Growatt MID 11-30KTL3-XH

Compatibility

Direct Edge integration not yet verified

The exact-family manual defines physical port roles; Growatt-authored VPP V2.03 defines Modbus RTU identity and telemetry for this model family. The actual endpoint and a local comparison remain installation tasks.

MID 11, 12, 13, 15, 17, 20, 25 and 30KTL3-XH only. Match the complete nameplate, firmware, regional configuration and installed accessories to the applicable manual. MID TL3-X/X2 and MID 8-15KTL3-XH (L) require separate documentation.

Models

Specifications

The family covers eight three-phase ratings from 11 to 30 kW. The 11 to 20 kW models have two MPPTs and the 25 and 30 kW models have three. The current datasheet describes two high-voltage battery ports and APX battery options. Confirm battery compatibility and backup equipment against the installed revision before extending a PV system.²

Models

MID 11, 12, 13, 15, 17, 20, 25 and 30KTL3-XH²

Rated AC power

11, 12, 13, 15, 17, 20, 25 and 30 kW respectively²

MPPTs

Two on 11 to 20 kW models; three on 25 and 30 kW models²

Parallel communication

COM pins 3/4: RS485A1/B1¹

Meter communication

COM pins 5/6: RS485A3/B3¹

Battery communication

Battery 1 pins 7/8; Battery 2 pins 27/28: RS485A2/B2¹

SYN communication

COM pins 23/24: RS485A4/B4; detection on pins 21/22¹

Parallel-system addressing

Addresses 1 to 254; a different address for each inverter¹

Enclosure and temperature

IP66; -25 to +60 °C, with derating above 45 °C in the May 2024 manual¹

Dimensions

579 × 433 × 217.5 mm (W × H × D)²

Interface

Documented measurements and integration boundaries for MID 11-30KTL3-XH.

• FC03 holding 30000: equipment type 5400; holding 30099: protocol version. FC04 input 31100/31101: signed active power at 0.1 W; input 31105: grid frequency at 0.01 Hz. Input 31000 supplies working state and 31005/31007 fault/alarm codes.
• COM pins 3/4 are RS485A1/B1 for parallel communication; pins 5/6 are RS485A3/B3 for the meter. Preserve both roles when surveying the installed system.
• Battery 1 uses RS485A2/B2 on pins 7/8; Battery 2 uses pins 27/28. The SYN backup communication pair is RS485A4/B4 on pins 23/24. These are separate from wake-up and detection signals.
• The documented meter Modbus RTU interfaces belong to the selected meter. They cannot be used as evidence for inverter telemetry, battery registers or a local Ethernet server.
• Export limitation requires the commissioned meter and configuration. Battery dispatch, export limits, reactive power and grid protection settings need their own controls design; this guide provides no write instructions.

Setup

1. Identify the inverter and accessories

   Record the full XH model, firmware, regional settings, meter, battery, SYN box and monitoring accessory. Obtain the corresponding documentation versions before choosing an interface.

2. Trace the COM connector by function

   Use the 30-pin table in section 5.7.1 of the May 2024 manual when it matches the installed unit. Identify the parallel, meter, Battery 1, Battery 2 and SYN cables independently. Keep communication wiring away from power cables.

3. Read identity, power and frequency

   Growatt VPP V2.03 (1 September 2025), Tables 2.1/2.2 and Annex 3-1, is the best-effort starting map. Use the installed serial address and baud rate with 8N1. FC03 holding address 30000 identifies the equipment type; 30099 identifies the protocol version (203 means V2.03). These are wire addresses: add one only if your client uses one-based register numbers. Read power with FC04 input address 31100, two words: PDU 04 79 7C 00 02, excluding slave address and CRC. Decode high-word-first signed INT32 and multiply by 0.1 W. Synthetic bytes 00 01 E2 40 give 12345.6 W; FF FF FF 9C give -10 W. The map defines positive active power as export and negative as import. Read frequency at input address 31105 as UINT16 × 0.01 Hz: 13 88 gives 50 Hz. Compare with simultaneous local monitoring before using the values.

4. Define read acceptance before integration

   Compare the documented VPP power, frequency and state with simultaneous local monitoring. Check signs and units, timestamp each sample and detect communication loss. Use the commissioned grid meter as the separate import/export reference.

5. Retain commissioned control ownership

   Keep export limitation, battery operation and backup switching under the commissioned system. A VPP connection also needs an approved dispatch interface, site permissions and a defined loss-of-communication response.

6. Check the VPP endpoint configuration

   Use the commissioned inverter or logger endpoint. The protocol says VPP authority register 30100 must be enabled; have the installer confirm its existing configuration without exploratory writes. Keep occupied meter, battery, parallel and backup buses intact. This procedure supplies monitoring reads, not an Edge-tested import or permission to dispatch.

Common questions

Does RS-485 mean this inverter supports a direct Modbus connection to Edge?

The published VPP map supplies a useful Modbus RTU starting point for this exact family. Use the visible read procedure and a commissioned endpoint; keep the separate meter, battery and backup pairs in their assigned roles. No Edge field-test result is claimed.^1, 4

Can I use the meter pins to read inverter production?

Pins 5/6 belong to the commissioned meter. Read inverter production through the commissioned inverter or logger endpoint using the VPP map below; keep meter wiring unchanged.¹

Does ShineLan-X provide a local Modbus TCP server?

The manual describes ShineLan-X as an optional datalogger for Growatt cloud and app monitoring. It does not document a local Modbus TCP server. The current datasheet names newer accessory generations, which need their own interface documentation.^1, 2

Can this guide be used for VPP or battery dispatch?

Growatt VPP V2.03 documents the data and control register model for this family. This guide uses its monitoring reads only. Battery and export dispatch require the commissioned meter, authority, limits and loss-of-communication behaviour.^1, 4