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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

TSYS-HS51

SolaX

70/ 100

Very good

Strong evidence coverage · 100%

Evidence checked 2026-07-26

LFP100% UsableVPP-Ready
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

MeasureTSYS-HS51Smile G3 S5
Capacity & Usability93 / 10086 / 100
Power & Efficiency69 / 10080 / 100
Longevity (verified)65 / 10070 / 100
Safety & Chemistry78 / 10087 / 100
Guarantee & Backbone56 / 10078 / 100
Energy Ecosystem62 / 10067 / 100

Capacity & Usability

TSYS-HS51
93 / 100
Smile G3 S5
86 / 100

Power & Efficiency

TSYS-HS51
69 / 100
Smile G3 S5
80 / 100

Longevity (verified)

TSYS-HS51
65 / 100
Smile G3 S5
70 / 100

Safety & Chemistry

TSYS-HS51
78 / 100
Smile G3 S5
87 / 100

Guarantee & Backbone

TSYS-HS51
56 / 100
Smile G3 S5
78 / 100

Energy Ecosystem

TSYS-HS51
62 / 100
Smile G3 S5
67 / 100
Side by side

Key specifications

MeasureTSYS-HS51Smile G3 S5
Published usable capacity range10.2–66.5 kWh8.2–60.5 kWh
Scored benchmark10.2 kWh9.6 kWh
ChemistryLFPLFP
Power6.1 kW5 kW
Round-tripNot recorded95 %
Cycle life6,000 cycles10,000 cycles

Published usable capacity range

TSYS-HS51
10.2–66.5 kWh
Smile G3 S5
8.2–60.5 kWh

Scored benchmark

TSYS-HS51
10.2 kWh
Smile G3 S5
9.6 kWh

Chemistry

TSYS-HS51
LFP
Smile G3 S5
LFP

Power

TSYS-HS51
6.1 kW
Smile G3 S5
5 kW

Round-trip

TSYS-HS51
Not recorded
Smile G3 S5
95 %

Cycle life

TSYS-HS51
6,000 cycles
Smile G3 S5
10,000 cycles
Decision snapshot

Where the comparison separates

OverallSmile G3 S5 leads the global score by 8 points.
Strongest dimensionsTSYS-HS51: Capacity & Usability · Smile G3 S5: Safety & Chemistry
Largest differenceSmile G3 S5 has the largest pillar edge in Guarantee & Backbone (22 points).
Evidence coverageTSYS-HS51: 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.