Marstek Venus E 3.0 vs 4.0: the differences (and what about the 2.0 and Venus A)
Last updated: 30 September 2026 · By Team Multi-Solar, home batteries since 2022, Rotterdam
On a dedicated circuit, the Marstek Venus E 4.0 delivers 3,000 W instead of the 2,500 W of the Venus E 3.0, uses larger 314 Ah cells that according to Marstek can be fully charged and discharged more than 10,000 times (3.0: more than 6,000), and weighs 47.2 kg. The capacity is virtually the same, around 5 kWh. Via the socket, both deliver 800 W. Below you will find all generations in one table, the five real differences, and which Venus suits you.
How do all generations compare in one table?
Specifications from Marstek's brochures and product data, as of 30 September 2026.
| Venus E 2.0 | Venus E 3.0 | Venus E 4.0 | Venus A | |
|---|---|---|---|---|
| Capacity | 5.12 kWh | 5.12 kWh | 5 kWh (5,024 Wh) | 2.12 kWh per module, up to 12.72 kWh |
| Power via socket | 800 W | 800 W | 800 W | 800 W |
| Power on a dedicated circuit | 2,500 W | 2,500 W | 3,000 W | 1,200 W |
| Backup power output | yes | 2,500 W | 3,000 W, briefly 3,600 W, switchover within 10 ms | 1,200 W |
| Cells and cycles | LiFePO4 | LiFePO4, more than 6,000 | 314 Ah LiFePO4, more than 10,000 | LiFePO4 |
| Weight | approximately 65 kg | – | 47.2 kg | approximately 41 kg per module |
| Dimensions | with handles and wheels | 48 × 62.4 × 15.3 cm | 52 × 43 × 19.1 cm | modular tower |
| Connectivity | Wi-Fi | Wi-Fi and UTP | Wi-Fi, Bluetooth and LAN | Wi-Fi and LAN |
| Expansion | up to four per phase | up to three per phase | via SmartBox up to three units, 15 kWh and 9 kW | modules up to 12.72 kWh |
| Solar input | no | no | no | approximately 1.4 kW, four MPPTs |
| Smart control | time schedules | AI mode and time schedules | AI optimisation based on weather and prices, VPP-ready | dynamic tariff and time schedules |
| Protection rating and warranty | 10 years | IP65, 10 years | IP65, 10 years | 10 years |
The 2.0 is no longer offered as a new product; its data is included for those who own one.
What are the five real differences between the 3.0 and the 4.0?
Power: 2.5 kW to 3 kW
On a dedicated circuit, the 4.0 charges and delivers at 3,000 W, the 3.0 at 2,500 W. With that extra half kilowatt, the 4.0 covers more peaks from a washing machine, oven or induction hob. Via a regular socket, both deliver 800 W; so you only notice the difference if an installer puts the battery on a dedicated circuit.
Cells and lifespan
The 4.0 uses 314 Ah cells and, according to the brochure, is good for more than 10,000 charge cycles at 25 °C. The 3.0 is rated for more than 6,000. Both use LiFePO4, the most stable cell chemistry for home use, and both have a 10-year warranty.
Weight and size
The 4.0 weighs 47.2 kg and measures 52 × 43 × 19.1 cm. It hangs on the wall or stands on the floor, with a magnetic cable cover over the connections. The 3.0 is flatter (15.3 cm deep) and hangs on the supplied wall bracket.
Backup power
Both have a backup power output. The 3.0 delivers 2,500 W there, the 4.0 3,000 W continuously and briefly 3,600 W, and switches over within 10 ms. In both cases, only what you connect to that output keeps running; keeping the whole house running requires a changeover switch in the electrical panel. The three levels are explained in backup power with a home battery.
Software and display
The 3.0 has an AI mode for charging on dynamic tariffs. The 4.0 goes a step further with AI optimisation based on the weather forecast and energy prices, and is ready to take part in a virtual power plant (VPP) via your supplier. It has an LCD display and, in addition to Wi-Fi and LAN, also Bluetooth. You can read how smart charging works in home battery and dynamic energy contract.
What is different about the older Venus E 2.0?
The 2.0 was larger and heavier, with handles and wheels, and only had Wi-Fi. It could be expanded to up to four per phase. If you have one, there is no reason to replace it: it does what it is supposed to do. The Marstek app also supports the earlier versions. If you want to add a 3.0 or 4.0 alongside it, ask us first whether that combination is supported in your situation; that depends on firmware and meter.
Why would you choose the Venus A?
The Venus A is designed for starting small. One module has 2.12 kWh, and you can build it up to 12.72 kWh. It delivers 1,200 W and has its own solar input of approximately 1.4 kW with four MPPTs, so you can connect a few panels on a balcony or flat roof directly, without a separate inverter. The P1 smart meter dongle (P1-meter) is included. That makes it suitable for a rented home, a small household, or anyone who does not yet have solar panels.
Which Venus suits you?
You have solar panels, want to use your own electricity in the evening, and connect it yourself. Then the Venus E 3.0 is the logical choice: our most popular battery, with a lot of experience among customers.
You want more power on a dedicated circuit, the longest cell lifespan and smart charging based on weather and prices. Choose the Venus E 4.0. A dedicated circuit or multiple units with the SmartBox are arranged via a quote.
You want to start small, expand modularly and connect panels directly. Then the Venus A is the right fit.
You already have a Venus E 2.0. Keep it, or expand after discussing the combination with us.
You want a compact wall-mounted model. The Venus E Mini has 2 kWh, 1.5 kW and weighs 22 kg.
You want 10 kWh in one cabinet with plenty of backup power. The Venus Max delivers 3,600 W and grows via the SmartBox to 30 kWh.
You want to connect the whole house permanently, with 6 kW and backup power for everything. Take a look at the Venus X; it is always installed by an installer. You will find other brands among the fixed home batteries.
Torn between two models? Request a no-obligation quote and we will look at your consumption and your electrical panel.
What about combining, expanding and the right meter?
- Expanding. You can expand the 3.0 to up to three batteries per phase. You link the 4.0 with the SmartBox to up to three units, together 15 kWh and 9 kW. The Venus A grows with expansion modules. According to Marstek, multiple batteries across the phases are only permitted after inspection by a qualified electrician.
- Meter. The 3.0 and 4.0 are controlled via the CT003 P1 smart meter dongle (P1-meter), or via the CT002 if you do not have a DSMR 5 meter. According to Marstek, a HomeWizard P1 meter only works with a single battery. You can read everything about the choice in P1 meter or CT clamp.
- Registration. In the Netherlands, you register every battery from 0.8 kW with your grid operator via energieleveren.nl, and again after expansion.
Frequently asked questions
Is the Venus E 4.0 worth it compared to the 3.0?
If you put it on a dedicated circuit, want the cells to last a long time, or want to take part in smart charging and VPP, then yes. Via a regular socket, both deliver 800 W and you will notice less difference in everyday use.
Can I put a Venus E 4.0 alongside my Venus E 3.0?
That depends on firmware, meter and the way they are linked. Contact us before you order and we will check it for your situation. Multiple batteries across the phases always require an inspection by an electrician.
What is the difference between the Venus A and the Venus E?
The Venus A is modular from 2.12 kWh, delivers 1,200 W and has its own solar input. The Venus E has 5 kWh in one housing, delivers 2,500 or 3,000 W on a dedicated circuit and has no solar input; it works alongside your existing inverter.
How many Venus E batteries can I link?
Of the 3.0, up to three per phase. Of the 4.0, up to three units via the SmartBox, together 15 kWh and 9 kW. Register the total with your grid operator.
Does the Venus E 4.0 provide backup power for the whole house?
The 4.0 has a 3,000 W backup power output that switches over within 10 ms; whatever you connect to it keeps running. For the whole house, you need a changeover switch in the electrical panel. We discuss that in a quote.
View the entire Marstek line or all plug & play home batteries. You can order the Venus E 3.0 with a P1 meter, with a CT clamp or without a meter; for the Venus E 4.0, the P1 meter and CT clamp are optional.
Sources
- Marstek, Venus E 4.0 brochure (specifications, consulted 30 September 2026)
- Marstek, Venus E 3.0 brochure and user manual; product data for Venus E 2.0, 3.0, 4.0, Venus A, Venus E Mini, Venus Max and Venus X on multi-solar.nl (30 September 2026)
- Marstek Netherlands, "Installation manual Marstek P1 meter, home battery & app" (June 2026)