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Deye SUN-20K-SG05LP3-EU-SM2 Hybrid Inverter
SKU
SUN-20K-SG05LP3-EU-SM2
Brand
Deye
Datasheet (PDF)

Deye SUN-20K-SG05LP3-EU-SM2 Hybrid Inverter

The Deye SUN-20K-SG05LP3-EU-SM2 is the upper tier of 51.2 V three-phase hybrids—where DC currents still fit manageable busbars but installers should already be modeling HV crossover above ~40 kWh stored.

Tech Specs

Deye SUN-20K-SG05LP3-EU-SM2 Hybrid Inverter — Tech Specs
Parameter SUN-14K-SG05LP3-EU-SM2 SUN-15K-SG05LP3-EU-SM2 SUN-16K-SG05LP3-EU-SM2 SUN-18K-SG05LP3-EU-SM2 SUN-20K-SG05LP3-EU-SM2
Battery Input Data
Battery Type Lead-acid or Lithium-ion
Battery Voltage Range (V) 40-60
Max. Charging/Discharging Current (A) 260 280 300 330 350
Charging Strategy forLi-ion Battery Self-adaption to BMS
Number of Battery Input 2
PV String Input Data
Max. PV Access Power (W) 28000 30000 32000 36000 40000
Max. PV Input Power (W) 22400 24000 25600 28800 32000
Max. PV Input Voltage (V) 800
Start-up Voltage (V) 160
MPPT Voltage Range (V) 160-650
Rated PV Input Voltage (V) 550
Max. Operating PV Input Current (A) 36+36
Max. Input Short-Circuit Current (A) 54+54
No.of MPPT Trackers/No.of Strings MPP Tracker 2/2+2
AC Input/Output Data
Rated AC Input/Output Active Power (W) 14000 15000 16000 18000 20000
Max. AC Input/Output Apparent Power (VA) 15400 16500 17600 19800 22000
Rated AC Input/Output Current (A) 21.3/20.3 22.8/21.8 24.3/23.2 27.3/26.1 30.4/29
Max. AC Input/Output Current (A) 23.4/22.4 25/24 26.7/25.6 30/28.7 33.4/31.9
Max. Continuous AC Passthrough (grid to load) (A) 70
Peak Power (off-grid) (W) 2 times of rated power, 10s
Power Factor Adjustment Range 0.8 leading to 0.8 lagging
Rated Input/Output Voltage 220/380V, 230/400V 0.85Un-1.1Un 3L+N+PE
Rated Input/Output Grid Frequency/Range(Hz) 50/45-55, 60/55-65
Total Current Harmonic Distortion THDi <3% (of nominal power)
DC Component of Grid <0.5% In
Efficiency
Max. Efficiency 97.6%
Euro Efficiency 97.0%
MPPTEfficiency >99%
Equipment Protection
Integrated DC Polarity Reverse Connection Protection, AC Output Overcurrent Protection, Thermal Protection, AC Output Overvoltage Protection, AC Output Short Circuit Protection, DC Component Monitoring, Overvoltage Load Drop Protection, Ground Fault Current Monitoring, Arc Fault Circuit Interrupter (optional), Power Network Monitoring, Island Protection Monitoring, Earth Fault Detection, DC Input Switch, DC Terminal Insulation Impedance Monitoring, Residual Current (RCD) Detection, Surge protection level
Surge Protection Level TYPE II(DC),TYPE II(AC)
Interface
LCD/LED Display LCD
Communication Interface WIFI, RS485, CAN
General Data
Operating Temperature Range (℃) -40 to +60℃, >45℃ Derating
Permissible Ambient Humidity 0-100%
Permissible Altitude 3000m
Noise(dB) ＜60
Ingress Protection(IP) Rating IP 65
Inverter Topology Non-Isolated (solar), Isolated (battery)
Over Voltage Category OVC II(DC), OVC III(AC)
Cabinet Size (WxHxD mm) 456×750×268.5 (Excluding Connectors and Brackets)
Weight (kg) 51.9
Type of Cooling Intelligent Air Cooling
Warranty 5 Years/10 Yearsthe Warranty Period Depends the Final Installation Site of Inverter, More Info Please Refer to Warranty Policy
Grid Regulation IEC 61727, IEC 62116,CEI 0-21, EN 50549, NRS 097, RD 140, UNE 217002,OVE-Richtlinie R25, G99,VDE-AR-N 4105
Safety / EMC Standard IEC/EN 61000-6-1/2/3/4, IEC/EN 62109-1, IEC/EN 62109-2

Twenty kilowatts AC with multi-module 51.2 V parallel stacks pushes combiner boxes, shunt currents, and maintenance complexity. This SKU remains valid when capital must stay in LV ecosystem inventory (HECKMAN RLFP/MLFP, ECOBSS STORE) and roof DC is moderate. Expect heavier DC cabling than 12K models—engineer cross-parallel wiring (positive to first module, negative to last) for balanced strings.

Feature parity with SUN-12K LP3: 50% single-phase asymmetry allowance (10 kW on one leg), GEN-port AC Coupling, up to 10-unit CAN parallel with Master-only BMS CAN, <10 ms load transfer. Peak shaving against 0.35 ₾/kWh B2B tariffs uses the same CT/PLC metering playbook—CHINT DTSU 666 default, Eastron SDM when distance exceeds 30 m.

Above ~40 kWh storage or 30 kW continuous hybrid power, model HV SG01HP3 TCO—including copper tonnage and labor hours. SUN-20K LP3 is the decision point: maximum LV density before RHFP/OASIS HV strings win on BOS.

Ideal for

  • ✓ Commercial clients insisting on 51.2 V HECKMAN/ECOBSS inventory
  • ✓ Three-phase sites needing up to ~20 kW backup without HV switchgear
  • ✓ Engineers comparing LV parallel count vs single HV string

Compatible batteries

Often added together

Technical FAQ

When should I jump to HV instead of this 20K LV?
When stored energy targets exceed ~40 kWh, DC cable runs are long, or parallel module count exceeds maintainability—HV lowers current and combiner count.
Parallel limits?
Up to 10 SG05LP3 units on CAN parallel; battery BMS CAN only on Master; assign sequential Modbus IDs to Slaves.
Compatible batteries?
51.2 V LiFePO₄ only—HECKMAN RLFP/WLFP/MLFP and ECOBSS STORE series. HV RHFP/OASIS are incompatible.
Cable sizing?
Follow Deye manual for 20K DC inputs—typically larger than 12K (approaching 50 mm² class for high continuous charge/discharge).
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