Solar inverters

KOSTAL PIKO IQ / PLENTICORE plus Modbus register map

KOSTAL Modbus TCP interface of PIKO IQ and PLENTICORE inverters, covering the native register table with live AC, DC, battery and power meter values, yields, setpoints for active and reactive power, external battery management, battery limitation and plant (Multi Device Control) registers. The document also describes a SunSpec interface (models 1, 103, 113, 120, 123, 160, 203, 802); its model contents are not tabulated there, so no SunSpec rows are included. Availability of individual registers depends on the model and software version, see the notes.

Protocol
Modbus TCP
Defaults
TCP port 1502 and unit ID 71 (modifiable) by default. Function codes 0x03, 0x06 and 0x10 (1 to 2 registers per write) are supported. KOSTAL recommends a polling time of more than 1 s (p. 9, 10, 18).
Addresses in the manual
0-based protocol addresses, as sent on the wire
32 and 64-bit values
Low word first (CD AB)
Registers listed
171
Checked against
Revision version 2.9, release date 17.07.2026 (document DOC02308910-0020), hosted by KOSTAL. Valid from PIKO/PLENTICORE G1 UI 01.30.12092, PLENTICORE G2 SW 02.15.xxxxx, PLENTICORE G3 and MP G3 SW 3.07.00.xxxxx

Address base. The tables print each address in hex and decimal (for example 0x06 = 6, 0x9DEC = 40428). The document states that registers in the PDU are addressed starting at zero, so registers numbered 1 to 16 are addressed 0 to 15 (p. 10), and its register tables give the hex address range 0x0000 to 0xFFFF for requests. It gives no worked example that ties a table row to a request, so confirm with a known register, for example the serial number at 14. This file lists the decimal address from the table. Address 2 in the manual is address 2 on the wire.

Word order. The default is little-endian (CDAB) standard Modbus; register 5 (Modbus Byte Order) or the inverter setting Settings, Modbus/SunSpec (TCP) switches to big-endian (ABCD) SunSpec. It applies to float-formatted registers (p. 9, 23). The document does not say separately whether it also applies to 32-bit integer registers; check a known value.

Modbus Poll and the Modbus protocol itself count from 0. The "Wire address" column is the number to type into Modbus Poll.

Downloads

Register table (CSV) Modbus Poll blocks (CSV) Modbus Poll template (JSON)

The register table has every column on this page. The blocks file imports into Modbus Poll. The template JSON holds the same blocks plus unit, scale and access for scripts.

Registers

171 registers
Manual Wire Register Type Regs Unit Scale Access Area
2 2 Modbus enableModbus_Enable bool 1 1 RW Holding (FC03)
4 4 Modbus unit IDModbus_Unit_ID · Default unit ID is 71; the manual says it is modifiable. uint16 1 1 RW Holding (FC03)
5 5 Modbus byte order for float registersModbus_Byte_Order · 0x00 = little-endian (CDAB), 0x01 = big-endian (ABCD). Applies to float-formatted registers (note 7). The setting is also under Settings, Modbus/SunSpec (TCP) (p. 9). uint16 1 1 RW Holding (FC03)
6 6 Inverter article numberInverter_Article_Number string 8 1 R Holding (FC03)
14 14 Inverter serial numberInverter_Serial_Number string 8 1 R Holding (FC03)
30 30 Number of bidirectional convertersNumber_Of_Bidirectional_Converters uint16 1 1 R Holding (FC03)
32 32 Number of AC phasesNumber_Of_AC_Phases uint16 1 1 R Holding (FC03)
34 34 Number of PV stringsNumber_Of_PV_Strings uint16 1 1 R Holding (FC03)
38 38 Software version of main controller (MC)Software_Version_Maincontroller string 8 1 R Holding (FC03)
46 46 Software version of IO controller (IOC)Software_Version_IO_Controller string 8 1 R Holding (FC03)
54 54 Power IDPower_ID uint32 2 1 R Holding (FC03)
56 56 Inverter stateInverter_State · Inverter state (note 2): 0 Off, 1 Init, 2 IsoMeas, 3 GridCheck, 4 StartUp, 5 not named, 6 FeedIn, 7 Throttled, 8 ExtSwitchOff, 9 Update, 10 Standby, 11 GridSync, 12 GridPreCheck, 13 GridSwitchOff, 14 Overheating, 15 Shutdown, 16 ImproperDcVoltage, 17 ESB, 18 Unknown. uint32 2 1 R Holding (FC03)
58 58 Overall software version (UI / SW)Overall_Software_Version · Only PLENTICORE plus G2 and PLENTICORE (MP, BI) G3 (note 11). string 13 1 R Holding (FC03)
98 98 Temperature of controller PCBController_PCB_Temperature float32 2 degC 1 R Holding (FC03)
100 100 Total DC powerTotal_DC_Power float32 2 W 1 R Holding (FC03)
104 104 State of energy managerEnergy_Manager_State · Internal energy flow state (note 3): 0x00 Idle, 0x02 Emergency Battery Charge, 0x08 Winter Mode Step 1, 0x10 Winter Mode Step 2; 0x01 and 0x04 are listed as n/a. uint32 2 1 R Holding (FC03)
106 106 Home own consumption from batteryHome_Consumption_From_Battery · Actual power consumed by the home and provided from the battery (note 8). float32 2 W 1 R Holding (FC03)
108 108 Home own consumption from gridHome_Consumption_From_Grid · Actual power consumed by the home and provided from the grid (note 8). float32 2 W 1 R Holding (FC03)
110 110 Total home consumption from batteryTotal_Home_Consumption_Battery · Total energy consumed by the home and provided from the battery (note 8). float32 2 Wh 1 R Holding (FC03)
112 112 Total home consumption from gridTotal_Home_Consumption_Grid · Total energy consumed by the home and provided from the grid (note 8). float32 2 Wh 1 R Holding (FC03)
114 114 Total home consumption from PVTotal_Home_Consumption_PV · Total energy consumed by the home and provided from PV (note 8). float32 2 Wh 1 R Holding (FC03)
116 116 Home own consumption from PVHome_Consumption_From_PV · Actual power consumed by the home and provided from PV (note 8). float32 2 W 1 R Holding (FC03)
118 118 Total home consumptionTotal_Home_Consumption · Sum of all energy consumed by the home from battery, grid and PV (note 8). float32 2 Wh 1 R Holding (FC03)
120 120 Isolation resistanceIsolation_Resistance float32 2 Ohm 1 R Holding (FC03)
122 122 Power limit from EVUPower_Limit_From_EVU float32 2 % 1 R Holding (FC03)
124 124 Total home consumption rateTotal_Home_Consumption_Rate float32 2 % 1 R Holding (FC03)
144 144 WorktimeWorktime float32 2 s 1 R Holding (FC03)
150 150 Actual cos phiActual_Cos_Phi float32 2 1 R Holding (FC03)
152 152 Grid frequencyGrid_Frequency float32 2 Hz 1 R Holding (FC03)
154 154 Current phase 1Current_Phase_1 float32 2 A 1 R Holding (FC03)
156 156 Active power phase 1Active_Power_Phase_1 float32 2 W 1 R Holding (FC03)
158 158 Voltage phase 1Voltage_Phase_1 float32 2 V 1 R Holding (FC03)
160 160 Current phase 2Current_Phase_2 float32 2 A 1 R Holding (FC03)
162 162 Active power phase 2Active_Power_Phase_2 float32 2 W 1 R Holding (FC03)
164 164 Voltage phase 2Voltage_Phase_2 float32 2 V 1 R Holding (FC03)
166 166 Current phase 3Current_Phase_3 float32 2 A 1 R Holding (FC03)
168 168 Active power phase 3Active_Power_Phase_3 float32 2 W 1 R Holding (FC03)
170 170 Voltage phase 3Voltage_Phase_3 float32 2 V 1 R Holding (FC03)
172 172 Total AC active powerTotal_AC_Active_Power float32 2 W 1 R Holding (FC03)
174 174 Total AC reactive powerTotal_AC_Reactive_Power float32 2 Var 1 R Holding (FC03)
178 178 Total AC apparent powerTotal_AC_Apparent_Power float32 2 VA 1 R Holding (FC03)
190 190 Battery charge currentBattery_Charge_Current float32 2 A 1 R Holding (FC03)
194 194 Number of battery cyclesBattery_Cycles float32 2 1 R Holding (FC03)
200 200 Actual battery charge (-) / discharge (+) currentBattery_Current_Actual float32 2 A 1 R Holding (FC03)
202 202 PSSB fuse statePSSB_Fuse_State · Listed as Float format (note 5): 0x00 Fuse fail, 0x01 Fuse ok, 0xFF Unchecked. float32 2 1 R Holding (FC03)
208 208 Battery ready flagBattery_Ready_Flag · Listed as Float format. float32 2 1 R Holding (FC03)
210 210 Actual state of charge (SoC)Battery_State_Of_Charge float32 2 % 1 R Holding (FC03)
214 214 Battery temperatureBattery_Temperature float32 2 degC 1 R Holding (FC03)
216 216 Battery voltageBattery_Voltage float32 2 V 1 R Holding (FC03)
218 218 Cos phi (powermeter)Powermeter_Cos_Phi float32 2 1 R Holding (FC03)
220 220 Frequency (powermeter)Powermeter_Frequency float32 2 Hz 1 R Holding (FC03)
222 222 Current phase 1 (powermeter)Powermeter_Current_Phase_1 float32 2 A 1 R Holding (FC03)
224 224 Active power phase 1 (powermeter)Powermeter_Active_Power_Phase_1 float32 2 W 1 R Holding (FC03)
226 226 Reactive power phase 1 (powermeter)Powermeter_Reactive_Power_Phase_1 float32 2 Var 1 R Holding (FC03)
228 228 Apparent power phase 1 (powermeter)Powermeter_Apparent_Power_Phase_1 float32 2 VA 1 R Holding (FC03)
230 230 Voltage phase 1 (powermeter)Powermeter_Voltage_Phase_1 float32 2 V 1 R Holding (FC03)
232 232 Current phase 2 (powermeter)Powermeter_Current_Phase_2 float32 2 A 1 R Holding (FC03)
234 234 Active power phase 2 (powermeter)Powermeter_Active_Power_Phase_2 float32 2 W 1 R Holding (FC03)
236 236 Reactive power phase 2 (powermeter)Powermeter_Reactive_Power_Phase_2 float32 2 Var 1 R Holding (FC03)
238 238 Apparent power phase 2 (powermeter)Powermeter_Apparent_Power_Phase_2 float32 2 VA 1 R Holding (FC03)
240 240 Voltage phase 2 (powermeter)Powermeter_Voltage_Phase_2 float32 2 V 1 R Holding (FC03)
242 242 Current phase 3 (powermeter)Powermeter_Current_Phase_3 float32 2 A 1 R Holding (FC03)
244 244 Active power phase 3 (powermeter)Powermeter_Active_Power_Phase_3 float32 2 W 1 R Holding (FC03)
246 246 Reactive power phase 3 (powermeter)Powermeter_Reactive_Power_Phase_3 float32 2 Var 1 R Holding (FC03)
248 248 Apparent power phase 3 (powermeter)Powermeter_Apparent_Power_Phase_3 float32 2 VA 1 R Holding (FC03)
250 250 Voltage phase 3 (powermeter)Powermeter_Voltage_Phase_3 float32 2 V 1 R Holding (FC03)
252 252 Total active power (powermeter)Powermeter_Total_Active_Power · Sensor position 1 (home consumption): (+) house consumption, (-) generation. Sensor position 2 (grid connection): (+) power supply, (-) feed-in. float32 2 W 1 R Holding (FC03)
254 254 Total reactive power (powermeter)Powermeter_Total_Reactive_Power · Sensor position 2 (grid connection): (+) power supply, (-) feed-in. Sensor position 1 (home consumption): (+) house consumption, (-) generation. float32 2 Var 1 R Holding (FC03)
256 256 Total apparent power (powermeter)Powermeter_Total_Apparent_Power · Sensor position 2 (grid connection): (+) power supply, (-) feed-in. Sensor position 1 (home consumption): (+) house consumption, (-) generation. float32 2 VA 1 R Holding (FC03)
258 258 Current DC1DC1_Current float32 2 A 1 R Holding (FC03)
260 260 Power DC1DC1_Power float32 2 W 1 R Holding (FC03)
266 266 Voltage DC1DC1_Voltage float32 2 V 1 R Holding (FC03)
268 268 Current DC2DC2_Current float32 2 A 1 R Holding (FC03)
270 270 Power DC2DC2_Power float32 2 W 1 R Holding (FC03)
276 276 Voltage DC2DC2_Voltage float32 2 V 1 R Holding (FC03)
278 278 Current DC3DC3_Current float32 2 A 1 R Holding (FC03)
280 280 Power DC3DC3_Power float32 2 W 1 R Holding (FC03)
286 286 Voltage DC3DC3_Voltage float32 2 V 1 R Holding (FC03)
320 320 Total yieldTotal_Yield float32 2 Wh 1 R Holding (FC03)
322 322 Daily yieldDaily_Yield float32 2 Wh 1 R Holding (FC03)
324 324 Yearly yieldYearly_Yield float32 2 Wh 1 R Holding (FC03)
326 326 Monthly yieldMonthly_Yield float32 2 Wh 1 R Holding (FC03)
384 384 Inverter network nameInverter_Network_Name string 32 1 R Holding (FC03)
416 416 IP enableIP_Enable uint16 1 1 R Holding (FC03)
418 418 Manual IP / Auto-IPManual_IP_Auto_IP uint16 1 1 R Holding (FC03)
420 420 IP addressIP_Address string 8 1 R Holding (FC03)
428 428 IP subnet maskIP_Subnetmask string 8 1 R Holding (FC03)
436 436 IP gatewayIP_Gateway string 8 1 R Holding (FC03)
444 444 IP auto DNSIP_Auto_DNS uint16 1 1 R Holding (FC03)
446 446 IP DNS 1IP_DNS1 string 8 1 R Holding (FC03)
454 454 IP DNS 2IP_DNS2 string 8 1 R Holding (FC03)
512 512 Battery gross capacityBattery_Gross_Capacity uint32 2 Ah 1 R Holding (FC03)
514 514 Battery actual SOCBattery_Actual_SOC uint16 1 % 1 R Holding (FC03)
515 515 Firmware version of main controller (MC)Firmware_Maincontroller uint32 2 1 R Holding (FC03)
517 517 Battery manufacturerBattery_Manufacturer string 8 1 R Holding (FC03)
527 527 Battery serial numberBattery_Serial_Number uint32 2 1 R Holding (FC03)
529 529 Work capacityBattery_Work_Capacity uint32 2 Wh 1 R Holding (FC03)
531 531 Inverter max powerInverter_Max_Power · Apply the scale factor in register 532 (note 4). uint16 1 W 1 R Holding (FC03)
532 532 Inverter max power scale factorInverter_Max_Power_Scale_Factor · Format is not given in the table row; note 4 describes scale factors as 16-bit two's complement integers in the range -10 to 10. int16 1 1 R Holding (FC03)
533 533 Active power setpointActive_Power_Setpoint · Section 3.3 gives range 1 to 100 and function code 0x06 only, and says the value is not stored and is discarded when the inverter powers on or resets (p. 24). uint16 1 % 1 RW Holding (FC03)
535 535 Inverter manufacturerInverter_Manufacturer string 16 1 R Holding (FC03)
559 559 Inverter serial number (16 registers)Inverter_Serial_Number_2 string 16 1 R Holding (FC03)
575 575 Inverter generation power (actual)Inverter_Generation_Power · Apply the power scale factor in register 576 (note 4). int16 1 W 1 R Holding (FC03)
576 576 Power scale factorPower_Scale_Factor · Format is not given in the table row; note 4 describes scale factors as 16-bit two's complement integers in the range -10 to 10. int16 1 1 R Holding (FC03)
577 577 Generation energyGeneration_Energy · Apply the energy scale factor in register 579 (note 4). uint32 2 Wh 1 R Holding (FC03)
579 579 Energy scale factorEnergy_Scale_Factor · Format is not given in the table row; note 4 describes scale factors as 16-bit two's complement integers in the range -10 to 10. int16 1 1 R Holding (FC03)
582 582 Actual battery charge/discharge powerBattery_Charge_Discharge_Power_Actual int16 1 W 1 R Holding (FC03)
583 583 Reactive power setpointReactive_Power_Setpoint · Section 3.3 gives range -100 to 100 and function code 0x06 only, and says the value is not stored and is discarded when the inverter powers on or resets (p. 24). int16 1 % 1 RW Holding (FC03)
585 585 Delta cos phi setpointDelta_Cos_Phi_Setpoint · Range -32768 to 32767 maps to -1.0 to +1.0. A negative value is underexcited, a positive value is overexcited. Example: -1638 gives cos phi 0.95 underexcited, +3276 gives 0.90 overexcited; the maximum setting range is -26214 to 26214 (cos phi 0.80). Section 3.3 lists function code 0x06 only and says the value is not stored (p. 24). int16 1 1 RW Holding (FC03)
586 586 Battery firmwareBattery_Firmware uint32 2 1 R Holding (FC03)
588 588 Battery typeBattery_Type · Note 6: 0x0000 no battery (PV functionality), 0x0002 PIKO Battery Li, 0x0004 BYD, 0x0008 BMZ, 0x0010 AXIstorage Li SH, 0x0040 LG, 0x0200 Pylontech, 0x0400 AXIstorage Li SV, 0x1000 Dyness, 0x2000 VARTA, 0x4000 ZYC, 0x8000 HELIVOR, 0x10000 M-TEC (only PLENTICORE G3). The last value does not fit in 16 bits as printed. uint16 1 1 R Holding (FC03)
608 608 I/O board switched output 1IO_Board_Switched_Output_1 uint16 1 1 RW Holding (FC03)
609 609 I/O board switched output 2IO_Board_Switched_Output_2 uint16 1 1 RW Holding (FC03)
610 610 I/O board switched output 3IO_Board_Switched_Output_3 uint16 1 1 RW Holding (FC03)
611 611 I/O board switched output 4IO_Board_Switched_Output_4 uint16 1 1 RW Holding (FC03)
768 768 Product name (for example PLENTICORE plus)Product_Name string 32 1 R Holding (FC03)
800 800 Power class (for example 10)Power_Class string 32 1 R Holding (FC03)
832 832 Low-priority active power setpointLow_Priority_Active_Power_Setpoint · Range 0 to 65535; supported with software version 1.30 or greater. Setpoint [W] = register 832 x 10^(register 833). Function code 0x06 only. Not stored over a power cycle (section 3.3). uint16 1 W 1 W Holding (FC03)
833 833 Low-priority active power setpoint scale factorLow_Priority_Active_Power_Setpoint_Scale_Factor · Table format is S8 in one register; note 3 says scale factors are 8-bit two's complement integers in the range -10 to 10. Read it first. int16 1 1 R Holding (FC03)
1024 1024 Battery charge power (AC) setpointBattery_Charge_Power_AC_Setpoint · Negative values charge the battery, positive values discharge it. Setpoint [W] = register 1024 x 10^(register 1025). Only PLENTICORE BI and PLENTICORE (MP) G3. int16 1 W 1 W Holding (FC03)
1025 1025 Power scale factor for battery charge power setpointBattery_Power_Scale_Factor · Table format is S16; note 2 says scale factors are 8-bit two's complement integers in the range -10 to 10. Read it first. Only PLENTICORE BI and PLENTICORE (MP) G3. int16 1 1 R Holding (FC03)
1026 1026 Battery charge power (AC) setpoint, absoluteBattery_Charge_Power_AC_Setpoint_Absolute · Negative values charge the battery, positive values discharge it. Only PLENTICORE BI and PLENTICORE (MP) G3. float32 2 W 1 RW Holding (FC03)
1028 1028 Battery charge current (DC) setpoint, relativeBattery_Charge_Current_DC_Setpoint_Relative · Relative to the nominal value. Negative values charge the battery, positive values discharge it. Access can be unavailable in Denmark and, for the gradient case (10 minutes), in Austria (note 7). float32 2 % 1 RW Holding (FC03)
1030 1030 Battery charge power (AC) setpoint, relativeBattery_Charge_Power_AC_Setpoint_Relative · Relative to the nominal value. Negative values charge the battery, positive values discharge it. Only PLENTICORE BI and PLENTICORE (MP) G3. float32 2 % 1 RW Holding (FC03)
1032 1032 Battery charge current (DC) setpoint, absoluteBattery_Charge_Current_DC_Setpoint_Absolute · Negative values charge the battery, positive values discharge it. Access can be unavailable in Denmark and, for the gradient case (10 minutes), in Austria (note 7). float32 2 A 1 RW Holding (FC03)
1034 1034 Battery charge power (DC) setpoint, absoluteBattery_Charge_Power_DC_Setpoint_Absolute · Negative values charge the battery, positive values discharge it. Access can be unavailable in Denmark and, for the gradient case (10 minutes), in Austria (note 7). float32 2 W 1 RW Holding (FC03)
1036 1036 Battery charge power (DC) setpoint, relativeBattery_Charge_Power_DC_Setpoint_Relative · Relative to the nominal value. Negative values charge the battery, positive values discharge it. Access can be unavailable in Denmark and, for the gradient case (10 minutes), in Austria (note 7). float32 2 % 1 RW Holding (FC03)
1038 1038 Battery max. charge power limit, absoluteBattery_Max_Charge_Power_Limit_Absolute float32 2 W 1 RW Holding (FC03)
1040 1040 Battery max. discharge power limit, absoluteBattery_Max_Discharge_Power_Limit_Absolute float32 2 W 1 RW Holding (FC03)
1042 1042 Minimum SOCMinimum_SOC float32 2 % 1 RW Holding (FC03)
1044 1044 Maximum SOCMaximum_SOC float32 2 % 1 RW Holding (FC03)
1046 1046 Total DC charge energy (DC side to battery)Total_DC_Charge_Energy float32 2 Wh 1 R Holding (FC03)
1048 1048 Total DC discharge energy (DC side from battery)Total_DC_Discharge_Energy float32 2 Wh 1 R Holding (FC03)
1050 1050 Total AC charge energy (AC side to battery)Total_AC_Charge_Energy_AC_Side float32 2 Wh 1 R Holding (FC03)
1052 1052 Total AC discharge energy (battery to grid)Total_AC_Discharge_Energy float32 2 Wh 1 R Holding (FC03)
1054 1054 Total AC charge energy (grid to battery)Total_AC_Charge_Energy_Grid float32 2 Wh 1 R Holding (FC03)
1056 1056 Total DC PV energy (sum of all PV inputs)Total_DC_PV_Energy float32 2 Wh 1 R Holding (FC03)
1058 1058 Total DC energy from PV1Total_DC_Energy_From_PV1 float32 2 Wh 1 R Holding (FC03)
1060 1060 Total DC energy from PV2Total_DC_Energy_From_PV2 float32 2 Wh 1 R Holding (FC03)
1062 1062 Total DC energy from PV3Total_DC_Energy_From_PV3 float32 2 Wh 1 R Holding (FC03)
1064 1064 Total energy AC side to gridTotal_Energy_AC_Side_To_Grid float32 2 Wh 1 R Holding (FC03)
1066 1066 Total DC power (sum of all PV inputs)Total_DC_Power_Sum_PV float32 2 W 1 R Holding (FC03)
1068 1068 Battery work capacityBattery_Work_Capacity_Float float32 2 Wh 1 R Holding (FC03)
1070 1070 Battery serial numberBattery_Serial_Number_2 uint32 2 1 R Holding (FC03)
1076 1076 Maximum charge power limit (read out from battery)Battery_Max_Charge_Power_Limit_From_Battery float32 2 W 1 R Holding (FC03)
1078 1078 Maximum discharge power limit (read out from battery)Battery_Max_Discharge_Power_Limit_From_Battery float32 2 W 1 R Holding (FC03)
1080 1080 Battery management modeBattery_Management_Mode · Table format is U8 in one register. Note 4: 0x00 no external battery management, 0x01 external battery management via digital I/O, 0x02 external battery management via MODBUS. uint16 1 1 R Holding (FC03)
1082 1082 Installed sensor typeInstalled_Sensor_Type · Table format is U8 in one register. Note 5: 0x00 SDM 630, 0x01 B-Control EM-300 LR, 0x03 KSEM, 0x04 KEM-C, 0x05 KEM-P, 0x06 KEM MP-P, 0xFF no sensor; 0x02 is reserved. uint16 1 1 R Holding (FC03)
1280 1280 Max battery charge powerMax_Battery_Charge_Power · Only PLENTICORE G3 from software version 03.05.xxxxx. Once written it must be rewritten cyclically; otherwise the fallback limits in registers 1284 and 1286 become active after the fallback time in register 1288. float32 2 W 1 RW Holding (FC03)
1282 1282 Max battery discharge powerMax_Battery_Discharge_Power · Only PLENTICORE G3 from software version 03.05.xxxxx. Once written it must be rewritten cyclically; otherwise the fallback limits in registers 1284 and 1286 become active after the fallback time in register 1288. float32 2 W 1 RW Holding (FC03)
1284 1284 Max battery charge power (fallback case)Max_Battery_Charge_Power_Fallback · Only PLENTICORE G3 from software version 03.05.xxxxx. float32 2 W 1 RW Holding (FC03)
1286 1286 Max battery discharge power (fallback case)Max_Battery_Discharge_Power_Fallback · Only PLENTICORE G3 from software version 03.05.xxxxx. float32 2 W 1 RW Holding (FC03)
1288 1288 Time until fallbackTime_Until_Fallback · Value range 30 to 10800 seconds. Only PLENTICORE G3 from software version 03.05.xxxxx. uint32 2 s 1 RW Holding (FC03)
1545 1545 MDC roleMDC_Role · Values: 0 = off, 1 = client, 2 = host, -1 = MDC not available. Plant registers are available in PLENTICORE G3 inverters with a HOST role from software version 3.06.10. int16 1 1 R Holding (FC03)
1547 1547 Plant state of charge (SoC), capacity-weightedPlant_State_Of_Charge float32 2 % 1 R Holding (FC03)
1549 1549 Plant total battery power (sum)Plant_Total_Battery_Power · Negative values indicate battery charging; positive values indicate battery discharging. float32 2 W 1 R Holding (FC03)
1551 1551 Plant total PV power (sum)Plant_Total_PV_Power float32 2 W 1 R Holding (FC03)
1553 1553 Plant total inverter AC active power (sum)Plant_Total_Inverter_AC_Active_Power float32 2 W 1 R Holding (FC03)
1555 1555 Plant total external produced power (sum)Plant_Total_External_Produced_Power · The table prints the unit as Wh for a power-named register. float32 2 Wh 1 R Holding (FC03)
1557 1557 Min. limit of plant SoCPlant_Min_SoC_Limit · Plant control needs software version 3.07.00 or greater; commands go to the MDC host inverter only. float32 2 % 1 RW Holding (FC03)
1559 1559 Max. limit of plant SoCPlant_Max_SoC_Limit · Plant control needs software version 3.07.00 or greater; commands go to the MDC host inverter only. float32 2 % 1 RW Holding (FC03)
1561 1561 Battery charge/discharge DC power setpointPlant_Battery_DC_Power_Setpoint · Plant control needs software version 3.07.00 or greater; commands go to the MDC host inverter only. float32 2 W 1 RW Holding (FC03)
1563 1563 Battery work capacity sum of all present batteriesPlant_Battery_Work_Capacity_Sum float32 2 Wh 1 R Holding (FC03)
1565 1565 Overall usable battery maximum usable DC-charge powerPlant_Max_Usable_DC_Charge_Power float32 2 W 1 R Holding (FC03)
1567 1567 Overall usable battery maximum usable DC-discharge powerPlant_Max_Usable_DC_Discharge_Power float32 2 W 1 R Holding (FC03)
1569 1569 Maximum battery DC-charge powerPlant_Max_Battery_DC_Charge_Power · Plant control needs software version 3.07.00 or greater; commands go to the MDC host inverter only. float32 2 W 1 RW Holding (FC03)
1571 1571 Maximum battery DC-discharge powerPlant_Max_Battery_DC_Discharge_Power · Plant control needs software version 3.07.00 or greater; commands go to the MDC host inverter only. float32 2 W 1 RW Holding (FC03)
1573 1573 Battery control timeout until fallbackPlant_Battery_Control_Timeout · Default value is 30 s. Plant control needs software version 3.07.00 or greater. uint32 2 s 1 RW Holding (FC03)
40346 40346 Total real energy exportedTotal_Real_Energy_Exported · Valid from PLENTICORE G2 SW 02.12.xxxxx, PLENTICORE G3 SW 3.04.01.xxxxx, PLENTICORE MP G3 SW 3.05.00.xxxxx (note 9). uint32 2 Wh 1 R Holding (FC03)
40354 40354 Total real energy importedTotal_Real_Energy_Imported · Valid from PLENTICORE G2 SW 02.12.xxxxx, PLENTICORE G3 SW 3.04.01.xxxxx, PLENTICORE MP G3 SW 3.05.00.xxxxx (note 9). uint32 2 Wh 1 R Holding (FC03)
40428 40428 Actual state of health (SoH)Battery_State_Of_Health · Only available if the connected battery system provides this value (note 10). The manual prints this address as 0x9DEC (40428). uint16 1 % 1 R Holding (FC03)

Scale is the number to multiply the raw value by to get the unit. Types with more than one register (32 and 64-bit) follow the word order above.

Open in Modbus Poll

  1. Download the Modbus Poll blocks file.
  2. Open Modbus Poll, connect to the device and set its unit ID. In Modbus Poll set Word order to CD AB.
  3. In the blocks panel on the right, click Import CSV and pick the file. CSV import is a Pro feature. Without Pro, Modbus Poll polls the first 20 values of your blocks.
  4. The wire addresses are already in the file, so there is no 0-based or 1-based conversion to do.

Once the values look right, export the tag list to Ignition, Kepware, Node-RED, Home Assistant or Voltrus SCADA.

Source and accuracy

Manufacturer document: KOSTAL Interface description MODBUS (TCP) & SunSpec with control information, PIKO IQ/PLENTICORE (www.kostal-solar-electric.com)

Revision version 2.9, release date 17.07.2026 (document DOC02308910-0020), hosted by KOSTAL. Valid from PIKO/PLENTICORE G1 UI 01.30.12092, PLENTICORE G2 SW 02.15.xxxxx, PLENTICORE G3 and MP G3 SW 3.07.00.xxxxx, p. 6-10, 18-30. Read on 2026-10-24.

Addresses, types, units and scale are taken from the document above. Names and descriptions are written by Voltrus. Firmware versions can differ, so confirm a value on your own device before you rely on it.

Found a mistake? Report it by email with the register address and the manual page.

Other solar inverters

All register maps · Modbus addressing explained