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MarstekVenus E 4.0

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The Marstek Venus E 4.0 is a home battery with charge power (continuous) 3 kW and cell chemistry LFP.¹

Last updated: 27 September 2026 Technical specifications Rules in Ireland ⇄ Compare this model

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Nominal capacity: 5.02kWh¹
Charge power (continuous): 3kW¹

Manufacturer data
Cell chemistry: LFP¹

Manufacturer data
Expandable up to: 15kWh¹

Manufacturer data
Discharge power (continuous): 3kW¹

Manufacturer data

Rules in Ireland

SEAI home battery grant

Unknown

A €600 grant for home battery storage systems was announced on 29 September 2026 and opens from 6 October 2026, subject to final implementation arrangements. Check SEAI for the detailed conditions before applying.

Technical specifications

General
Cell chemistry	LFP¹
Wi-Fi / app	Yes¹
Performance
Nominal capacity	5.02 kWh¹
Smallest configuration	5.02 kWh¹
Expandable up to	15 kWh¹
Charge power (continuous)	3 kW¹
Discharge power (continuous)	3 kW¹
Efficiency
Depth of discharge	88 %¹
Electrical
Backup power	Yes¹
Dimensions & weight
IP rating	IP65¹
Min. operating temperature	-20 °C¹
Weight	47.2 kg¹
Warranty & lifespan
Warranted cycles	10,000¹

Manufacturer documentation

Product page (marstekenergy.com, PDF)
Brochure / leaflet — MARSTEK VENUS E 4.0 – Brochure / Specifications – juni 2026 (cdn.shopify.com, PDF)

External links to Marstek's official website. The manufacturer may change or move documents; where they differ, the manufacturer's latest version applies.

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Frequently asked questions

What is the charge power (continuous) of the Marstek Venus E 4.0?

The charge power (continuous) of the Marstek Venus E 4.0 is 3 kW.¹

Which cell chemistry does the Marstek Venus E 4.0 use?

The cell chemistry of the Marstek Venus E 4.0 is LFP.¹

Sources

MARSTEK VENUS E 4.0 – Brochure / Specifications, juni 2026 — Marstek Energy Co., Limited · accessed 27 Sept 2026
SEAI home battery grant — Sustainable Energy Authority of Ireland (SEAI)

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