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Plug-in ESS

Venus E 4.0

3 kW

MARSTEKReleased 2026

60/ 100

Good

Global

LFP chemistryFast switching

The verdict. In our Plug-in ESS class, MARSTEK Venus E 4.0 leads on capacity & usability.

6thof 8 in Plug-in ESSLower halfclass average 62.3
Ask Watt →

The assessment

How it scores, by category

Capacity & Usability100
Output Power81
Longevity (verified)40
Safety & Chemistry55
Guarantee & Backbone52
Connectivity & Ecosystem35

Market position

6thof 8 in Plug-in ESSLower half
496071

Our reading

Venus E 4.0 scores 60, placing 6 of 8 in the Plug-in ESS class against a class average of 62.3. Its strongest scoring dimension is capacity & usability (100), running 8.2 points above the class average on this dimension. Connectivity & Ecosystem scores 35, the lowest pillar for this product. The class average on connectivity & ecosystem is 47.

The data

Backup
3.0kW
Switching
<20ms
Cycle life
Not recorded
Warranty
Not recorded
Before you buy
Local positionUse a market view to check local availability, approvals and warranty scope.
Ask the installerWhat usable capacity, backup power and warranted operating conditions will the installed Venus E 4.0 configuration deliver?

Verification & sources

Market context

Global evidencechange in the site menu

Global benchmark. This scorecard is benchmarked globally. A global score does not imply local availability, certification, warranty coverage, or installer compatibility.

Benchmark anchor. Scored model: Venus E 4.0 · checked 2026-07-14. Evidence.

Sources & references · checked 2026-07-29

Moderate evidence coverage

7 of 19 scored criteria link directly to a published source.

Values marked estimated, derived, or not found remain visible on the audit sheet and do not carry the same evidential weight as a linked source. Coverage measures direct links, not an independent guarantee that a claim is correct.

Evidence timeline

Recorded verification events for this scorecard. These are evidence checks, not historical score snapshots. No change to this product record has been published since the change ledger opened on 2026-08-16.

  1. Core scorecard evidence checked
  2. AU market evidence checked
  3. Series benchmark evidence checked
  4. Plain-language warranty summary checked

Evidence record (JSON)

Scored by Solar Analytica Research

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