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GoodWe GW9.999K-ETA-G20 ESA Series hybrid inverter

Brand
GoodWe
Model
GW9.999K-ETA-G20
SKU / part number
?
Category
Inverters
chargedreviews.com/inverters/goodwe-gw9-999k-eta-g20

AC output

Continuous output10 kW[1]
Peak outputOff-grid: 11 kVA, 20.0 kVA for 10 s; on-grid: 43.5 kVA[1]
AC configurationThree-phase[1]
AC output voltage220/380 V, 230/400 V, 3L/N/PE[1]
AC frequency50 / 60 Hz[1]
Grid pass-through?
Maximum output per leg?

Battery

Battery voltage750 V[1]
Battery voltage range700 to 950 V[1]
Maximum charge current13.4 A[1]
Maximum discharge current14.7 A[1]
Battery-only output11 kW[1]
Maximum grid charging?
Compatible batteries / BMS?

PV input

PV array limit (connected)?
PV input limit (converted)20 kW[1]
Maximum PV voltage (Voc)1,000 V[1]
MPPT voltage range120 to 950 V[1]
MPPT trackers4[1]
String inputs per MPPT1 / 1 / 1 / 1[1]
PV current per MPPT21 / 21 / 21 / 21[1]
PV short-circuit current26 / 26 / 26 / 26[1]
PV startup voltage150 V[1]

Efficiency and modes

Peak efficiency98.1 %[1]
CEC weighted efficiency97.2 %[1]
Battery conversion efficiency98 %[1]
Grid / off-grid modes?
Generator input?
Transfer time?
Idle consumption?
Night consumption10 W[1]
Parallel units?

Communication and environment

Communications?
Operating temperature-35 to 60 °C[1]
Enclosure ratingIP66[1]
Operating noise?

Mechanical

Dimensions270 D × 800 W × 340 H mm[1]
Weight34 kg / 74.96 lb[1]

Installation (from the manual)

Clearances and orientation

Installation clearances?
Mounting orientationWall/Floor Mounted[1]

Not in the manual: Torque, Conductors, Protection, Grounding, Communication

Page 1 of 2 · Installation values · ? means nothing is recordedAggregated, often community-reported information, not official documentation. Do not rely on it for installation, purchase or compliance decisions; always confirm values with the manufacturer’s official documentation. Charged Reviews accepts no responsibility for errors.

Charged Reviews · Quick reference

GoodWe GW9.999K-ETA-G20 ESA Series hybrid inverter · GW9.999K-ETA-G20

Warranty

Warranty term?
Optional extension?
Coverage starts?
Coverage conditions?
Remedy?
Labor and shipping?
Transfer to another owner?
Registration?
Territory?

Certifications and listings

UL 1741?
UL 1741 SA?
UL 1741 SB?
IEEE 1547?
CA Rule 21?
UL 9540?
FCC Part 15?

Documents and sources

  1. ESA Series 5-30kW user manual (GoodWe, V1.5, 2026-09-04)Official user manual · Revision V1.5 · Revised September 4, 2026 · Checked Sep 29, 2026https://en.goodwe.com/Skippower/downloadFileF?id=3818&mid=60