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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

Whispr 13.37

PowerPlus Energy

64/ 100

Good

Strong evidence coverage · 100%

Evidence checked 2026-07-31

LFP5 kWh Modular
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

MeasureWhispr 13.37Smile G3 S5
Capacity & Usability85 / 10086 / 100
Power & Efficiency62 / 10080 / 100
Longevity (verified)60 / 10070 / 100
Safety & Chemistry78 / 10087 / 100
Guarantee & Backbone49 / 10078 / 100
Energy Ecosystem52 / 10067 / 100

Capacity & Usability

Whispr 13.37
85 / 100
Smile G3 S5
86 / 100

Power & Efficiency

Whispr 13.37
62 / 100
Smile G3 S5
80 / 100

Longevity (verified)

Whispr 13.37
60 / 100
Smile G3 S5
70 / 100

Safety & Chemistry

Whispr 13.37
78 / 100
Smile G3 S5
87 / 100

Guarantee & Backbone

Whispr 13.37
49 / 100
Smile G3 S5
78 / 100

Energy Ecosystem

Whispr 13.37
52 / 100
Smile G3 S5
67 / 100
Side by side

Key specifications

MeasureWhispr 13.37Smile G3 S5
Published nominal capacity range13.37 kWhNot stated
ChemistryLFPLFP
Power7.0 kW5 kW
Round-tripNot recorded95 %
Cycle lifeNot recorded10,000 cycles
Published usable capacity rangeNot stated8.2–60.5 kWh
Scored benchmarkNot stated9.6 kWh

Published nominal capacity range

Whispr 13.37
13.37 kWh
Smile G3 S5
Not stated

Chemistry

Whispr 13.37
LFP
Smile G3 S5
LFP

Power

Whispr 13.37
7.0 kW
Smile G3 S5
5 kW

Round-trip

Whispr 13.37
Not recorded
Smile G3 S5
95 %

Cycle life

Whispr 13.37
Not recorded
Smile G3 S5
10,000 cycles

Published usable capacity range

Whispr 13.37
Not stated
Smile G3 S5
8.2–60.5 kWh

Scored benchmark

Whispr 13.37
Not stated
Smile G3 S5
9.6 kWh
Decision snapshot

Where the comparison separates

OverallSmile G3 S5 leads the global score by 14 points.
Strongest dimensionsWhispr 13.37: Capacity & Usability · Smile G3 S5: Safety & Chemistry
Largest differenceSmile G3 S5 has the largest pillar edge in Guarantee & Backbone (29 points).
Evidence coverageWhispr 13.37: strong evidence coverage (100%) · 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.