Deye SUN-12K-SG04LP3-EU

Three-phase hybrid inverter — Deye SUN-12K-SG04LP3-EU

The Deye SUN-12K-SG04LP3-EU is a low-voltage, three-phase hybrid inverter designed for PV+storage systems, offering transformer-isolated battery integration, AC/DC coupling for retrofits, and advanced energy management features for on-grid and off-grid applications.

Applications and use cases

This three-phase hybrid inverter suits residential, commercial and light industrial PV systems that require battery storage, unbalanced single-phase loads, or generator integration. It supports both AC-coupled retrofits of existing solar installations and new PV+battery projects where flexible backup and multi-unit scalability are needed.

• AC-coupling capability to retrofit existing solar arrays without reconfiguring DC strings.
• On-grid and off-grid operation for self-consumption, backup or islanding scenarios.
• Diesel-generator integration for storing generator energy to batteries and providing managed backup.
• Scalable installations: up to 10 inverters can run in parallel for larger three‑phase systems.

Key electrical and performance parameters

The SUN-12K-SG04LP3-EU combines PV string inputs and dual MPPTs with three-phase AC output and high conversion efficiency, with protections and surge categories suitable for demanding PV environments.

• Hybrid inverter power class: 12 kW continuous three‑phase inverter power with maximum AC capability up to 13.2 kW.
• PV DC handling: up to 15.6 kW maximum DC power, maximum DC voltage 800 V and maximum DC current around 51 A.
• MPPT and string inputs: 2 MPPT trackers with 6 DC inputs (recommended 2 strings per MPPT) for optimized PV harvesting.
• High conversion efficiency: maximum efficiency of 97.6% with Euro efficiency around 97% for strong energy yield.
• Unbalanced-load support: engineered for 100% unbalanced output per phase, and designed to manage scenarios where a single phase may operate at up to 50% of rated power under specified conditions.
• AC characteristics: nominal AC voltages 220/380 or 230/400 V (three‑phase) with configurable frequency 50/60 Hz and wide frequency range support.

Battery and backup capabilities

Built for low-voltage storage, the inverter supports 48 V battery banks with transformer isolation and offers robust charge/discharge control and scheduling for daily energy management and backup routines.

• Designed for 48 V low-voltage battery systems with transformer isolation for enhanced safety and compatibility.
• High current support: maximum charging/discharging current up to 240 A to enable fast battery throughput.
• Multiple batteries can be connected in parallel to expand usable capacity and redundancy.
• Energy management features include six configurable time periods for battery charging and discharging to support peak-shaving, time-of-use optimization and scheduled backup.
• Capability to store energy from a diesel generator, enabling hybrid generator–battery–PV workflows for extended autonomy.
• Parallel operation: supports up to 10 units in parallel for larger storage and higher output configurations in both grid-tied and off-grid modes.

Operating conditions and reliability

Engineered for harsh operating environments, this LV three-phase hybrid inverter offers an IP65 enclosure and multiple built-in protections to preserve system reliability and comply with safety and grid-code requirements.

• Weatherproof design with IP65 rating suitable for outdoor installation in exposed locations.
• Wide operating temperature range from -40 °C to 60 °C with derating above 45 °C for reliable thermal performance.
• Comprehensive protection suite including anti-islanding, PV string reverse polarity protection, insulation resistance detection and residual current monitoring.
• Output protections such as over-current, short-circuit and surge protection with DC/AC surge categories implemented.
• Product warranty baseline 5 years with optional 10-year extension for longer-term assurance.

Mechanical design and installation

The inverter delivers a compact footprint and manageable weight for professional rooftop or ground-mount installations with an enclosure built for outdoor use and straightforward integration into PV+storage systems.

• Compact dimensions (H x W x D): 702 × 422 × 281 mm and a shipping/installed weight of approximately 33.6 kg.
• Transformer isolation on battery side simplifies low-voltage battery connection and improves system safety.
• Multiple DC inputs and dual MPPT layout reduce string complexity and ease PV string layout planning.
• Designed for system scalability and flexible deployment, supporting multi-unit parallel layouts and multiple parallel battery banks.