Growatt MID 30–50KTL3-X2

Commercial PV inverter

Growatt’s current English sheet covers MID 33/36/40/50KTL3-X2; earlier sources also name the distinct 30KTL3-X2-1. The exact manual separates monitoring, meter and reserved battery terminals, with a different Vietnam connector. Growatt V1.24 supplies a MID/TL3-X best-effort serial, status, AC-power and frequency starting read below.

Growatt MID 30–50KTL3-X2 commercial PV inverter
  • Modbus RTU

Commercial PV inverter

Compatibility

Documented TL3-X monitoring starting map

Growatt’s manufacturer-authored V1.24 map lists MID in the TL3-X family and supplies serial identity, inverter status, AC output power and frequency. The map does not enumerate every newer suffix: confirm the nameplate, returned serial and decoded values against the local display before extending this starting set.

MID 33/36/40/50KTL3-X2 and earlier documented 30KTL3-X2-1, with the installed regional connector identified. Preserve three/four-MPPT ratings, meter/control wiring and USB logger ownership; no physical Edge polling or control command is claimed.

Connect it with

The installed larger MID X2 has an available monitoring connection and responds with the documented TL3-X layout

  • Wired
  • Edge
  • Platforms
Commercial PV inverter
Interface
Gateway
Edge
Output
MID 30–50KTL3-X2MID30–50KTL3-X2 monitoring terminals
Protected EthernetSegmented LAN
ZGW-20 GatewayHosts Edge locally
EpiSensor EdgeProtocol client + point model
Customer platformMQTT · API · files
Ethernet
Protected Ethernet
Runs locally
Optional onward data
On the standard 16-pin connector, monitoring A1/B1 is pins 3/4, reserved BAT A2/B2 is 5/6 and meter A3/B3 is 7/8. The manual’s Vietnam 4-pin figure instead assigns monitoring A1/B1 to 1/2 and meter A2/B2 to 3/4. Identify the installed connector before wiring. Keep one master on the monitoring bus and preserve Shine/SEM, meter and export-control connections. The customer-platform output is optional; Edge remains the local system of record.

Models

Download
ModelsInterfaceRoute into Edge
MID 30KTL3-X2-130 kW, three MPPTs in the older official regional datasheetThe current English datasheet omits this model. Confirm the actual country listing, nameplate, firmware and project approval before selecting it.
MID 33KTL3-X2 and MID 36KTL3-X233 or 36 kW, three MPPTs with two strings per MPPTUse the installed model and current regional grid configuration for its electrical limits.
MID 40KTL3-X2 and MID 50KTL3-X240 or 50 kW, four MPPTs with two strings per MPPTDo not substitute the similar MID X, X3 or XH generations or assume their interface maps apply.

Specifications

Growatt's May 2026 English datasheet is marked preliminary and covers MID 33KTL3-X2, 36KTL3-X2, 40KTL3-X2 and 50KTL3-X2. The first two have three MPPTs and the latter two four, each with two strings per MPPT. It gives 1,100 V maximum DC input and 32 A maximum input per MPPT; check final regional data before design.2

Current English range
33, 36, 40 and 50 kW X2 variants2
Earlier regional model
MID 30KTL3-X2-1, 30 kW, three MPPTs34
PV inputs
Three MPPTs on 33/36 kW; four on 40/50 kW; two strings per MPPT2
Communications
Separate RS485 monitoring and meter pairs; optional USB logger4
Enclosure
IP66; -25 to +60 °C in the May 2026 sheet2
Monitoring accessories
The current sheet names ShineWilan-X2 for one inverter and ShineMaster4G-X or SEM-XA-R for parallel devices2

Interface

Documented measurements and integration boundaries for MID 30–50KTL3-X2.

  • On the standard 16-pin connector, monitoring A1/B1 is pins 3/4, reserved BAT A2/B2 is 5/6 and meter A3/B3 is 7/8. The manual’s Vietnam 4-pin figure instead assigns monitoring A1/B1 to 1/2 and meter A2/B2 to 3/4. Identify the installed connector before wiring. Keep one master on the monitoring bus and preserve Shine/SEM, meter and export-control connections.
  • The USB-A logger path and Growatt Shine monitoring service are distinct from a direct Edge RS485 reading. A named monitoring accessory does not establish its local export contract.
  • The first read uses inverter AC generation and grid frequency; it does not replace independent point-of-connection import/export metering. No Edge import template or control command is provided.

Assessment

MID 33/36/40/50KTL3-X2 plus earlier documented 30KTL3-X2-1, correct regional connector and V1.24 MID/TL3-X starting map. Electrical approvals and control remain with the installed plant.

InteroperabilitySupported with conditions
The exact manuals define monitoring terminals; V1.24 explicitly lists MID/TL3-X registers. Serial identity and local-value comparison qualify the starting set on the installed unit.45
AccuracyNot yet assessed
The map defines unsigned words, AC power scaling and frequency. Installed accuracy and physical polling behavior have not been measured.45
SecurityNot yet assessed
The retained sources do not define third-party authentication, encryption or read-only privilege separation.4
ReliabilityLimited
Electrical and monitoring hardware limits are documented, while third-party client coexistence and stale-data handling need a site test.24
RuggednessSupported with conditions
The current datasheet publishes IP66 and operating-temperature limits; installation must meet those limits.2
ScalabilityLimited
Growatt names single- and multiple-inverter monitoring accessories, but does not guarantee third-party polling capacity.2
LifecycleSupported with conditions
Official X2 documents exist, but the 30 kW document vintage and installed firmware need confirmation.234

Setup

Read MID serial, AC output and frequency

Best-effort TL3-X layout from Growatt V1.24. Use an individually addressed inverter (1–254), the configured serial framing and standard RTU CRC16. Register numbers below are literal PDU offsets, not 40001-style references.

Identity and state
FC03 holding 23, quantity 5: PDU 03 00 17 00 05. Ten serial characters are stored two ASCII characters per word. Compare with the nameplate. FC04 input 0, quantity 1: 04 00 00 00 01; status 0 waiting, 1 normal, 3 fault in this map.
AC output power
FC04 input 35, quantity 3: PDU 04 00 23 00 03. Registers 35/36 are the high/low words of AC output power, unsigned, at 0.1 W per count; 37 is frequency at 0.01 Hz. Join power high word first and multiply by 0.1. Synthetic 00 01 E2 40 gives 123456 × 0.1 = 12345.6 W, not Float 32.
Frequency and bank selection
Synthetic frequency 13 88 is 5000 × 0.01 = 50.00 Hz. This TL3-X table places AC power at 35/36; 11/12 are PV3 voltage/current, not AC power. MIN/TL-X and MOD TL3-XH use other register banks. Compare values with the inverter display rather than silently changing banks.
Response and measurement boundary
The PDUs omit slave address and CRC. If identity fails, check address, framing, polarity and bus ownership first. Keep exceptions, incomplete responses and timeouts unavailable, not zero. AC inverter output is not grid-point import/export; leave meter, DRM, export-limit and grid-protection control with their commissioned owner.

Acceptance: A concrete source-backed first read for the documented MID/TL3-X layout. Physical Edge polling has not been tested. Record installed firmware once and compare the small starting set; a newer suffix may extend the map without invalidating this approach.

  1. Record the exact X2 nameplate

    Capture the full model code including the 30KTL3-X2-1 suffix if present, country grid setting, serial number and firmware. Do not import assumptions from MID X, X3, XH or XL2.

  2. Map the existing monitoring equipment

    On the standard 16-pin connector, monitoring A1/B1 is pins 3/4, reserved BAT A2/B2 is 5/6 and meter A3/B3 is 7/8. The manual’s Vietnam 4-pin figure instead assigns monitoring A1/B1 to 1/2 and meter A2/B2 to 3/4. Identify the installed connector before wiring. Keep one master on the monitoring bus and preserve Shine/SEM, meter and export-control connections.

  3. Start with identity, status and output power

    Use the configured slave address and serial settings. Read holding23–27 for the ten-character serial; compare it with the nameplate. On the TL3-X layout, read input0 status and input35–37 for AC power and frequency. The worked check gives exact PDUs and scaling; compare fresh values with the local display.

  4. Keep power control separate

    The manual's export limitation, CT or meter and DRM/ripple inputs are part of the commissioned plant design. Do not attach a control client or propose active/reactive power writes from this guide.

Common questions

Is MID 30KTL3-X2-1 in the current English datasheet?
No. The May 2026 English table starts at 33 kW. Growatt's earlier regional datasheet and 2023 manual include the 30KTL3-X2-1, so verify current regional availability and project approval for that exact model.234
Can the meter RS485 pair be used as an Edge monitoring port?
Preserve the meter bus. The standard 16-pin drawing uses monitoring 3/4 and meter 7/8; the Vietnam 4-pin drawing uses monitoring 1/2 and meter 3/4. Use the actual connector and the bounded monitoring read below, without adding a second master.45
Does Shine or SEM monitoring prove direct Edge control?
No. Growatt's accessory and cloud monitoring paths are separate systems. Their presence does not establish an Edge register map or write permission for export, grid or reactive-power settings.24
Can the X3 or XH guide supply an X2 point map?
No. Similar MID model names cover different equipment generations and purposes. Select documents by the exact X2 nameplate and firmware.14

Sources

  1. MID 30-50KTL3-X2 product page (opens in a new tab) Growatt
  2. MID 33-50KTL3-X2 English datasheet, May 2026 update (opens in a new tab) (PDF) Growatt
  3. MID 30-50KTL3-X2 regional datasheet (opens in a new tab) (PDF) Growatt
  4. MID 33-50KTL3-X2 installation and operation manual, GR-UM-247-A-01 (opens in a new tab) (PDF) Growatt
  5. Growatt Inverter Modbus RTU Protocol V1.24 (public mirror) (opens in a new tab) Growatt

Further reading

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