Growatt MID 11-30KTL3-XH

Compatibility

Direct Edge integration not yet verified

The May 2024 manual assigns distinct RS-485 pairs to parallel, meter, battery and SYN communication. Its Modbus RTU meter specifications do not establish an inverter register map or a third-party client interface.

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.

• The manual describes standby, self-checking, normal, fault and firmware-update states. No third-party addresses or freshness guarantees for these states are established here.
• 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. Obtain the third-party read specification

   Request the manufacturer-approved inverter or logger protocol for the installed firmware. It must identify the physical endpoint, client/server role, addressing, function codes, types, scaling, update interval and coexistence with the existing monitoring system.

4. Define read acceptance before integration

   When an exact read contract is available, compare candidate PV power, energy and status values with simultaneous Growatt display or monitoring readings. Confirm units, signs, timestamps and behaviour when communication is lost. Grid-point import and export need their own meter 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.

Common questions

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

RS-485 describes the documented physical communication interface. The exact-family manual assigns each pair a role but does not provide the inverter register map, read permissions or client coexistence rules needed to establish that connection.¹

Can I use the meter pins to read inverter production?

Pins 5/6 are the inverter-to-meter connection. The manual documents Modbus RTU for selected meters, which does not define inverter production registers. Obtain the inverter or logger specification for third-party readings.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?

It establishes the equipment and communication boundaries, with no verified third-party dispatch path. Export limitation requires a meter and configuration; storage and backup operation depend on the commissioned battery and SYN system. Dispatch requires a separate, documented controls interface.¹