Name: DEYE 18kW Three-Phase Hybrid Inverter SUN-18K-SG05LP3-EU-SM2
Brand: DEYE
SKU: SUN-18K-SG05LP3-EU-SM2
Price: 2540.0 EUR

DEYE 18kW Three-Phase Hybrid Inverter SUN-18K-SG05LP3-EU-SM2

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Description

Download the datasheet
Download the manual
Download the Declaration of Conformity

The DEYE SUN-18K-SG05LP3-EU-SM2 is an 18kW three-phase hybrid inverter designed for photovoltaic installations using 40–60V low-voltage batteries. Its two battery inputs and maximum charging/discharging current of 330A make it suitable for storage systems sized for high residential or commercial energy consumption.

The inverter combines the management of photovoltaic panels, batteries, the grid, and electrical loads in a single unit. It can be added to an existing installation through AC coupling and supports the storage of energy supplied by a diesel generator. Six programmable time periods provide control over when the battery is charged and discharged.

The model supports up to 28.8kW of maximum PV input power and features two MPPT trackers, each supporting two strings. The three-phase output can operate with 100% unbalanced loads, with up to 50% of the rated power available on each phase. In off-grid mode, the unit can deliver twice its rated output for 10 seconds.

Main features

18kW three-phase hybrid inverter
Compatible with 40–60V lead-acid or lithium-ion batteries
Two battery inputs
Maximum charging and discharging current of 330A
Two MPPT trackers with a 2+2 string configuration
Six programmable charging/discharging periods
AC coupling for upgrading existing photovoltaic systems
Up to 10 units connected in parallel for on-grid and off-grid operation
Supports multiple batteries connected in parallel
Supports energy storage from a diesel generator
100% unbalanced output
Wi-Fi, RS485, and CAN communication
IP65 protection rating

Advantages

Power for demanding applications: The 18kW capacity is suitable for three-phase projects with significant loads, provided that the installation is correctly sized.

Management of a high-capacity storage system: The maximum current of 330A supports the charging and discharging of properly sized compatible batteries.

Flexible photovoltaic array: The maximum PV input power of 28.8kW and two MPPT trackers enable the efficient use of panel arrays with different orientations.

Fewer limitations between phases: The 100% unbalanced output is useful in applications where loads are not distributed equally across the phases.

Integration with multiple energy sources: The system can coordinate energy from photovoltaic panels, the grid, batteries, and a generator.

Scalability: Up to 10 inverters can be connected in parallel, allowing a properly designed installation to be expanded.

Recommended applications

Large homes and properties with numerous three-phase loads
Guesthouses, villas, and multifunctional buildings
Commercial premises and offices
Workshops and small commercial applications
Photovoltaic systems with high-capacity energy storage
Upgrading an existing installation through AC coupling
Systems using a generator as an additional power source

Technical specifications

Specification	Value
Model	SUN-18K-SG05LP3-EU-SM2
Type	Three-phase hybrid inverter
Battery type	Lead-acid or lithium-ion
Battery voltage range	40–60V
Number of battery inputs	2
Maximum charging/discharging current	330A
Lithium-ion charging strategy	Automatic adaptation to the BMS
Maximum PV access power	36,000W
Maximum PV input power	28,800W
Maximum PV input voltage	800V
Start-up voltage	160V
MPPT voltage range	160–650V
Rated PV input voltage	550V
Maximum PV operating input current	36+36A
Maximum PV short-circuit current	54+54A
MPPT trackers / strings per MPPT	2 / 2+2
Rated AC active power	18,000W
Maximum AC apparent power	19,800VA
Rated AC input/output current	27.3/26.1A
Maximum AC input/output current	30/28.7A
Maximum continuous AC bypass current	70A
Off-grid peak power	2 × rated power for 10 seconds
Rated input/output voltage	220/380V, 230/400V; 0.85Un–1.1Un; 3L+N+PE
Grid frequency/range	50Hz / 45–55Hz; 60Hz / 55–65Hz
Power factor adjustment range	0.8 leading to 0.8 lagging
THDi	<3% of rated power
DC injection current	<0.5% In
Maximum efficiency	97.6%
European efficiency	97.0%
MPPT efficiency	>99%
Display	LCD
Communication	Wi-Fi, RS485, CAN
Operating temperature	-40°C to +60°C; power derating above 45°C
Permissible humidity	0–100%
Permissible altitude	3,000m
Noise level	<60dB
Protection rating	IP65
Topology	Non-isolated on the solar side; isolated on the battery side
Overvoltage category	OVC II (DC), OVC III (AC)
Enclosure dimensions (W × H × D)	456 × 750 × 268.5mm, excluding connectors and mounting brackets
Weight	51.9kg
Cooling	Intelligent air cooling
Surge protection	Type II (DC), Type II (AC)

Compatibility and integration

The inverter supports lead-acid and lithium-ion batteries within the 40–60V range. For lithium-ion batteries, the charging strategy adapts to the BMS through compatible communication. Exact compatibility depends on the battery model, BMS protocol, and firmware version. We recommend checking compatibility before purchase.

The photovoltaic strings must be sized according to the voltage and current limits of each MPPT, including variations in module voltage caused by temperature changes.

Protection and safety

The inverter includes DC reverse-polarity protection, AC output overcurrent protection, thermal protection, AC overvoltage protection, AC output short-circuit protection, DC component monitoring, AFCI, anti-islanding protection, a DC switch, insulation impedance detection, and residual current monitoring. Surge protection is Type II on the DC side and Type II on the AC side.

Standards declared by the manufacturer

Grid regulations: IEC 61727, IEC 62116, CEI 0-21, EN 50549, NRS 097, RD 140, UNE 217002, OVE-Richtlinie R25, G99, VDE-AR-N 4105

Safety and EMC: IEC/EN 61000-6-1/2/3/4, IEC/EN 62109-1, IEC/EN 62109-2

System sizing, installation, and commissioning must be carried out by qualified personnel in accordance with DEYE documentation and applicable regulations.