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IP65
Venus-E 2.5kW Plug-In Storage System
MARSTEK VENUS-E AC-coupled home energy storage with a 5.12 kWh LiFePO4 battery, 2.5 kW on-grid charging and discharge, and 2.5 kW backup output. It supports CT-based anti-feed-in control, peak and off-peak energy shifting, Wi-Fi monitoring and RS485 energy-management integration.
Good to know: Using the battery as a plug-in unit, running appliances directly from its built-in socket, and having it fully wired into your fuseboard are three different setups — each with its own power limits. Read the plain-English guide.
Make more of your battery
Charge it free from the sun
Add a plug-in solar kit and your battery can store daytime solar for the evening. Tick to add — your battery stays in the order either way.
£1,499
Venus-E 2.5kW
£1,499
In stock · choose your delivery date at checkout
Sold and fulfilled by PowerXpress LTD, who take your payment and handle delivery, returns and warranty. Plug-In Solar (Plug In Battery Ltd) is their sales partner. Contact PowerXpress · PowerXpress Terms of Sale · Delivery · Returns · Privacy
Every order includes a free customer portal to track your order, follow delivery & installation, and download your receipt and documents — login sent by SMS the moment you order.
Features
- 5.12 kWh LiFePO4 battery per unit
- Scalable up to 15.36 kWh
- 800 W plug-in output, 2.5 kW when installed
- Built-in 2,400 W 13 A socket for direct appliance use
- AC-coupled: charges from the mains, works alongside existing solar
- Wi-Fi and Bluetooth control in the Marstek app
- Optional smart meter for home-first operation
- IP65 rated for indoor or outdoor installation
- 6,000+ cycles at 90% depth of discharge
- 10-year manufacturer warranty
Key Advantages
- Buy the unit alone or bundled with batteries
- Plug-in setup — no rewiring
- Optional smart meter install for live demand following
- Full professional installation available
What's in the box
- Marstek Venus E battery unit(s)
- Wall bracket and fixings
- Mains plug-in cable
Technical Specifications
Product Details
- EAN Code
- 3800170228863
Key Specifications
- Input Power
- 2.5kW
- PF
- > 0.99 (Default) / 0.8 leading ~ 0.8 lagging (Adjustable)
- Battery Type
- LiFePO₄
- Operation Temperature
- -20°C ~ +60°C
- IP Rating
- IP65
General
- Brand Name
- Marstek
- Model
- MST-BIE5-2500
- On-grid Connection Standard
- VDE 4105/0124,TOR R25, NF EN50549~10,C10/110,UNE217001/217002,NTS 631,CEl0-21,PETREE,PN-EN 50549-1/-2
- Regulatory/EMC
- IEC/EN 62109-1/-2,IEC/EN 61000-6-1/-2-/3-/4,IEC/EN 61000-3-2/-3,EN 300 328,ΕΝ 301 489-1/-17, EN 50665,EN 62920,CB 62619, EN 50549-1
- Warranty
- 10 Years
Color & Material
- Unit Color
- Black
Sensors & Connectivity
- Wifi
- WIFI & RS485 (Waterproof aviation plug)
Energy Source
- Inverter Power
- 2.5kW
- Battery Storage(kWh)
- 5.12–15.36kWh (5.12, 10.24 or 15.36kWh)
- Rated Off-grid Output Power
- 2.5kW
- Max. Apparent Output Power
- 2.5kVA
- Rated Output Voltage Frequency
- 50Hz/60Hz
- Nominal Voltage (Vdc)
- 51.2V (16S)
- Grid Voltage Range
- 187V~253V
- Rated Grid Frequency
- 50Hz / 60Hz
- Rated Grid Input/Output Current
- 11.4A / 10.9A
- Max. Input/Output Current
- 13.4A
- No: Of Phases
- L / N / PE
- THDi
- <3%
- THDu (Linear Load)
- <3%
- Overload Protection
- No
- Overvoltage/Voltage Withstand Level
- DC II / AC III
- Protection Level
- I
- Isolation Type
- Non-Insulated
- Cooling Strategy
- Natural Convection
- Max. Operating Altitude
- 2000m
- Relative Humidity
- 0–95%
- Display
- LED
- Cycle Life
- 6,000+ cycles at 90% DoD
Dimension & Weights
- Dimension
- 227 x 600 x 742 mm per unit
- Length (Item) mm
- 227
- Width (Item) mm
- 600
- Height (Item) mm
- 742
- Gross Weight (Kgs)
- 60.5 per unit
Packing
- Packing Dimension
- 600 x 742 x 227 mm
Downloads & Documentation
MARSTEK VENUS-E — Product Brochure & Datasheet
venus-e-brochure.pdf
Marstek Venus E — video guide
YouTube video
Venus E3 User Manual
Venus_E3_User_Manual.pdf
Venus E3 APP Manual
Venus_E3_APP_Manual.pdf
Marstek app — App Guide & Setup
YouTube video
Marstek app — Add Your Device
YouTube video
Marstek app — Update Firmware
YouTube video
Marstek app — Reset Password
YouTube video
Have Questions? Get in Touch
Got questions? Email us
sales@plug-insolar.co.ukOr tap the chat icon bottom-right — we'll get straight back to you.