Powerful, flexible, and ready for serious storage.
The Deye SUN-20K-SG05LP3-EU-SM2 is a 20 kW three-phase low-voltage (48 V) hybrid inverter for large residential and small commercial systems. It supports on-grid and off-grid operation, AC-coupling to existing PV, up to 10 inverters in parallel, and six programmable charge/discharge periods—a robust core for self-consumption, peak-shaving and backup-oriented designs.

Why installers choose it

• Big PV headroom: up to 30,000 W PV input across 2 MPPT with 3 strings total (2+1); MPPT 160–650 V, VOC 800 V, rated PV 550 V; max operating PV input current 36+20 A, Isc 54+30 A.

• 48 V battery, high currents: lead-acid or Li-ion (40–60 V) with up to 350 A charge / 350 A discharge; Li-ion charging is BMS-adaptive (self-adaption). Transformer-isolation on the LV battery side.

• On-/off-grid + AC-couple: ideal for new builds and retrofits; supports generator energy storage.

• Parallel big: up to 10 units on-grid or off-grid for higher power and redundancy.

• Handles real-world loads: 100% unbalanced output (each phase) with per-phase output up to 50% of rated power; 2× rated off-grid surge (10 s) for motor starts.

• Installer-friendly control: 6 time periods for charge/discharge scheduling.

Reliability & compliance

• IP65 outdoor-ready enclosure; intelligent air cooling; operating range −40 °C to +60 °C (derating > +45 °C); noise < 60 dB.

• Integrated protections: DC polarity reverse, AC over-current/over-voltage, short-circuit, thermal, RCD detection, DC component & ground fault current monitoring, island protection, DC input switch; surge protection Type II (DC/AC).

• Grid codes & EMC: EN 50549, CEI 0-21, G99, VDE-AR-N 4105, plus others (NRS 097, RD 140/UNE 217002, OVE R25).

Monitoring & comms

• Interfaces: RS485 / RS232 / CAN; remote monitoring via Wi-Fi / GPRS / Bluetooth / 4G / LAN (optional).

Efficiency

• Max efficiency 97.6%, Euro 97.0%, MPPT > 99%; THDi < 3%, DC injection < 0.5% In.

Key specs (quick view)

• AC power: 20,000 W rated (three-phase); 22,000 VA max apparent; rated AC current 30.4/29 A.

• PV side: 2 MPPT, 2+1 strings; Max PV input 30 kW; VOC 800 V; MPPT 160–650 V; rated PV 550 V; Iop 36+20 A; Isc 54+30 A.

• Battery: 48 V (40–60 V); up to 350 A charge / 350 A discharge; 1 battery input; transformer-isolation design.

• Parallel: up to 10 inverters (on-/off-grid); AC passthrough (grid→load): 70 A; off-grid surge: 2× rated for 10 s.

• Enclosure & size: IP65; 456 × 750 × 268.5 mm; 50.6 kg; intelligent air cooling.

What’s in the box

• SUN-20K-SG05LP3-EU-SM2 inverter

• Mounting hardware & basic documentation (see datasheet for exact contents)

Good accessory pairings (sold separately)

• 48 V LiFePO₄ battery banks with CAN/RS485 BMS

• PV DC isolators, Type II surge protection, AC breakers

• Smart energy meter/CTs and zero-export accessories compatible with Deye

• LAN/Wi-Fi/4G communication options for remote monitoring