Yes. The Der SunEnergyXT 500 PRO AC Core all-in-one home storage system delivers up to 2,400 W of total output power. For example, if 800 W is being fed into the home grid, up to 1,600 W remains available via the integrated backup socket, without any manual switching or special mode being required.

The backup socket is always active when in use. If the battery is depleted, the system automatically switches to grid power. This allows the SunEnergyXT 500 PRO AC Core to function simultaneously as a home energy storage system with backup power supply.

Nein, der SunEnergyXT 500 PRO muss mit 2.400 W Ausgangsleistung zwingend von einem Fachbetrieb angeschlossen und beim Netzbetreiber sowie dem Marktstammdatenregister (MaStR) angemeldet werden.

Zum Netzanschluss stehen Installateuren mehrere Optionen offen: Im Fachhandel erhältlich sind spezielle Kabel mit offenem Ende für einen Festanschluss, Kabel mit Wieland-Stecker und auch Starkstromkabel (CEE, 5-polig, 32 A) für den Parallelbetrieb mehrerer Kopfspeicher. Die verfügbaren Längen reichen je nach Kabel von 3m bis 15m.

Basic version (800 VA): Complies with VDE-AR-N 4105:2026-3 for simplified registration by non-professionals with the grid operator. Requirement: connection via an energy socket (e.g. Wieland socket). A standard earth-connected plug (Schuko in German) is not compliant. If no energy socket is installed, a certified electrician is required.

PRO version (2,400 W): Installation by a certified electrician is mandatory. From a charging capacity of 4.2 kW (e.g. 2× PRO units), §14a EnWG applies, allowing for grid operator control.

A smart meter gateway (iMSys) is only required for larger system expansions. Registration with both the market master data register (for the German market) and the grid operator is always required.

Ja. Der 500 PRO AC Core is hardwareseitig mit 4x 625 W MPPT-Solarladereglern ausgestattet.

Diese können nachträglich einfach via bezahltem Upgrade aktiviert werden, sodass Du bis zu 8 Solarmodule direkt an jeden 500 PRO AC Core anschließen kannst.

The entire 500 series offers a local API (via TCP/MQTT) and full Home Assistant integration for maximum flexibility. Additionally, the following energy meters are natively supported: Shelly (Pro) 3EM und EM-50, EcoTracker IR und P1 sowie bitShake.

Thanks to the open API, integrations into existing smart home environments is straightforward.

The Der SunEnergyXT 500 PRO AC Core is designed for outdoor use:

Protection class IP65 (dust-tight and water jet resistant)

Operating temperature: −20°C to +55°C

Integrated battery heating (automatic heating below 0°C)

Built-in fire suppression cartridge for added safety

Above 45°C, output power is automatically reduced to protect the LFP cells.

Recommendations: Install beneath a carport, canopy, or balcony roof to maximize service life.

Yes, on the software side: From launch, the Der SunEnergyXT 500 PRO AC Core can operate together with BK215/BK215 Plus products via a multi-zone strategy (cloud-based) or locally through Home Assistant. The SunEnergyXT 500 PRO AC Core is added to a separate "zone." One energy meter (e.g. Shelly) is sufficient for both systems.

However, physical connection is not supported: Direct cable connection between Der SunEnergyXT 500 PRO AC Core and BK215 is not possible. Integration is handled exclusively via software.

Yes. The backup socket (emergency power) and UPS mode (switching time under 10 ms) are always operational, even without internet access. Off-grid operation with up to 2,400 W output per main battery unit is also independent of connection to the internet.

For full control via the SunEnergyXT app, a cloud connection is required. Alternatively, local control is available via local API or Home Assistant.

An internet connection is recommended for initial setup and required for firmware updates. Manual update options (e.g. via external devices) are currently under evaluation.

The SunEnergyXT 500 PRO AC Core features passive cell balancing.

The SunEnergyXT 500 series uses high-quality 314Ah EVE LFP (lithium iron phosphate) cells and is rated for at least 10,000 charge cycles. With one cycle per day, this corresponds to a lifespan of over 27 years.