MARSTEK VENUS-D: 4kW 4 MPPT Balcony Energy Storage System

Core Product Advantages

• Max Solar Harvest: 4 MPPT channels support 4kW total solar input, optimizing energy capture from balcony PV panels for higher efficiency.
• Dual Power Modes: 2.2kW bidirectional on-grid power for daily use, plus 2.2kW backup power (2.5kW peak) to keep critical loads running during outages.
• Ultra-Fast EPS Switchover: 15ms transfer time ensures uninterrupted power, eliminating downtime during grid failures.
• Plug & Play Integration: Seamlessly works with existing solar systems — no complex installation or professional expertise required.
• Flexible Expansion: Modular design allows up to 6 battery units (max 15.36kWh) per system; supports parallel operation for larger needs.
• Scalable Whole-Home Backup: Pair with MARSTEK SmartBox for single/three-phase whole-home backup. Single-phase: up to 3 units (6.6kW/46.08kWh); three-phase: up to 9 units (19.8kW/138.24kWh).
• Smart Energy Management: Anti feed-in function with MARSTEK, Shelly, and other smart meters; AI-optimized TOU (Time-of-Use) management cuts electricity costs.
• Durable & Weatherproof: IP65 waterproof/dustproof rating, operating temperature range of -20°C to 60°C, ideal for balcony installations.
• Long-Lasting Reliability: LiFePO4 (LFP) cells with >6000 cycles, 90% depth of discharge (DoD), and 10-year warranty for peace of mind.

Key Performance Metrics

• Solar Input: 4 MPPT channels, 4kW total power for efficient solar energy utilization.
• Power Output: 2.2kW bidirectional on-grid power; 2.2kW backup power (2.5kW peak) with stable pure sine wave output.
• Battery Capacity: 2.56kWh per unit (50Ah, 51.2V), expandable to 15.36kWh (6 units) per base system.
• Switchover Speed: EPS <15ms for instant backup power.
• Cycle Life: >6000 cycles (25°C) with 90% DoD for long-term durability.
• Warranty: 10-year warranty on core components.

Technical Specifications

Versatile Application Scenarios