Marstek Venus D - 2.56 kWh Battery Expansion Module

The Marstek Venus D 2.56 kWh Battery Expansion Module is the expandable energy storage module for the Marstek Venus D home battery system. This high-quality LiFePO4 battery provides a capacity of 2.56 kWh and allows you to easily expand your system’s storage capacity up to 15.36 kWh. Thanks to its modular stackable design, the battery can be added to an existing Venus D system without complex installation work.

The battery operates at a nominal voltage of 51.2 V and uses safe and durable lithium iron phosphate (LiFePO4) cells with more than 6,000 charge cycles. With a depth of discharge of 90%, the battery delivers a high level of usable energy storage, making it ideal for maximizing solar self-consumption, reducing peak energy demand, and providing backup power.

With its IP65 protection rating, the Marstek Venus D battery module is suitable for both indoor and outdoor installations. The battery operates reliably in a wide range of weather conditions and features natural cooling for quiet, fan-free operation.

When combined with the Marstek Venus D Power Module, you benefit from intelligent energy management, support for solar self-consumption, dynamic charging and discharging strategies, and integration with smart energy meters. This helps increase the efficiency of your PV installation while reducing dependence on the utility grid.

Key Features:

• 2.56 kWh expandable LiFePO4 battery module


• Expandable up to 15.36 kWh (maximum of 6 battery modules)


• More than 6,000 charge cycles


• 51.2 V nominal voltage


• 90% depth of discharge (DoD)


• Modular stackable design


• IP65 water and dust resistant


• Natural, silent cooling


• Suitable for self-consumption, energy storage, and backup power applications


• Perfect expansion for the Marstek Venus D energy storage system