Sunpura S2400 or S2400 AC? Decide which one is right for you – based on the single-phase rated power.

In the European home energy storage market, the Sunpura S2400 series has gained considerable popularity in Germany, Austria, the Netherlands, and Belgium thanks to its "plug-and-play flexibility and scalable capacity." However, many customers are asking: How do I choose between the S2400 and the S2400 AC? This article clarifies the selection criteria, based on the single-phase rated power and country-specific requirements.

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1. Single-phase rated power: Same power, different connections

First, the key finding: The S2400 and S2400 AC have the same single-phase rated power , namely:

• Mains operation (on-grid) : 800 W (stable for everyday devices such as lighting, laptops and small appliances).

• Off-grid operation : 2400 W (enough for appliances with higher power consumption such as coffee machines, microwaves and kettles).

The main difference lies in the connection technology and the use cases:

• S2400 : DC+AC mixed connection with direct PV connection (requires balcony or rooftop PV). Ideal for customers who want to build a "PV+storage" system completely from scratch.

• S2400 AC : Pure AC coupling without PV input. Power is drawn via existing PV inverters or the grid. Perfect for customers who want to supplement their existing PV system with a storage system.

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2. Country-specific selection: Germany/Austria vs. Netherlands/Belgium

For Germany and Austria: Focus on compatibility and dynamic tariffs

In Germany and Austria, strict safety certifications (e.g. VDE, EN50549) and network requirements (e.g. zero-feed-in, adaptation to dynamic tariffs) apply.

Choose S2400 if:

• You want to set up a new energy system (e.g., new balcony PV customers) or install "PV+storage" in one step.

• The DC+AC hybrid technology enables direct connection to PV modules (max. 2×1000 W MPPT input). The integrated intelligent BMS optimizes self-consumption and complies with the German "Solar Peak Act 2025" regulation to prevent grid feed-in.

Choose S2400 AC if:

• You already have a rooftop PV system with an AC inverter and only want to add storage to increase self-consumption (e.g., adapting to dynamic tariffs like Tibber).

• The AC coupling enables immediate installation without changes to the DC circuit diagram – in just 15 minutes, compatible with dynamic tariff platforms.

For the Netherlands and Belgium: Focus on easy installation and upgrades of existing systems

In the Netherlands and Belgium (often rented apartments or small houses), customers are particularly interested in "easy installation" and "compatibility with old systems" (e.g., the Netherlands uses P1 smart meters, Belgium requires multilingualism).

Choose S2400 if:

• If you are a tenant or live in an apartment and want to start installing balcony PV (e.g., lightweight glass PV modules), the "PV+storage" integration requires no professional installation – simply plug it in and use it. The modular design allows for scalability up to 9.6 kWh.
  

Choose S2400 AC if:

• You already have an established rooftop PV system (the Dutch prefer AC coupling) and want to add storage to increase self-consumption (e.g., avoiding "PV without storage"). Supported

• P1 smart meter data and can be coupled with local systems such as HomeWizard to maximize energy efficiency.

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3. Conclusion: Fast decision-making with this table

Both models share common advantages such as IP65 protection (suitable for outdoor use), 8,000 charging cycles (15-year lifespan), and WiFi+Bluetooth communication. Choose based on your PV system status and country-specific requirements – and enjoy the freedom to control your energy consumption!