plug-in home battery · checked 2026-10-17
Marstek VENUS E 3.0
A 5.12 kWh AC-coupled home battery listed by Marstek Direct UK. The distributor requires a dedicated hardwired connection and quotes an 800W default UK grid output. Model-specific grid registration and the supplied backup outlet still need confirmation before purchase.
- Stated storage
- 5.12 kWh
- Connection
- UK connection unconfirmed
Price snapshot
£1,399.99
Marstek VENUS E 3.0 base unit listed at £1,399.99 at Marstek Direct UK, including VAT. Available to order when checked 17 October 2026. Installation, required accessories, panels and extra batteries are separate. Check the current price and dispatch estimate before ordering.
Source: Marstek Direct UK · checked 2026-10-17
UK rules check
Still checking. The UK distributor requires a dedicated hardwired connection. The exact Gen 3 grid-registration reference, UK output configuration and supplied backup socket still need model-level confirmation.
Checked 2026-10-17
The UK distributor is the price and UK configuration source for this record. Obtain the manufacturer manual, verify the exact grid-registration match and supplied outlet format, and resolve the conflicting dimensions before specifying an installation.
Who it suits
- Researching AC-coupled home storage alongside STREAM and Solarbank
- A property where an installer can verify the exact UK model and configuration
- Buyers comparing a stated 5.12 kWh base unit with other 5 kWh systems
Who should skip it
- Anyone expecting to feed the home through a household socket
- A purchase before model-specific UK paperwork and backup outlet are confirmed
- Comparing 5.12 kWh nominal storage with another product’s measured usable AC energy
What you need
- Qualified installer to confirm the exact Gen 3 model and UK output configuration
- Dedicated hardwired connection following the product documents
- Correct metering, backup load arrangement and model-specific grid paperwork
- A stated 5.12 kWh base unit listed by a UK distributor
- AC-coupled approach for tariff or supported existing-solar use
- Distributor provides explicit UK hardwiring guidance
- Model-specific grid-registration reference is still being checked
- Distributor page has conflicting weight and dimension values, so these are omitted
- Backup outlet format and UK warranty terms require confirmation
Common questions
Can I plug the Venus E 3.0 into a UK household socket?
The UK distributor says the unit must be hardwired to a dedicated circuit or fused spur connected to the consumer unit. Do not treat generic plug-and-play advertising as approval for household-socket feed-in.
Has this page independently confirmed G98 approval?
No. The distributor lists a grid-register reference, but its match to the exact Gen 3 variant and output setting has not been independently confirmed here. Ask the installer for the model-specific documents.
Is 5.12 kWh the usable energy at my appliances?
It is stated battery capacity. Depth-of-discharge limits and inverter losses affect delivered energy. Do not use the nominal number as a verified AC-delivery figure.
Worth comparing with
Sources
- Marstek Direct UK distributor — exact VENUS E 3.0 product page, specifications and UK connection noteschecked 2026-10-17
- Marstek Direct UK — exact base-unit variant and dated pricechecked 2026-10-17