As energy prices continue to rise and balcony solar systems become more popular across Europe, many households are asking:
“Which energy storage system is the best match for my home?”
Marstek offers several battery solutions tailored to different needs: the Venus E, Jupiter C+, and the B2500 Hybrid Kit. But which one should you choose?
In this article, we break down the differences to help you find the perfect fit — whether you're a complete beginner or already have a PV system installed.
Why Battery Storage Matters in 2025
With rising electricity costs, grid instability, and feed-in tariffs dropping in many regions, having a solar battery:
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Increases your solar self-consumption
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Protects against outages
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Lets you save by using your own solar energy instead of expensive grid power
But not all batteries are the same — some are built for plug-and-play use, others for system upgrades.
Meet the Marstek Battery Lineup
| Model | Marstek Jupiter C+ | Marstek Venus E | Marstek B2500 |
|---|---|---|---|
| Type | Balcony PV Kit with microinverter & battery | AC-coupled standalone battery | Solar-charged battery system (no grid charging) |
| Solar Charging | ✅ Direct panel input | ❌ Not direct | ✅ Direct panel input |
| Grid Charging | ✅ Yes | ✅ Yes | ❌ Not supported |
| Built-in Inverter | ✅ Yes (microinverter) | ✅ Yes | External microinverter required |
| Battery Size | 2.56kWh | 5.12kWh | 2.24kWh (expandable) |
| Use Case | Beginners & renters | Homes with PV but no storage and dynamic tariff | On-grid solar use |
| Installation | Plug & Play | Plug & Play | Plug & Play (with PV) |
Which One Fits Your Situation?
✅ You need a reliable backup power source and intelligently supports peak shaving and valley filling to optimize energy usage ? → Venus E
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No need to replace your inverter.
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AC plug-in setup.
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Backup Power source
- Using Home Appliances During a Power Outage
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Ideal for retrofitting storage easily.
“Add storage without changing your system – Venus E makes it simple.”
You can order the Marstek Venus E 5.12kWh Battery online via our store:
🔗 Shop now – Marstek Venus E on Greenlimon.shop
✅ You’re new and want a full balcony power kit? → Jupiter C+
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Includes microinverter + battery.
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Direct connection to solar panels (2–4 modules).
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No electrician needed, fully plug-and-play.
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Best for small households or renters.
“Your first balcony PV system – no tools, no confusion.”
You can order the Marstek Jupiter C+ suit online via our store:
🔗 Shop now – Marstek Jupiter C+ on Greenlimon.shop
✅ You want off-grid or solar-only storage? → B2500
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Charges only from solar panels (no grid charging).
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Designed for plug-in with microinverters like Saturn-M.
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Ideal for green energy storage independent of the grid.
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Expandable battery capacity up to 8.96kWh.
“Simple solar charging, made for energy independence.”
You can order the Marstek B2500 suit online via our store:
🔗 Shop now – Marstek B2500 on Greenlimon.shop
Still Unsure? Here’s a Quick Decision Guide:
| I want to... | Best choice |
|---|---|
| Plug into my existing PV system | Venus E |
| Start from scratch with solar | Jupiter C+ |
| Perfect for users who plan to scale their storage over time | Jupiter C+ |
| Get the largest capacity in one unit | Venus E |
| Expand later or DIY my setup | B2500 |
| Go off-grid with balcony solar | B2500 |
Real-World Scenarios
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Anna, lives in an apartment, no PV: → Jupiter C+ for full plug-in solar system
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Markus, has PV on roof but no storage: → Venus E to add storage easily
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Sabine, wants to live off-grid with solar: → B2500 with PV modules
Where to Buy?
You can find all three Marstek systems, including combo kits, on Greenlimon.shop.We are an authorized distributor of Marstek.We offer expert guidance, accessories like CT meters, and multilingual support.
No One-Size-Fits-All – But a Perfect Fit Exists
Marstek's lineup gives you flexible, affordable, and scalable energy storage options — no matter your solar journey stage.
