Description
Bypassing central NA-Schutz relays while absorbing 45 kWp solar generation.
GoodWe GW29.9K-ET is the 29.9 kW commercial three-phase hybrid inverter factory-capped at 29.9 kVA to bypass mandatory central grid protection (NA-Schutz) under German grid codes.
29.9 kVA certified export cap eliminates central NA-Schutz relay cabinet costs.
45,000 W solar PV input channels massive daytime surplus into battery storage.
Dual 50 A high-voltage battery ports support 100 A combined DC charging.
100% phase-unbalanced output compensates heavy single-phase commercial machinery.
More product details
In Germany and central Europe, exceeding 30.0 kVA triggers mandatory external grid protection switchgear, adding €3,000. €5,000 in hardware and inspection delays.
- Factory firmware limits maximum continuous apparent power to 29,900 VA, streamlining low-voltage utility permitting.
- Eliminates external motorized coupling contactors and dedicated protection cabinets on low-voltage connections.
- Connects up to 45,000 W of rooftop solar, routing generation above 29.9 kW directly into high-voltage storage.
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3 independent trackers with dual-column high-voltage battery integration.
Equipped with 3 independent 30 A MPPT channels and dual 50 A battery inputs, it functions as a complete commercial microgrid hub in a single 54 kg chassis. 3 MPPT channels (6 DC strings, 30 A per MPPT) track East, South, and West warehouse pitches without mismatch losses. Dual high-voltage battery ports charge two independent battery towers simultaneously at up to 30 kW continuous DC power. Dynamic 100% phase balancing shifts power to single-phase workshop equipment without drawing expensive utility electricity.
Runs 29900 W to stay under 30 kVA connection caps
The 29900 W output rating avoids costly grid connection studies at the 30 kVA threshold. Peak solar input reaches 45000 W across three trackers.
Holds 29900 VA backup with 36000 VA overload peak
Continuous backup delivers 29900 VA off-grid with 36000 VA available for 60 seconds. Two 200 to 800 V battery ports supply heavy commercial loads.
Fits six strings in an IP66 smart fan enclosure
Three MPPTs take six strings in a 2/2/2 configuration with 30 A current per tracker. The 54 kg chassis operates up to 4000 m altitude.
Technical data
The short version
29.9 kVA commercial solar power without central NA-Schutz hurdles.
Engineered specifically to maximize commercial rooftop solar generation while remaining strictly beneath the 30 kVA external protection threshold.
- Certified export limit
- 29.9 kVA
- Max. DC solar intake (150%)
- 45 kWp
- Dual 50 A battery ports
- 100 A
- 6 strings (30 A each)
- 3 MPPTs
Power & Phase
- Nominal output power (W)
- 29.9 kW
- Nominal apparent power output to utility grid (VA)
- 29.9 kVA
- Max. apparent power output to utility grid (VA)
- 29.9 kVA
- Max. apparent power from utility grid (VA)
- 30 kVA
- Power factor
- ~1 (adjustable from 0.8 leading to 0.8 lagging)
- Back-up nominal apparent power (VA)
- 29.9 kVA
- Max. output apparent power without grid (VA)
- 30000 (36000 @ 60 s)
- Max. output apparent power with grid (VA)
- 29.9 kVA
PV Input
- Maximum input power (W)
- 45 kW
- Maximum input voltage (V)
- 1000
- MPPT operating voltage range (V)
- 200 ~ 850
- Nominal input voltage (V)
- 620
- Maximum input current per MPPT (A)
- 30
- Maximum short circuit current per MPPT (A)
- 38
- Number of strings per MPPT
- 2 / 2 / 2
- MPPT efficiency
- 99.9%
Battery Interface
- Battery type
- Li-Ion
- Nominal battery voltage (V)
- 500
- Battery voltage range (V)
- 200 ~ 800
- Number of battery inputs
- 2
Efficiency & Protection
- Maximum efficiency
- 98.0%
- European efficiency
- 97.5%
- Maximum battery to AC efficiency
- 97.5%
- MPPT efficiency
- 99.9%
- Cooling method
- Smart fan cooling
- Ingress protection rating
- IP66
Physical & Comms
- Operating temperature range (C)
- -35 ~ +60
- Maximum operating altitude (m)
- 4000
- Communication with BMS
- RS485 / CAN
- Communication with meter
- RS485
- Communication with portal
- WiFi + LAN + Bluetooth
- Dimensions W x H x D (mm)
- 520 x 660 x 220
- Weight (kg)
- 54
Project fit
Where this model fits.
Scenarios that show which projects the GoodWe GW29.9K-ET belongs in, what to verify before quoting, and when another model is the better pick.
German Commercial Roofs (35–45 kWp) on Low-Voltage Grid
Commercial workshops, agricultural barns, and logistics offices in Germany subject to VDE-AR-N 4105 low-voltage connection rules.
When a roof accommodates 35–45 kWp, installing a standard 30 kW inverter (which exports up to 33 kVA) legally mandates an external central NA-Schutz relay cabinet. The GW29.9K-ET delivers virtually identical usable power (29.9 kVA vs 30 kVA), accepts the same 45 kWp solar array, but saves thousands of euros in switchgear and weeks of grid approval delays.
- Confirm the facility connects to the public low-voltage grid (400 V).
- Verify total PV capacity is between 35 and 45 kWp across up to 3 orientations.
- Confirm connected battery capacity is between 30 and 60 kWh across dual ports.
- Verdict: The mandatory economic choice for German commercial solar installations between 30 and 45 kWp.
Commercial Facilities with Asymmetric Single-Phase Machinery
Auto body repair shops, woodcraft workshops, and metal fabrication plants operating heavy single-phase welders or compressors.
Standard inverters divide power equally across three phases (~10 kW per phase). If a machine draws 8 kW on Phase L1 while L2 and L3 draw 1 kW, standard inverters force the business to buy peak electricity on L1. The GW29.9K-ET dynamically supplies up to 10 kW solely on the loaded phase, keeping net grid power draw at zero.
- Install the GoodWe GM330 meter with external 5 A split-core CTs at the main service entrance.
- Verify maximum single-phase load does not exceed 10 kVA.
- Verdict: Eliminates peak demand charges caused by unbalanced single-phase commercial equipment.
Regulatory Cap vs Maximum Power Selection
Deciding between the 29.9 kVA capped model and the 33 kVA maximum output model.
For low-voltage German connections without an existing NA-Schutz cabinet, the 29.9 kW model is the clear winner.
- Check if the site connects to a private medium-voltage transformer station.
- Check if the local grid operator waives external NA-Schutz requirements.
- Verdict: If the facility connects to a private transformer or is located in a country without the 30 kVA NA-Schutz cutoff, step up to the GW30K-ET to gain an extra 10% peak feed-in yield (33.0 kVA max).
Documents
GoodWe ET 15-30kW Series datasheet (EN) GoodWe ET Series 15-30kW Datasheet (EN)Product questions
Why choose the GW29.9K-ET instead of the GW30K-ET?
In Germany (under VDE-AR-N 4105) and several European jurisdictions, systems with total inverter apparent power $>30.0\text{ kVA}$ must install an external central grid protection relay (*Zentraler NA-Schutz*) and external motorized coupling contactors. The GW30K-ET has a maximum apparent power rating of 33.0 kVA and triggers this requirement. The GW29.9K-ET is factory-limited to 29.9 kVA, allowing you to deploy a 45 kWp solar array and large battery storage without the expense, cabinet space, and inspection delays of external NA-Schutz hardware.
If AC export is capped at 29.9 kVA, what happens to extra power from a 45 kWp solar array?
When solar generation reaches 40–45 kW at midday, the inverter exports its maximum allowed 29.9 kVA to the building loads and grid, while simultaneously channeling the remaining 10–15 kW of DC power directly into connected battery storage via its dual 50 A battery ports. No power is clipped or wasted.
Can the dual battery ports be connected to two different battery models?
No. Both battery ports share an internal DC bus architecture. For balanced operation and safe current distribution, both connected battery towers must use the exact same module count, identical nominal voltage, and same cell chemistry (e.g., two identical 20 kWh Lynx D towers).
What smart meter and current transformer (CT) setup is required for this model?
Because commercial service entrances typically carry 100 A to 400 A+, direct-connect meters cannot be used. This model requires a GoodWe GM330 three-phase smart meter paired with 3 external split-core current transformers (5 A secondary, e.g., 200/5 A or 400/5 A depending on the main breaker rating) connected via RS485.
System components
Required components
GoodWe GM330 CT meter
Item number: DLK-GOODWE-GM330
Export limiting / self-consumption metering for grid-tied operation.
Recommended components
GoodWe LX D5.0-10 / Lynx D battery bank
Item number: DLK-GOODWE-LXD5010
Listed by GoodWe against the ET 15-30 kW range (ARM 28 / DSP 12 firmware or higher).
GoodWe GW61.4 / GW112.6-BAT-AC-G10 battery cabinet
Item number: DLK-GOODWE-GW614BATACG10
Listed by GoodWe against the ET 15-30 kW range, ARM 13 or higher required on the inverter.
Optional components
GoodWe GW60KWH-D-10 (60 kWh pack-based unit)
Item number: DLK-GOODWE-GW60KWHD10
This specific model of the Lynx C family is the one GoodWe clears for the ET 15-30 kW tier (the LX C101-10 to LX C156-10 cabinets are cleared for ET 40-50 and ETC/BTC instead).
GoodWe EzManager3000
Item number: DLK-GOODWE-EZMANAGER3000
Single-site home EMS for one hybrid inverter plus EV charger / heat pump / Shelly device control.
Approved pairings
GoodWe GW112.6-BAT-AC-G10Item number DLK-GOODWE-GW1126BATACG10GoodWe requires ARM 13 or higher on the ET 15-30 for the BAT series.
GoodWe GW61.4-BAT-AC-G10Item number DLK-GOODWE-GW614BATACG10GoodWe requires ARM 13 or higher on the ET 15-30 for the BAT series.
GoodWe GW60KWH-D-10Item number DLK-GOODWE-GW60KWHD10GW60KWH-D-10 only. GoodWe does not list LX C101-10 to LX C156-10 against the ET 15-30; those are listed against the ET 40-50 and the ETC / BTC.
GoodWe LX C101-10Item number DLK-GOODWE-LXC10110GW60KWH-D-10 only. GoodWe does not list LX C101-10 to LX C156-10 against the ET 15-30; those are listed against the ET 40-50 and the ETC / BTC.
GoodWe LX C120-10Item number DLK-GOODWE-LXC12010GW60KWH-D-10 only. GoodWe does not list LX C101-10 to LX C156-10 against the ET 15-30; those are listed against the ET 40-50 and the ETC / BTC.
GoodWe LX C138-10Item number DLK-GOODWE-LXC13810GW60KWH-D-10 only. GoodWe does not list LX C101-10 to LX C156-10 against the ET 15-30; those are listed against the ET 40-50 and the ETC / BTC.
GoodWe LX C156-10Item number DLK-GOODWE-LXC15610GW60KWH-D-10 only. GoodWe does not list LX C101-10 to LX C156-10 against the ET 15-30; those are listed against the ET 40-50 and the ETC / BTC.
GoodWe LX D5.0-10Item number DLK-GOODWE-LXD5010GoodWe requires ARM 28 and DSP 12 or higher on the ET for the Lynx D.
GoodWe Lynx D 10 kWh (2 x LX D5.0-10)Item number DLK-GOODWE-LYNXD10KWHGoodWe requires ARM 28 and DSP 12 or higher on the ET for the Lynx D.
GoodWe Lynx D 15 kWh (3 x LX D5.0-10)Item number DLK-GOODWE-LYNXD15KWHGoodWe requires ARM 28 and DSP 12 or higher on the ET for the Lynx D.
GoodWe Lynx D 20 kWh (4 x LX D5.0-10)Item number DLK-GOODWE-LYNXD20KWHGoodWe requires ARM 28 and DSP 12 or higher on the ET for the Lynx D.
GoodWe Lynx D 25 kWh (5 x LX D5.0-10)Item number DLK-GOODWE-LYNXD25KWHGoodWe requires ARM 28 and DSP 12 or higher on the ET for the Lynx D.
GoodWe Lynx Home F 13.10 kWh (PCU base + 4 x LX F3.3-H)Item number DLK-GOODWE-LXF131HGoodWe requires ARM 07 and DSP 06 or higher on the ET 15-30 kW for the Lynx Home F.
GoodWe Lynx Home F 16.38 kWh (PCU base + 5 x LX F3.3-H)Item number DLK-GOODWE-LXF164HGoodWe requires ARM 07 and DSP 06 or higher on the ET 15-30 kW for the Lynx Home F.
GoodWe LX F3.3-H (Lynx Home F battery module, 3.27 kWh)Item number DLK-GOODWE-LXF33HGoodWe requires ARM 07 and DSP 06 or higher on the ET 15-30 kW for the Lynx Home F.
GoodWe Lynx Home F 6.55 kWh (PCU base + 2 x LX F3.3-H)Item number DLK-GOODWE-LXF66HGoodWe requires ARM 07 and DSP 06 or higher on the ET 15-30 kW for the Lynx Home F.
GoodWe Lynx Home F 9.83 kWh (PCU base + 3 x LX F3.3-H)Item number DLK-GOODWE-LXF98HGoodWe requires ARM 07 and DSP 06 or higher on the ET 15-30 kW for the Lynx Home F.
GoodWe Lynx Home F PCU base (master BMS)Item number DLK-GOODWE-LXFPCUGoodWe requires ARM 07 and DSP 06 or higher on the ET 15-30 kW for the Lynx Home F.
Pylontech FH10050Item number DLK-PYLONTECH-FH10050Pylontech Ver. 2.43 lists a Force-H3 stack of 3 to 7 modules, and footnote e restricts this inverter to Force-H3 or Powercube-M1C. Our Force-H3 10.24 kWh is 2 modules and is below the minimum.
Pylontech Force-H3 10.24 kWh (2 x FH10050)Item number DLK-PYLONTECH-FORCEH31024KWHPylontech Ver. 2.43 lists a Force-H3 stack of 3 to 7 modules, and footnote e restricts this inverter to Force-H3 or Powercube-M1C. Our Force-H3 10.24 kWh is 2 modules and is below the minimum.
Pylontech Force-H3 15.36 kWh (3 x FH10050)Item number DLK-PYLONTECH-FORCEH31536KWHPylontech Ver. 2.43 lists a Force-H3 stack of 3 to 7 modules, and footnote e restricts this inverter to Force-H3 or Powercube-M1C. Our Force-H3 10.24 kWh is 2 modules and is below the minimum.
Pylontech Force-H3 20.48 kWh (4 x FH10050)Item number DLK-PYLONTECH-FORCEH32048KWHPylontech Ver. 2.43 lists a Force-H3 stack of 3 to 7 modules, and footnote e restricts this inverter to Force-H3 or Powercube-M1C. Our Force-H3 10.24 kWh is 2 modules and is below the minimum.
Pylontech Force-H3 25.6 kWh (5 x FH10050)Item number DLK-PYLONTECH-FORCEH3256KWHPylontech Ver. 2.43 lists a Force-H3 stack of 3 to 7 modules, and footnote e restricts this inverter to Force-H3 or Powercube-M1C. Our Force-H3 10.24 kWh is 2 modules and is below the minimum.
Pylontech Force-H3 30.72 kWh (6 x FH10050)Item number DLK-PYLONTECH-FORCEH33072KWHPylontech Ver. 2.43 lists a Force-H3 stack of 3 to 7 modules, and footnote e restricts this inverter to Force-H3 or Powercube-M1C. Our Force-H3 10.24 kWh is 2 modules and is below the minimum.
Pylontech Force-H3 35.84 kWh (7 x FH10050)Item number DLK-PYLONTECH-FORCEH33584KWHPylontech Ver. 2.43 lists a Force-H3 stack of 3 to 7 modules, and footnote e restricts this inverter to Force-H3 or Powercube-M1C. Our Force-H3 10.24 kWh is 2 modules and is below the minimum.