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AC and DC: The right solar storage for you
More and more households are relying on balcony power plants and small photovoltaic systems to reduce their electricity costs. But those who want to not only produce electricity, but also store efficiently will quickly come across two terms:
👉 AC storage and DC storage.
Sounds technical? Don't worry. In this article, we'll help you in everyday language and with real examplesto find out which storage type suits your needs – and why today many things are moving towards AC systems
What you should know before choosing
Before we get into the technology: The difference between AC and DC is not a black and white issue, but a question of Comfort requirements, efficiency and sustainability.
Ask yourself 3 questions:
-
Do I want to use the memory simply connect it yourself or combine flexibly?
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Is me easy integration more important or fine system control?
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Do I already have a PV system or am I starting a new one?
Scenario 1: “I just want to get started – and do it in a system-compliant manner” → AC storage
Who is an AC storage system suitable for?
A AC-coupled power storage is particularly suitable for those who live in rented accommodation or do not want to carry out complex installation. If you already have a Balcony power plant with microinverter (e.g. from Hoymiles) and Store excess solar power during the day and use it in the evening This solution is ideal for those who want to use AC storage systems quickly and are perfect for beginners or retrofit projects.
How an AC storage system works
The energy generated by the solar modules Direct current (DC) is fed directly into the microinverter Alternating current (AC) The power storage unit is then simply connected to a normal socket connected – without the need for an electrician. Installation is usually completed in just a few minutes, and the system is immediately ready for use. Rental apartments and existing PV systems This is a particularly uncomplicated solution.
Advantages – using the Zendure SolarFlow 2400 as an example
Even though the double conversion results in small efficiency losses and control over the PV output is somewhat limited, an AC storage system offers many advantages: Plug & Play, easy to use, often integrated emergency power function and Compatibility with future smart grids.
A good example is the Zendure SolarFlow 2400 - on modular AC power storage with 2400 W output power, which can be optimally combined with microinverters such as Hoymiles. Its easy installation and grid-compliant technology make it a popular solution for modern households.
Zendure SolarFlow 2400 Set
Expandable up to 16,8 kWh
€ 1.897 | MiniZ05 Save 5% when you pre-order!
- ⭐ Bidirectional AC technology
- ⭐ Complete set: 1x 2400 AC + 2x AB3000X
- ⭐ 0% VAT in Germany
- ⭐ Real-time app control
Scenario 2: “I want maximum efficiency – no problem with planning” → DC storage
Who is DC storage suitable for?
A DC-coupled power storage is ideal for all those who a new PV system with higher performance or want to individually optimize an existing system. If you want to get the most out of your solar system – for example, for a self-sufficient garden house, a holiday home, or a larger home system – a DC storage system offers highest efficiency with maximum control. Also at Off-grid solutions This variant is particularly in demand for more complex and demanding energy projects.
How a DC storage system works
The energy generated by the PV modules Direct current (DC) is fed directly into the storage – without prior conversion to alternating current. Only when the energy is later fed into the house network is the conversion from DC to AC carried out using a MicroinverterThis direct storage minimizes energy losses and allows very precise control of energy flows. However, this system not ready to plug in and requires careful planning and precise coordination of all components.
Advantages – using the example of the Anker SOLIX Solar Bank 3 Pro
A DC storage system impresses with high efficiency, flexible expandability and optimal use of the available PV power. Especially for larger systems or energy-autonomous systems it offers clear advantages.
A typical example is the Anker SOLIX Solar Bank 3 Pro: With a PV input power of up to 3600 W (DC), a voltage range of 16–60 V, four MPPT inputs, protection class IP65 and App control via Wi-Fi or BluetoothIt is ideally suited for custom-designed PV setups. It can be combined with microinverters—ideal for those who don't want to compromise on efficiency and control.
Anker SOLIX E2700 Pro
2,68 kWh storage
€ 1299 | anchor prime day Save up to 220 €!
- ⭐ For balcony power plants
- ⭐ Easy installation
- ⭐ Emergency power, app, modular
AC or DC? A practical comparison
| Question | AC storage | DC storage |
|---|---|---|
| Easy installation? | ✅ Yes, plug & play possible | ❌ Only in system context |
| Future-proof energy grid expansion? | ✅ Very good | 🔸 Possible, but more complex |
| Ideal for rental apartments? | ✅ Yes | ❌ Mostly unsuitable |
| Technically efficient? | 🔸 Good, but with conversion | ✅ Very high through direct charging |
| Emergency power capable? | ✅ Mostly integrated | 🔸 Only with additional solution |
| Entry for beginners? | ✅ Clear favorite | 🔸 Only for hobbyists/professionals |
Conclusion: AC becomes the standard – but DC remains strong for special cases
The development on the market clearly shows:
✅ AC storage is becoming the standard solution for balcony power plants, rental apartments and retrofits.
They are easy to integrate, fit into existing systems and are compatible with future network requirements.
Although DC storage more technically efficient They are more likely to be intended for more complex, larger or off-grid systems.
🛠️ For 80% of users, the recommendation today is:
AC storage – simple, safe, future-oriented.
For everyone else: DC remains an exciting solution – with more effort, but also more control options.
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