Growatt MID 36-60KTL3-X3

Compatibility

Monitoring wiring documented; direct data access unverified

The August 2026 manual assigns inverter-monitoring RS485A1/B1 to pins 3/4 and meter RS485A3/B3 to pins 7/8. Its meter Modbus examples do not define a third-party inverter register map, bus coexistence or an Edge read path.

Standard MID 36KTL3-X3, MID 40KTL3-X3, MID 50KTL3-X3 and MID 60KTL3-X3 only. Record the exact nameplate, firmware, regional grid setting, monitoring accessory, meter and occupied connector pins. The 36KTL3-X3 LV and 50/60/70KTL3-X3 MV variants have different electrical specifications and are outside this guide.

Models

Specifications

The August 2026 manual lists four standard three-phase ratings of 36, 40, 50 and 60 kW at nominal 230/400 V. The 36, 40 and 50 kW units have four MPPTs; the 60 kW unit has five. Its separate LV and MV tables must not be applied to these standard variants.^1, 2

Standard models

MID 36, 40, 50 and 60KTL3-X3^1, 2

Rated AC output

36, 40, 50 and 60 kW respectively; nominal three-phase 230/400 V¹

PV trackers and strings

Four MPPTs and eight strings on 36/40/50 kW; five MPPTs and nine strings on 60 kW¹

Monitoring connection

16-pin socket pins 3/4: RS485A1/B1 for inverter monitoring¹

Meter connection

16-pin socket pins 7/8: RS485A3/B3 for the commissioned meter¹

DRMS contacts

Pins 9-12: DRM1/5 through DRM4/8; pin 13 REF/GEN; pin 14 DRM0/COM¹

Optional monitoring

USB-A Shine WiFi, 4G and LAN accessory families listed in section 10.2¹

Enclosure

IP66; 579 × 429 × 224 mm; -25 to +60 °C with derating above 45 °C¹

Interface

Documented measurements and integration boundaries for MID 36-60KTL3-X3.

• The manual's 16-pin communication socket assigns RS485A1/B1 on pins 3/4 to inverter monitoring and RS485A3/B3 on pins 7/8 to meter communication. A wiring pair alone does not specify the inverter's register addresses, access rights or polling limits.
• DRMS uses dry-contact inputs on pins 9-12, REF/GEN on pin 13 and DRM0/COM on pin 14. These are grid-response inputs, not a general-purpose serial or software dispatch API.
• Growatt describes optional USB-A Shine monitoring modules, including WiFi, 4G and LAN types. A module's network uplink does not establish a local Modbus TCP server or grant third-party access.
• The manual discusses SDM630CT-Modbus V3 and other meter communication. Those Modbus details describe the inverter-to-meter arrangement and cannot be copied into an inverter read template.
• A point-of-connection import or export value comes from a correctly installed meter, not from inverter AC production alone. Grid-code settings, export limitation and DRMS contacts remain under the commissioned plant design.

Setup

1. Identify the standard X3 variant

   Record the complete nameplate, firmware and grid code. Check that the suffix does not identify an LV or MV model, and note the installed meter, logger and DRMS wiring.

2. Trace the 16-pin socket

   Use section 10.1 of the manual for the installed hardware. Distinguish monitoring pins 3/4, meter pins 7/8 and dry contacts 9-14 before proposing any independent connection.

3. Obtain the inverter read contract

   Request Growatt's firmware-matched third-party specification covering bus ownership, address, supported functions, register widths, scaling, update rate and coexistence with the existing logger.

4. Define measurement acceptance

   After a read contract is approved, compare candidate inverter power, energy and status with simultaneous inverter values. Use the separately identified site meter for point-of-connection measurements and check signs, units, freshness and loss-of-communications behavior.

5. Keep control under the commissioned design

   Retain grid protection, export limits and DRMS on the installed control scheme. A flexibility connection requires a separate documented control path, authority and fail-safe acceptance.

Common questions

Can Edge read the MID X3 directly over RS-485?

The manual identifies an inverter-monitoring RS-485 pair, but it does not provide the inverter register map, polling or multi-client rules needed to establish an Edge read. Obtain the exact firmware's approved data specification first.¹

Can the meter Modbus examples be used for inverter production?

No. The meter examples describe a separate inverter-to-meter interface on pins 7/8. They do not define inverter production registers on monitoring pins 3/4.¹

Are DRMS contacts a VPP command interface?

The documented DRMS pins are dry-contact grid-response inputs. A VPP dispatch design needs its own authority, command, acknowledgement and fail-safe specification; this guide establishes none of those software functions.¹

Does this page cover MID X3 LV or MV units?

No. The shared manual lists separate LV and MV variants with different voltage and rating tables. Use the complete nameplate and the matching variant documentation rather than transferring standard-model limits.^1, 2