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

Market context

Global benchmark

Product AComparable product

Performance & Value

eVault MAX 18.518.43 kWh

Fortress Power | eVault MAX 18.5; California Energy Commission listing eVaultMax

LFPDC-coupled

70/ 100

Very good

Strong evidence coverage · 100%

Evidence checked 2026-08-05

LFP100% Usable97%+ Efficiency

Full scorecard

Performance & Value

Smile G3 S5 / BAT-10.1P9.6–57.6 kWh

AlphaESS | SMILE-G3-S5 with one SMILE-G3-BAT-10.1P; 9.6 kWh usable reference, 1-6 modules

LFPAll-in-oneSingle-phase

67/ 100

Very good

Strong evidence coverage · 100%

Evidence checked 2026-08-01

LFPVPP-Ready

Full scorecard

Side by side

Score profile

Measure	eVault MAX 18.5	Smile G3 S5 / BAT-10.1P
Capacity & Usability	90 / 100	82 / 100
Power & Efficiency	82 / 100	62 / 100
Longevity (verified)	62 / 100	65 / 100
Safety & Chemistry	66 / 100	75 / 100
Guarantee & Backbone	64 / 100	62 / 100
Energy Ecosystem	62 / 100	58 / 100

Capacity & Usability

eVault MAX 18.5: 90 / 100
Smile G3 S5 / BAT-10.1P: 82 / 100

Power & Efficiency

eVault MAX 18.5: 82 / 100
Smile G3 S5 / BAT-10.1P: 62 / 100

Longevity (verified)

eVault MAX 18.5: 62 / 100
Smile G3 S5 / BAT-10.1P: 65 / 100

Safety & Chemistry

eVault MAX 18.5: 66 / 100
Smile G3 S5 / BAT-10.1P: 75 / 100

Guarantee & Backbone

eVault MAX 18.5: 64 / 100
Smile G3 S5 / BAT-10.1P: 62 / 100

Energy Ecosystem

eVault MAX 18.5: 62 / 100
Smile G3 S5 / BAT-10.1P: 58 / 100

Side by side

Key specifications

Measure	eVault MAX 18.5	Smile G3 S5 / BAT-10.1P
Published usable capacity range	18.43 kWh	9.6–57.6 kWh
Chemistry	LFP	LFP
Power	9.2 kW	5 kW
Round-trip	98 %	Not recorded
Cycle life	8,000 cycles	Not recorded
Scored benchmark	Not stated	9.6 kWh

Published usable capacity range

eVault MAX 18.5: 18.43 kWh
Smile G3 S5 / BAT-10.1P: 9.6–57.6 kWh

Chemistry

eVault MAX 18.5: LFP
Smile G3 S5 / BAT-10.1P: LFP

Power

eVault MAX 18.5: 9.2 kW
Smile G3 S5 / BAT-10.1P: 5 kW

Round-trip

eVault MAX 18.5: 98 %
Smile G3 S5 / BAT-10.1P: Not recorded

Cycle life

eVault MAX 18.5: 8,000 cycles
Smile G3 S5 / BAT-10.1P: Not recorded

Scored benchmark

eVault MAX 18.5: Not stated
Smile G3 S5 / BAT-10.1P: 9.6 kWh

Decision snapshot

Where the comparison separates

OveralleVault MAX 18.5 leads the global score by 3 points.

Strongest dimensionseVault MAX 18.5: Capacity & Usability · Smile G3 S5 / BAT-10.1P: Capacity & Usability

Largest differenceeVault MAX 18.5 has the largest pillar edge in Power & Efficiency (20 points).

Evidence coverageeVault MAX 18.5: strong evidence coverage (100%) · Smile G3 S5 / BAT-10.1P: strong evidence coverage (100%)

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.