KACO new energy blueplanet 92.0/105/125 TL3

Commercial PV inverter

KACO documents a SunSpec Modbus TCP server for the blueplanet 87.0 to 165 TL3 family. This guide covers the 92.0, 105 and 125 TL3 ratings and read-only monitoring. Write access stays disabled. The separate RS-485 KACO protocol and string-combiner port are not Modbus routes.

  • Modbus TCP
  • SunSpec Modbus
  • KACO RS-485 protocol

Commercial PV inverter

Compatibility

Compatible through documented SunSpec Modbus TCP

The current exact-family manual documents a Modbus TCP server based on SunSpec and a dedicated menu that permits write access to remain disabled.

blueplanet 92.0, 105 or 125 TL3 under the retained manual from firmware 03.59 onward. Use Modbus TCP for read-only monitoring and leave write access disabled.

Connect it with

For read-only monitoring over the permitted plant LAN

  • Modbus
  • Edge
  • Platforms
Commercial PV inverter
Interface
Gateway
Edge
Output
blueplanet 92.0/105/125 TL3blueplanet Ethernet interface
Protected EthernetSegmented LAN
ZGW-20 GatewayHosts Edge locally
EpiSensor EdgeEdge Modbus TCP client
Customer platformMQTT · API · files
Modbus TCP
Protected Ethernet
Runs locally
Optional onward data
Enable Modbus TCP as documented, keep write access disabled and use the SunSpec interface specification matching the installed firmware. The customer-platform output is optional; Edge remains the local system of record.

Models

Download
ModelsInterfaceRoute into Edge
blueplanet 92.0 TL392 kVA class for 400 V gridsRecord exact type code and firmware before discovery.
blueplanet 105 TL3105 kVA class for 380/400/415 V gridsUse only its installed SunSpec model set.
blueplanet 125 TL3125 kVA class for 600 V gridsDo not apply 400 V electrical limits.
Other 87.0-165 TL3 ratingsCovered by the family manual but outside this guideConfirm separately before use.

Specifications

The retained manual covers the blueplanet 87.0 through 165 TL3 platform from firmware 03.59. The 92.0, 105 and 125 TL3 have different grid ratings, so the full type code remains part of the point record.1

Covered ratings
92.0 TL3, 105 TL3 and 125 TL312
PV input
1500 V maximum DC; one MPP tracker12
Ethernet
Two Ethernet connections; TCP/IP and Modbus TCP based on SunSpec1
Serial
Two RS-485 connections using KACO protocol; one is reserved for a string combiner1
Modbus TCP
Default port 502; write access can and should remain disabled for this guide1

Interface

Documented measurements and integration boundaries for blueplanet 92.0/105/125 TL3.

  • Inverter identity, firmware and implemented SunSpec models.
  • AC and DC measurements, energy and operating state where returned by the installed SunSpec profile.
  • Fault and status values where documented for the matching firmware interface.

Assessment

blueplanet 92.0, 105 or 125 TL3 from firmware 03.59, using SunSpec Modbus TCP with writes disabled.

InteroperabilitySupported with conditions
SunSpec Modbus TCP is documented, subject to installed firmware and the matching KACO interface specification.1
AccuracySupported with conditions
The family manual identifies inverter measurements and ratings; the implemented model set must be discovered for the exact firmware.1
SecurityLimited
Modbus TCP lacks transport protection, although the inverter provides a write-access control that can remain disabled.1
ReliabilitySupported with conditions
Operating limits and diagnostics are published; polling recovery and coexistence with site systems require commissioning tests.1
RuggednessSupported with conditions
Enclosure and environmental installation limits are published for the exact family.12
ScalabilitySupported with conditions
Dual Ethernet and network configuration support plant integration, while client count, polling and addressing need a site design.1
LifecycleSupported with conditions
KACO publishes a current revisioned family manual and product material; firmware-specific interface records remain necessary.12

Setup

Discover SunSpec and read inverter power

A best-effort start using the TL3 manual’s conventional SunSpec support and the public SunSpec model definition. Discover the returned models once. The power example applies when model 103 is returned; its address and payload are synthetic.

Endpoint
Enable Network / Modbus TCP / Operation mode, or Network services / Modbus TCP / Operation mode in the device menu/web interface. Retain the configured port (default 502) and unit ID. Leave write access disabled. Use Ethernet on the protected plant LAN; the RS-485 string-combiner link is not this Modbus TCP endpoint.
Signature request
FC03 PDU 03 9C 40 00 02 reads wire address 40000, quantity 2. SunSpec also defines alternate bases 0 and 50000; continue only at the base returning the signature.
Synthetic header
00 01 00 42 means common model 1 with 66 following data registers. At wire header 40002, the next model begins at 40002 + 2 + 66 = 40070. For each subsequent header, next = H + L + 2. Continue until ID 65535; record the header of model 103 if present.
Representation check
00 67 means model 103; 00 71 means model 113. Their layouts differ. Use the model actually returned, not the synthetic header as a fixed layout.
Conditional power request
For returned SunSpec model 103 only, let H be its discovered header address. FC03 at H + 14, quantity 2, reads signed int16 W and signed W_SF. If H = 40070, read wire address 40084 (0x9C94), PDU 03 9C 94 00 02. This is an example header position; models 113/203/213 use their own layouts.
Signed scaling example
Synthetic bytes 30 39 FF FF decode to W = 12345 and W_SF = -1: 12345 × 10^-1 = 1234.5 W. These are two signed integer registers, not Float32. Value 0x8000 means unavailable, not zero. Compare decoded power with the inverter interface.
Signed scaling example
For model 103, frequency is H+16 and its signed scale factor H+17. Compare identity, fresh AC power and frequency with the inverter interface before expanding voltage/current/energy points. If another model is returned, decode that model’s own layout. Keep inverter production distinct from site import/export.

Acceptance: Use discovery and a display comparison as the first commissioning check. The firmware-specific KACO files help expand vendor points, but standard model discovery provides a starting read without waiting for them. No control writes or physical Edge test are claimed.

  1. Confirm type and firmware

    Record the full nameplate type, grid voltage, serial number and firmware. This guide begins at firmware 03.59 and does not cover similarly named North American variants.

  2. Keep writes disabled

    In the Modbus TCP menu, enable only the server operation needed for monitoring. Leave write access disabled and preserve power-control, grid and protection settings.

  3. Use the Ethernet route

    Connect through the permitted protected plant LAN and configured TCP port. Do not repurpose the RS-485 string-combiner connection or describe the KACO serial protocol as Modbus RTU.

  4. Discover the installed models

    A best-effort start using the TL3 manual’s conventional SunSpec support and the public SunSpec model definition. Discover the returned models once. The power example applies when model 103 is returned; its address and payload are synthetic.

  5. Verify a live read

    For model 103, frequency is H+16 and its signed scale factor H+17. Compare identity, fresh AC power and frequency with the inverter interface before expanding voltage/current/energy points. If another model is returned, decode that model’s own layout. Keep inverter production distinct from site import/export.

Sources

  1. blueplanet 87.0-165 TL3 operating manual, Q2 2026 (opens in a new tab) KACO new energy
  2. blueplanet 87.0 TL3 to 125 TL3 product page (opens in a new tab) KACO new energy
  3. SunSpec three-phase inverter model 103 definition (opens in a new tab) SunSpec Alliance

Further reading

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