Off-grid inverterGW3K-EO-G20
3 kW single-phase off-grid inverter.
- Nominal power
- 3 kW
- MPP trackers
- 1
GoodWe / EO G2 seriesOff-grid inverterSingle-phase off-grid inverter
Off-grid, single-phase.PV, 48 V battery, grid and generator on one inverter.
Inverters / Off-grid
GW5K-EO-G20
Single-phase off-grid inverter · 3 to 6 kW
A single-phase inverter for off-grid and weak-grid sites with a 48 V battery. Select the power class, review the specifications and bring your requirements to VOLFAC.
- Nominal power
- 5 kW
- Battery voltage
- 48 V (40–60 V)
- Max. efficiency
- 98.6 %
- Ingress protection
- IP66
Select power classEO G2 familyEO G2 series, GW3K–GW6K-EO-G20 family
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Product overview
Power for sites where the grid is absent or unreliable.
The GW5K-EO-G20 takes PV on one or two MPP trackers at 21 A per string, charges a 48 V lithium-ion or lead-acid battery and supplies loads through its backup port, switching in 4 ms or less. A grid input and a smart port of up to 8 kVA are provided; GoodWe states generator integration and parallel operation of up to ten units. The enclosure is IP66 and the operating range is −35 °C to +60 °C.
- 21 A per stringOne MPP tracker on the 3 and 3.6 kW models, two on the 5 and 6 kW models; PV input up to twice the nominal power.
- 48 V batteryLithium-ion or lead-acid, 40–60 V, with 70 to 130 A charging and discharging current.
- Switching in ≤ 4 msBackup port with a 10-second overload of 7.2 or 12 kVA off-grid.
- IP66, −35 °C to +60 °CNatural cooling up to 3.6 kW, smart fan cooling on the 5 and 6 kW models.
Technical specifications
Know the details.
GW5K-EO-G20GoodWeFamily EO G2Model GW5K-EO-G20
Brand GoodWeFamily EO G2 series, GW3K–GW6K-EO-G20Selected model GW5K-EO-G20
Battery
- Battery type
- Li-ion or lead-acid
- Nominal voltage
- 48 V
- Voltage range
- 40–60 V
- Start-up voltage
- 44.2 V
- Battery inputs
- 1
- Max. continuous charging current
- 120 A
- Max. continuous discharging current
- 120 A
- Max. charging power
- 5.0 kW
- Max. discharging power
- 5.5 kW
- Communication with BMS
- CAN
PV input
- Max. input power
- 10.0 kW
- Max. input voltage
- 530 V (standby above 500 V, resuming below 490 V)
- MPPT operating voltage range
- 50–480 V
- Start-up voltage
- 60 V
- Nominal input voltage
- 360 V
- MPP trackers
- 2
- Strings per MPP tracker
- 1
- Max. MPPT current
- 21 A / 21 A
- Max. MPPT short-circuit current
- 26 A / 26 A
AC side, grid input
- Nominal power
- 5.0 kW
- Max. power
- 5.5 kW
- Rated apparent power from grid
- 5.0 kVA
- Max. apparent power from grid
- 8.0 kVA
- Nominal voltage
- 220 / 230 V, L / N / PE
- Voltage range
- 170–280 V
- Nominal frequency
- 50 / 60 Hz
- Rated current from grid
- 22.8 A at 220 V; 21.8 A at 230 V
- Max. current from grid
- 35 A
- Power factor
- 0.8 leading to 0.8 lagging
- THDi
- < 3 %
AC side, backup and smart port
- Backup rated apparent power
- 5.0 kVA
- Backup max. apparent power, off-grid
- 5.5 kVA (12 kVA for 10 s)
- Backup max. apparent power, on-grid
- 8 kVA
- Backup max. current
- Off-grid 25 A; on-grid 35 A
- THDv (linear load)
- < 3 %
- On- / off-grid switching time
- ≤ 4 ms
- Smart port max. apparent power
- 8 kVA
- Smart port max. current
- 35 A
Efficiency and protection
- Max. efficiency
- 98.6 %
- European efficiency
- 96.8 %
- MPPT efficiency
- 99.9 %
- Integrated protection
- PV string current monitoring, PV insulation resistance detection, residual current monitoring, PV reverse polarity, anti-islanding, AC overcurrent, AC short circuit, AC overvoltage
- DC surge protection
- Type III
- AC surge protection
- Type II
General data
- Operating temperature
- −35 °C to +60 °C
- Relative humidity
- 0–95 %
- Max. operating altitude
- 3,000 m
- Cooling
- Smart fan cooling
- User interface
- LCD, WLAN and app
- Communication
- RS485, Wi-Fi and Bluetooth; Modbus-RTU
- Ingress protection
- IP66
- Mounting
- Wall mounted
Dimensions and weight
- Dimensions (W × H × D)
- 337 × 456 × 201 mm
- Weight
- < 13 kg
Source: GoodWe product pageGoodWe — EO G2 series product page and the EO G2 datasheet (EN, V2.1, 2 July 2026).
Downloads
Product documents.
- Technical datasheetEO G2 series · English · PDFEO G2 series, GW3K–GW6K-EO-G20 · English · PDF
- User manual, off-grid inverter solutionsEO G2 series · English · PDFEO G2 series, GW3K–GW6K-EO-G20 · English · PDF
- Quick guide, off-grid inverter solutionsEO G2 series · English · PDFEO G2 series, GW3K–GW6K-EO-G20 · English · PDF
- Quick installation guideEO G2 series · Multilingual · PDFEO G2 series, GW3K–GW6K-EO-G20 · Multilingual · PDF
- Certificate IEC 62109EO G2 series · English · PDFEO G2 series, GW3K–GW6K-EO-G20 · English · PDF
Request a quotation.Share your quantity and delivery destination. We reply with a quotation for GW5K-EO-G20, not an order confirmation.
EO G2 familyEO G2 series, GW3K–GW6K-EO-G20 family
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- Nominal power
- 3.6 kW
- MPP trackers
- 1
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- Nominal power
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- MPP trackers
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