GoodWe UT 320/350 kW

Compatibility

GoodWe plant bus documented; direct Edge path unverified

The EMEA datasheet says RS-485 or PLC and Modbus RTU. Manual V1.6 assigns COM2 RS-485 to a daisy chain of UT inverters and a GoodWe smart communication unit or logger; integrated PLC communicates over the AC cable with that unit. No exact-firmware independent client ownership, inverter register map, SCU3000A northbound service, coexistence or write authority is established.

EMEA GW320K-UT, GW320KH-UT, GW350K-UT and GW350KH-UT only. The 250 kW, Korean -KR, HT 100-120 kW and other regional UT variants require separate checks. Preserve the installed nameplate, firmware, grid approval, SCU3000A/logger revision and selected RS-485 or PLC topology.

Models

Specifications

The EMEA product page lists four UT variants at 320/350 kW, with 15 MPPTs on K models and 12 higher-current MPPTs on KH models. The EMEA sheet gives 1500 V maximum PV voltage, 800 V three-phase nominal AC, two strings per tracker, IP66 and full-load operation to 40 °C. It also includes a separate 250 kW variant, excluded here.^2, 3

Exact EMEA variants

GW320K-UT, GW320KH-UT, GW350K-UT and GW350KH-UT^2, 3

PV input

1500 V maximum DC; 480-1500 V MPPT operating range; two strings per tracker²

K versus KH trackers

K: 15 MPPTs at 30 A input/50 A short-circuit each; KH: 12 MPPTs at 40 A/60 A each²

Grid output

800 V, three phase, 3L/PE; confirm 350-class rating against nameplate because EMEA sheet lists 352 kW nominal^1, 2

COM2 RS-485

Pins 1/3 A1, pins 2/4 B1, pins 5/6 grounding; GoodWe inverter/SCU/logger bus¹

RS-485 chain

Under 1000 m cable; at most 20 inverters when more than two connect to a GoodWe communication unit/logger¹

PLC over AC cable

Integrated module to GoodWe unit; up to 1000 m multicore or 800 m single-core cable to box transformer¹

Published protocol

Modbus RTU label in EMEA sheet; no exact third-party point map established^1, 2

Enclosure

IP66; 1120 × 810 × 368 mm; 133 kg; -35 to +60 °C²

Interface

Documented measurements and integration boundaries for UT 320/350 kW.

• Manual V1.6 assigns COM2 pins 1/3 to RS485_A1 and 2/4 to RS485_B1, with pins 5/6 for grounding. It shows those contacts serving other UT inverters or a GoodWe SCU3000A, not an automatically available Edge polling pair.
• For more than two inverters connected to a GoodWe smart unit/logger, the manual limits one RS-485 daisy chain to 20 inverters and under 1000 m of cable. These are vendor plant-network limits, not an Edge or northbound capacity approval.
• The inverter's integrated PLC module sends data over the AC output cable toward the GoodWe smart unit. The manual gives 1000 m with multicore AC cables or 800 m with single-core cable to the box transformer. PLC is not an Ethernet socket at the inverter.
• GoodWe's EMEA datasheet calls this high-speed power-line communication and names Modbus RTU. Neither statement supplies a point map, client arbitration, SCU3000A northbound API, command authorization or external freshness contract.
• The EMEA sheet tabulates 352 kW nominal AC for GW350K-UT/GW350KH-UT, while the model names and manual label the class 350 kW. Use the installed nameplate and grid approval for electrical design; do not infer a dispatch ceiling from the model name.

Setup

1. Identify the regional UT variant

   Record the complete K or KH model, firmware, 800 V AC connection, grid-country certificate and SCU/logger revision. Exclude 250 kW and -KR documentation unless the installed nameplate calls for it.

2. Trace the plant communication design

   Determine whether the installed units use COM2 RS-485 or integrated PLC over AC cabling. Record the chain, termination, cable length, SCU3000A or other GoodWe logger, transformer and network switch.

3. Acquire external-interface evidence

   Ask GoodWe or the EPC for an exact-firmware inverter or SCU northbound specification: approved endpoint, client count, port, addressing, function codes, types, scaling, cadence and network security. Do not place Edge on a vendor bus based on a datasheet protocol label alone.

4. Qualify read-only values

   If GoodWe approves an external read path, compare timestamped AC power, lifetime energy, running state and alarms against the inverter display/SEMS and independent site revenue meter. Check scaling, stale values and missing-unit behavior.

5. Treat controls as separate engineering

   Reactive-power support, export limitation, emergency shutdown and VPP dispatch require a site control matrix, utility permissions, priority rules, acknowledgements and loss-of-link response. This guide authorizes no writes.

Common questions

Can Edge poll a GW350K-UT directly over COM2?

The manual places COM2 on the GoodWe RS-485 plant chain to other inverters or a communications unit. The datasheet says Modbus RTU, but the retained sources do not define an exact-firmware independent-client map or coexistence permission. A direct Edge route is unverified.^1, 2

Does the SCU3000A LAN link expose Modbus TCP or an API?

The manual shows the SCU3000A connected through a network switch to a monitoring platform. It does not define a northbound local service or credentials for this UT installation. Obtain the SCU-specific interface document before proposing an integration.¹

Is HPLC a separate Ethernet network at each inverter?

No. The integrated PLC module communicates over the AC output cable to the GoodWe unit. The manual gives cabling distance limits and a transformer-side topology, not an Ethernet jack or address on each inverter.^1, 3

Are K and KH units electrically interchangeable?

No. The EMEA sheet gives K models 15 MPPTs at 30 A maximum input per tracker and KH models 12 MPPTs at 40 A. Confirm string, cable, fuse and grid design against the exact model and regional documentation.²