem

ECS CQ7
58 / 100
Smile G3 S5
67 / 100
Side by side

Key specifications

MeasureECS CQ7Smile G3 S5
Published usable capacity range6.96–28.8 kWh8.2–60.5 kWh
Scored benchmark6.96 kWh9.6 kWh
ChemistryLFPLFP
Power5.0 kW5 kW
Round-trip94 %95 %
Cycle life6,000 cycles10,000 cycles

Published usable capacity range

ECS CQ7
6.96–28.8 kWh
Smile G3 S5
8.2–60.5 kWh

Scored benchmark

ECS CQ7
6.96 kWh
Smile G3 S5
9.6 kWh

Chemistry

ECS CQ7
LFP
Smile G3 S5
LFP

Power

ECS CQ7
5.0 kW
Smile G3 S5
5 kW

Round-trip

ECS CQ7
94 %
Smile G3 S5
95 %

Cycle life

ECS CQ7
6,000 cycles
Smile G3 S5
10,000 cycles
Decision snapshot

Where the comparison separates

OverallSmile G3 S5 leads the global score by 9 points.
Strongest dimensionsECS CQ7: Safety & Chemistry · Smile G3 S5: Safety & Chemistry
Largest differenceSmile G3 S5 has the largest pillar edge in Guarantee & Backbone (16 points).
Evidence coverageECS CQ7: limited evidence coverage (10%) · 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.