Marstek Venus-E 5 kWh ESS Solar Battery – Plug & Play, Expandable, 10 Year Warranty

Marstek Venus-E 5 kWh ESS Solar Battery – High Performance Plug & Play

The Marstek Venus-E 5 kWh ESS solar battery is an innovative and scalable energy storage solution designed to maximize your solar self-consumption and secure your power supply in the event of a power outage. With its LiFePO₄ (lithium iron phosphate) technology and plug-and-play design, it's ideal for homes, businesses, RVs, boats, and vacation homes.

🔥 Special offer until 06/30 – 10-year manufacturer's warranty included!

⚙️ Main features:

• Capacity: 5.12 kWh
• Rated output power: 2.5 kVA (on-grid and off-grid)
• Technology: LiFePO₄ battery (6000+ cycles)
• Installation: 100% Plug & Play – no technical skills required
• Compatibility: Compatible with existing photovoltaic systems
• Expandable: Up to 30 kWh by adding modules
• Tracking: Smart management via Wi-Fi / Bluetooth / App
• Certification: IEC/EN 62109-1/-2, EN 50549-1, EN 50665, CB 62619, etc.
• Dimensions: 560 x 690 x 201 mm
• Weight: 60 kg

✅ Why choose the Marstek Venus-E?

• ✅ Ultra-fast installation: plug it in and it's ready to go!
• ✅ Longer lifespan: 10 years, 6000 cycles guaranteed
• ✅ Energy saving: optimize your solar self-consumption
• ✅ Versatility: home, business, camper, boat, remote site
• ✅ Easy extension: add modules as needed

📦 In stock – Limited quantities!

Due to current high demand, we recommend checking availability before ordering. Contact us for more information!

Marstek Venus E 5.12 kWh solar battery coupled in AC

The Marstek Venus-E 5 kWh solar battery is a particularly innovative and reliable energy storage solution for home and business photovoltaic installations. Incorporating advanced LiFePO₄ technology, this battery offers remarkable durability with more than 6,000 guaranteed cycles , stable long-term performance and enhanced safety thanks to its optimized thermal design. With a usable capacity of 5,120 Wh and an adaptable output power of up to 2,500 W in backup mode, it provides efficient and rapid backup power during power outages, essential for critical equipment. Its simple installation via a 230 V socket and its IP65 protection rating attest to its robustness, allowing it to be installed indoors or in an outdoor shelter, while its connected management via Wi-Fi, RS485 and a mobile application facilitates remote monitoring and control.

Marstek Venus-E 5 kWh Solar Battery: Technical Features and Key Benefits

LiFePO₄ technology: safety, longevity and performance of the Marstek Venus-E 5 kWh battery

The Marstek Venus-E battery's superiority comes from LiFePO₄ (Lithium Iron Phosphate) technology, renowned for its intrinsic safety and thermal stability, ensuring reliable use for more than 6,000 cycles . Unlike conventional lithium-ion batteries, this technology limits the risk of thermal runaway, ensuring maximum safety even under intensive use. LiFePO₄ cells offer significant longevity, which is backed by a 10-year manufacturer's warranty, thus reinforcing confidence in the long-term energy storage installation .

This technology also improves the overall performance of the battery by maintaining a stable capacity even after thousands of charges and discharges, thus meeting the expectations of users requiring reliable and sustainable power supply for their photovoltaic projects.

• High chemical and thermal stability

• Long-term durability with more than 6000 cycles guaranteed

• 10-year warranty for safe use

• Built-in overload and short circuit protection

Characteristic	Description
Technology	LiFePO₄
Lifetime	More than 6000 charge/discharge cycles
Guarantee	10 years
Security	Protection against overvoltage, short circuits, reinforced insulation

5120 Wh usable capacity, flexible output power and ultra-fast switching (15 ms)

The Marstek Venus-E battery offers an optimal capacity of 5120 Wh, which stores enough energy to power essential equipment during a power outage or off-grid use. Its nominal output power reaches 2500 W in backup mode, which becomes a particularly valuable asset for ensuring the continuous operation of sensitive devices. In connected mode, the power is 800 W, balancing consumption and autonomy.

A key advantage is the switching time of just 15 milliseconds when a power outage is detected, minimizing interruptions and protecting critical loads. The system is compatible with expansion of up to four modules in parallel, allowing for increased capacity and power output of up to 20 kWh and 10 kW, respectively.

• Useful capacity: 5120 Wh

• Output power: 2500 W (emergency) and 800 W (connected)

• Ultra-fast switching time: 15 ms

• Expandable up to 20 kWh and 10 kW

Setting	Value
Useful capacity	5120 Wh
Power output (standby)	2500 W
Output power (connected)	800 W
Switching time	15 ms

Plug & play installation on 230V socket: simplicity, modularity and robustness (IP65)

Marstek's Venus-E battery stands out for its remarkable simplicity: installation is carried out via a standard 230V household socket, without the need for complex electrical work. This plug & play principle makes it accessible to both individuals and professionals. This modularity allows several units to be connected in parallel, facilitating adaptation to changing energy needs over time.

The robust enclosure boasts an IP65 protection rating, allowing it to be installed indoors or outdoors (protected from direct water spray). Fanless passive cooling ensures quiet, maintenance-free operation. This design guarantees reliability and durability even in demanding environments.

• Direct connection to a 230 V domestic socket

• Modularity up to 4 batteries per phase

• IP65 robustness, protecting against dust and water splashes

• Passive cooling for quiet operation

Quiet operation and smart management via Wi-Fi, RS485 and mobile app

The Marstek Venus-E battery is intelligently managed through integrated Wi-Fi and RS485 interfaces. These technologies enable real-time performance tracking and remote monitoring through an intuitive application. This application facilitates the optimization of charge and discharge cycles based on solar production and domestic needs, while anticipating cumulative consumption.

A proactive notification system informs the user of any anomalies or potential optimizations, enhancing preventive maintenance. This digitalized control ensures efficient and cost-effective energy storage, thus enhancing the value of the solar investment.

• Integrated Wi-Fi and RS485 interfaces

• Dedicated mobile application for remote monitoring and control

• Real-time alerts and notifications

• Passive cooling, quiet operation

Uses of the Marstek Venus-E 5 kWh solar battery and compatibility with your photovoltaic installation

Backup power, autonomy for homes and businesses, off-grid solutions

This battery is suitable for a variety of use cases, from backup power for homes and businesses to off-grid stand-alone systems. For homes with photovoltaic installations, the Marstek Venus-E can store excess power to improve self-consumption, reducing reliance on the power grid.

In off-grid environments, such as campervans, remote homes, or small business premises, its ability to provide stable power becomes essential to ensure reliable autonomy. The system is also an asset for businesses looking to smooth out consumption peaks to optimize their energy costs.

• Backup power supply for critical equipment

• Extended energy autonomy for home and business

• Solutions adapted to off-network and nomadic sites

• Cost optimization by smoothing consumption peaks

Scalability up to 20 kWh and 10 kW to adapt to changing needs

The Marstek Venus-E battery's modular design allows for up to four modules to be connected in parallel per phase, multiplying the available capacity and power . This expandability ensures perfect adaptation to changing energy needs, whether to increase autonomy or power more demanding equipment.

A design office at watt+ recently confirmed that this parallel extension remains simple to implement thanks to the integrated communication bus, without complicating the installation . This flexibility makes the system a scalable and viable solution in the long term, in line with sustainable development projects.

• Up to 4 batteries in parallel

• Total capacity: up to 20 kWh

• Maximum combined power: 10 kW

• Extension possible without major electrical modification

Wide compatibility: solar panels, hybrid inverters and smart meters

Marstek Venus-E integrates easily with a wide range of photovoltaic equipment, including solar panels from various brands as well as hybrid inverters or microinverters. For precise energy management, it is compatible with smart meters such as the Shelly Pro 3EM or the CT-002, allowing precise control of energy flows and optimized storage management.

This interoperability with the main technologies on the market promotes full operation, perfectly adapted to the constraints and needs of each solar installation.

• Compatible with standard solar panels

• Support for hybrid inverters and microinverters

• Energy management via smart meters Shelly Pro 3EM, CT-002

• Improved tracking and steering accuracy

Compliance with European standards, anti-injection features and maximized safety

The Marstek battery offers strict compliance with European standards, particularly in terms of electrical and environmental safety . It incorporates protection against surges and short circuits, and ensures reinforced insulation, thus guaranteeing the regulatory compliance essential for any high-performance photovoltaic installation .

An anti-injection system also prevents energy from being re-injected into the grid, optimizing self-consumption and improving the overall profitability of solar storage. It is recommended that the installation be carried out on a properly grounded socket to maximize the safety and reliability of the device.

• Compliance with strict European standards

• Anti-injection functionality to maximize self-consumption

• Built-in surge and short circuit protections

• Grounding recommendation for optimal safety

Optimize your energy with the Marstek Venus-E 5 kWh: smart modes, savings and environmental impact

Manual, automatic and AI modes: optimization of charging, discharging and self-consumption

The battery allows for multi-mode management adapted to energy and economic requirements: a manual mode for direct control, an automatic mode that adjusts cycles according to consumption habits, and finally a mode optimized by artificial intelligence. This AI analyzes weather data, tariffs and photovoltaic production in real time to adapt charging and discharging to maximize self-consumption and reduce losses.

This intelligent approach ensures optimal use of storage and improved return on investment, minimizing dependence on the grid and maximizing the value of every watt produced.

• Manual mode for personalized control

• Automatic mode for ease of use

• AI mode for dynamic and predictive optimization

• Maximizing self-consumption

Reduction of electricity bills and dynamic management of energy prices

By optimizing solar energy storage and controlling discharge at times when electricity rates are high, the Marstek Venus-E contributes to a significant reduction in electricity bills. The system exploits tariff variations in real time via the app , allowing the energy behavior of the home or business to be adapted.

This results in smoothing consumption peaks, better energy management, and a rapid return on investment in contexts where hourly rates or subscribed power rates have a strong influence on costs.

• Dynamic real-time rate management

• Smoothing consumption peaks

• Tracking via mobile app for instant adjustment

• Significant reduction in energy costs

Active participation in the energy transition: less dependence on fossil fuels

Using a Marstek Venus-E battery encourages responsible and environmentally friendly consumption by fully leveraging local, renewable solar energy. This approach effectively contributes to reducing dependence on fossil fuels by promoting energy independence for homes and businesses.

The deployment of this type of solution contributes to the global energy transition by supporting a more sustainable energy mix and optimizing available energy resources in an increasingly demanding context.

• Valorization of local solar energy

• Reducing carbon footprint

• Encouragement of more responsible consumption

• Support for the energy transition

Practical details: dimensions, weight, accessories included and installation precautions

The Marstek Venus-E battery has compact dimensions that make it easy to fit into various spaces: approximately 600 mm high , 440 mm wide and 320 mm deep . Weighing around 60 kg, it remains easy to handle, especially since the pack includes casters and a fixing kit for secure positioning.

The package also includes the necessary cables, a detailed user manual, and a warranty card, ensuring proper and safe commissioning. Its operating range extends from -20°C to +50°C, making it suitable for most temperate climates.

Characteristic	Detail
Nominal voltage	51.2 V
Overall efficiency	Greater than 93.5%
Dimensions (HxWxD)	600 x 440 x 320 mm
Weight	About 60 kg
Accessories included	Cables, casters, fixing kit, manual, warranty card
Operating temperature	-20°C to +50°C

FAQ

• What is the average lifespan of the Marstek Venus-E 5 kWh battery?
  It is designed to exceed 6000 charge/discharge cycles , i.e. a useful lifespan generally exceeding 10 years, supported by a manufacturer's warranty over this period.

• Can the Marstek Venus-E battery be installed outdoors?
  Yes, thanks to its IP65 protection rating, it can be installed outdoors provided it is protected from direct exposure to rain.

• Is it necessary to have a photovoltaic installation to use this battery?
  No, the battery can also function as a backup power supply or for off-grid uses, but it is ideal as part of a photovoltaic installation to optimize self-consumption.

• How is remote battery management done?
  Smart management is carried out via Wi-Fi or RS485 through a dedicated mobile application, allowing control, real-time monitoring and the receipt of notifications.

• Can multiple batteries be connected to increase capacity?
  Yes, up to 4 batteries can be connected in parallel to achieve up to 20 kWh of storage and 10 kW of power, providing a scalable solution for growing needs.