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Deye SUN-20K-G05 On-Grid Inverter
SKU
SUN-20K-G05
Brand
Deye
Datasheet (PDF)

Deye SUN-20K-G05 On-Grid Inverter

The Deye SUN-20K-G05 is a three-phase On-Grid inverter for commercial roofs where 20 kW AC is the authorized export tier and storage is deferred.

Tech Specs

Deye SUN-20K-G05 On-Grid Inverter — Tech Specs
Parameter SUN-18K-G05 SUN-20K-G05 SUN-22K-G05 SUN-23K-G05 SUN-25K-G05
PV String Input Data
Max. PV Input Power(kW) 23.4 26 28.6 29.9 32.5
Max. PV Input Voltage(V) 1100
Start-up Voltage(V) 250
MPPT voltage range(V) 200-1000
Rated PV Input voltage(V) 600
Max. Input Short Circuit Current (A) 39+39
Max. Operating PV Input Current(A) 26+26
No. of MPP Trackers/No. of Strings per MPP Tracker 2/2+2
AC Output Side
Rated AC Output Active Power(kW) 18 20 22 23 25
Max. AC Output Apparent Power(kVA) 19.8 22 24.2 25.3 27.5
Rated AC output current (A) 27.3/26.1 30.3/29 33.4/31.9 34.9/33.4 37.9/36.2
Max. AC Output Current(A) 30/28.7 33.3/31.9 36.7/35.1 38.4/36.7 41.7/39.8
Rated output voltage/range (V) 220/380V, 230/400V 0.85Un-1.1Un
Grid Connection Form 3L/N/PE
Rated Output Grid Frequency/range(Hz) 50/45-55, 60/55-65
Power Factor Adjustment Range 0.8 leading to 0.8 lagging
Total Current Harmonic Distortion THDi <3%
DC Injection Current <0.5%ln
Efficiency
Max. Efficiency 98.50%
Euro Efficiency 98%
MPPT Efficiency >99%
Equipment Protection
DC Reverse Polarity Protection Yes
AC Output Overcurrent Protection Yes
AC Output Overvoltage Protection Yes
AC Output Short Circuit Protection Yes
Thermal Protection Yes
Insulation Impedance Detection Yes
DC Component Monitoring Yes
Arc Fault Circuit Interrupter (AFCI) Optional
Anti-islanding Protection Yes
Residual Current Detection Yes
Surge Protection Level TYPE II(DC),TYPE II(AC)
DC Switch Yes
Interface
Communication Interface RS485/RS232
Monitor Mode GPRS/WIFI/Bluetooth/4G/LAN(optional)
General Data
Operating Temperature Range (°C) -25 to +60℃, >45℃ Derating
Permissible Ambient Humidity 0~100%
Permissible Altitude (m) 4000m
Noise (dB) ≤ 50dB(A)
Ingress Protection(IP) Rating IP 65
Inverter Topology Non-Isolated
Over Voltage Category OVC II(DC),OVC III(AC)
Cabinet Size (WxHxD mm) 362mm*527mm*220mm（Excluding connectors and brackets）
Weight [kg] 20
Warranty [year] 5 years
Type Of Cooling Intelligent air cooling
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

At 20 kW AC, cumulative DC currents and conductor sizing already demand professional switchgear—but still far simpler than a 51.2 V battery combiner farm. The G05 series feeds directly into low-voltage commercial switchboards, offsetting compressors, HVAC, and production lines during solar hours.

Without batteries, O&M focuses on MPPT performance, inverter fan hygiene, and periodic export limit verification against utility meters. Revenue models lean on self-consumption at 0.35 ₾/kWh rather than export credits alone—size arrays to load curves, not just roof area.

When policy or reliability later mandates storage, pair this plant with a parallel hybrid feeder or AC-couple a storage inverter on critical loads. Document roof penetration and conduit routes during initial build to simplify retrofit.

Ideal for

  • ✓ Small factories and cold storage with ~20 kW export permits
  • ✓ Hotels balancing pool pumps and kitchen loads during daylight
  • ✓ Investors minimizing CAPEX before proving solar yield

Often added together

Technical FAQ

Hybrid vs this 20K On-Grid?
Choose On-Grid for fastest ROI when outages are rare. Choose Deye SUN-20K-SG05LP3 hybrid when backup or peak shaving is mandatory.
Export limiting?
Configurable in Deye settings to match distributor requirements—verify with live CT feedback after commissioning.
Monitoring?
Wi-Fi/App production data supports O&M contracts; integrate with facility SCADA via Modbus where required.
Ground mount or roof?
Both—size DC wiring for voltage drop; commercial roofs may need multiple MPPT strings per orientation.
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