Configuration

Specifications

All-in-one plug-in battery: ~7 kg inverter unit + 17 kg per 2.12 kWh LFP module; base config (2.12 kWh) ~24 kg, independent reviews cite ~26 kg. Capacity expandable 2.12 to 12.72 kWh (up to 6 modules); the 1.5 kW inverter output is fixed and does NOT increase with added modules. CONFLICT on max AC output: current official Marstek pages (eu.marstekenergy.com and marstek.nl, EN/NL) state 1.5 kW (1500 W) continuous and 1500 W backup; the Sept 2025 launch announcement and a Nov 2025 independent review state 1200 W continuous / 1440 W peak with 1200 W backup, likely an earlier spec revision. maxOutputW set to the current official 1500 W ceiling (not the Dutch 800 W socket cap). 4x MPPT solar input, ~600 W per tracker, 16-60 V, 20 A. EPS backup switchover <15 ms. Single-phase; can be installed on single- or three-phase home connections. P1 meter (CT002/CT003, HomeWizard compatible) included in NL bundles. WiFi/Bluetooth/Ethernet; native Modbus TCP and RS485, integrates with Home Assistant (community Marstek Venus Energy Manager) and evcc. No official round-trip efficiency published; independent testing measured ~84%. Operating range -20 to +55/60 C. usablePct not officially stated.

updated 11 Jun 2026