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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

Battery-Box Premium HVM

BYD

68/ 100

Very good

Strong evidence coverage · 100%

Evidence checked 2026-07-27

LFP100% Usable15+ Yrs Field-Proven5 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

MeasureBattery-Box Premium HVMSmile G3 S5
Capacity & Usability94 / 10086 / 100
Power & Efficiency78 / 10080 / 100
Longevity (verified)54 / 10070 / 100
Safety & Chemistry73 / 10087 / 100
Guarantee & Backbone77 / 10078 / 100
Energy Ecosystem45 / 10067 / 100

Capacity & Usability

Battery-Box Premium HVM
94 / 100
Smile G3 S5
86 / 100

Power & Efficiency

Battery-Box Premium HVM
78 / 100
Smile G3 S5
80 / 100

Longevity (verified)

Battery-Box Premium HVM
54 / 100
Smile G3 S5
70 / 100

Safety & Chemistry

Battery-Box Premium HVM
73 / 100
Smile G3 S5
87 / 100

Guarantee & Backbone

Battery-Box Premium HVM
77 / 100
Smile G3 S5
78 / 100

Energy Ecosystem

Battery-Box Premium HVM
45 / 100
Smile G3 S5
67 / 100
Side by side

Key specifications

MeasureBattery-Box Premium HVMSmile G3 S5
Published usable capacity range8.28–22.08 kWh8.2–60.5 kWh
Scored benchmark8.28 kWh9.6 kWh
ChemistryLFPLFP
Power7.65 kW5 kW
Round-trip96 %95 %
Cycle lifeNot recorded10,000 cycles

Published usable capacity range

Battery-Box Premium HVM
8.28–22.08 kWh
Smile G3 S5
8.2–60.5 kWh

Scored benchmark

Battery-Box Premium HVM
8.28 kWh
Smile G3 S5
9.6 kWh

Chemistry

Battery-Box Premium HVM
LFP
Smile G3 S5
LFP

Power

Battery-Box Premium HVM
7.65 kW
Smile G3 S5
5 kW

Round-trip

Battery-Box Premium HVM
96 %
Smile G3 S5
95 %

Cycle life

Battery-Box Premium HVM
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 dimensionsBattery-Box Premium HVM: Capacity & Usability · Smile G3 S5: Safety & Chemistry
Largest differenceSmile G3 S5 has the largest pillar edge in Energy Ecosystem (22 points).
Evidence coverageBattery-Box Premium HVM: 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.