MARSTEK Venus E Gen 3.0 Plug-in Battery 5.12kWh LFP 2.5kW AC Expandable to 15.36kWh with AI Mode
- Free delivery
- 14-day returns
- 2-year warranty
- Secure payment
Description
The MARSTEK Venus E Gen 3.0 is a plug-in battery with 5.12 kWh of LFP storage capacity and 2.5 kW of AC input and output, giving you smart energy management and lower running costs.
- 5.12 kWh of storage capacity, expandable to 7.5 kW / 15.36 kWh in single-phase operation → so you can add capacity flexibly as your energy needs grow, without having to replace the whole system
- 2.5 kW AC input and output with up to 2500 W of reliable backup power → keeps essential household appliances running during a power cut and gives you peace of mind in an emergency, without charging being too slow
- AI mode for smart energy management → automatically optimises your energy use and charge cycles so you cut your electricity costs without having to intervene manually
- 100% PV system compatibility with zero export via smart meter → integrates easily into existing solar installations and avoids exporting to the grid, so you use all the power you generate yourself
- LFP battery technology with over 6000 cycles, up to 15 years of service life and a 10-year warranty → works reliably for many years and lowers your long-term energy costs, with no worries about early battery wear
- IP65 rating and reliable operation across a wide temperature range → so you can use the battery outdoors all year round without any concerns about long-term durability
Perfect for homeowners and renters who want to cut electricity costs and build energy independence, and for anyone looking for a future-proof, expandable solution. Genuine product, as-new condition. The plug-in design means no complicated installation work – you can start straight away and benefit from higher savings through AI-driven energy management, with no technical expertise required.
Questions about this unit
Do I need to register this set?
Rules differ by country and network operator — check what applies where you are. In most markets a plug-in system is notified to the local grid operator, and the battery falls under the same notification as the solar it sits behind. The paperwork is included with the delivery.
Does the output rating breach the export limit?
No. Export limits apply to the power fed into your home wiring. In the manufacturer's app you set the export to whatever your market allows; the higher rated output is used for connected loads and for internal charging.
Can I add more batteries later?
On the modular units, yes. The extra pack stacks, connects with the supplied cable and is recognised in the app after a short firmware sync. No work on your home wiring is needed. The maximum configuration is listed in the technical data.
Can it stay outside in winter?
With IP65 and cell heating, yes: discharge down to −20 °C, charging from around 0 °C, with the heater covering the range below. Choose a rain-sheltered spot on a wall and leave clearance at the vents.
How long do the rated cycles last, and what does the warranty cover?
At roughly 250 to 300 full cycles a year, 6,000 cycles is more than 15 years of use down to 80 % remaining capacity. The manufacturer warranty is listed in the technical data; your statutory rights apply on top.
How is it installed, and do I need an electrician?
Panels plug in, the unit stands on a level surface or mounts with the supplied bracket, and it connects to a standard socket. The plug-in configuration does not require an electrician. For a fixed feed-in point or metering in the consumer unit, use a qualified electrician.