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VPP Protocol

Source documents: Growatt VPP Communication Protocol of Inverter V2.01 / V2.03 (GI-BK-E060_GROWATT.VPP.COMMUNICATION.PROTOCOL.OF.INVERTER_V2.03.xlsx, growatt_vpp_protocol_v2.01_registers.csv)

VPP (Virtual Power Plant) is Growatt's advanced monitoring and control protocol. It uses registers in the 30000+ range and is only supported by newer inverter models. Multiple protocol versions (V2.01, V2.02, V2.03) are in active use - all share the same core register layout described here.

Applicable models: SPH, SPA, MIN TL-XH, MOD TL3-XH, MID TL3-XH, WIT, WIS, and others


Register Ranges

Range Purpose
30000-30099 Device identification, rated parameters, system settings
30100-30499 Control registers (AC power, battery, TOU schedule)
31000-31499 Real-time data (status, PV, grid, battery, load)
32000+ Extended / model-specific

DTC Codes (Table 3-1)

The DTC (Device Type Code) is stored at holding register 30000 and uniquely identifies the inverter model. The integration reads this at startup for automatic model detection.

DTC Code Model
3502 SPH 3000-6000TL BL
3503 SPH 3000-6000TL HU
3504 SPH 3000-6000TL HUB
3601 SPH 4000-10000TL3 BH-UP
3701 SPA 1000-3000TL BL
3715 SPA 3000-6000TL AU
3716 SPA 3000-6000TL AUB
3725 SPA 4000-10000TL3 BH-UP
3735 SPA 3000-6000TL BL
5001 MID 17–25KTL3-X / MID 20–30KTL3-X2
5002 MID 33–36KTL3-X(Pro.E) / MOD 3–15KTL3-X
5003 MAC 30–70KTL3-X
5100 MIN 2500-6000TL-XH/XH(P)
5200 MIC/MIN 2500-6000TL-X/X2
5201 MIN 7000-10000TL-X/X2
5400 MOD-XH / MID-XH
5600 WIS 100K-AM / WIT 50–100K-H/HE/HU
5601 WIT 100KTL3-H
5800 WIS 215KTL3
5801 WIS 215K-AM

Holding Registers (93 registers)

Address Parameter Name R/W Type Unit Count Notes
30000 Equipment type (DTC) RO UINT16 - 1 See Table 3-1
30001 SN RO UINT16 - 15 -
30016 Rated power (Pn) RO UINT32 0.1W 2 -
30018 Maximum active power (Pmax) RO UINT32 0.1W 2 -
30020 Maximum reactive power (Qmax fed into the grid) RO UINT32 0.1VAR 2 -
30022 Maximum reactive power (Qmax absorption grid) RO UINT32 0.1VAR 2 -
30024 Maximum apparent power (Smax) RO UINT32 0.1VA 2 -
30026 Rated charging and discharging power of BDC RO UINT32 0.1W 2 -
30028 PV input maximum power RO UINT32 0.1W 2 -
30030 Battery type RO UINT8 - 1 0: lead acid battery, 1: lithium battery
30031 Reserve RO UINT16 - 29 -
30060 Machine Model RO UINT16 ASCII 1 Example: TL
30061 Machine Model RO UINT16 ASCII 1 Example: AA
30062 Version Num 1 RO UINT16 Digit 1 -
30063 Version Num 2 RO UINT16 Digit 1 -
30064 Version Num 3 RO UINT16 Digit 1 -
30065 M3 Version Name RO UINT16 ASCII 1 Example: ZB
30066 M3 Version Name RO UINT16 ASCII 1 Example: AA
30067 Version Num 1 RO UINT16 Digit 1 -
30068 Machine Model RO UINT16 ASCII 1 Example: VC
30069 Machine Model RO UINT16 ASCII 1 Example: AA
30070 Version Num 1 RO UINT16 Digit 1 -
30071 DSP2 Software Version Name RO UINT16 ASCII 1 Example: VC
30072 DSP2 Software Version Name RO UINT16 ASCII 1 Example: BA
30073 Version Num 1 RO UINT16 Digit 1 -
30074 BCU Software Version Name RO UINT16 ASCII 1 Example: QB
30075 BCU Software Version Name RO UINT16 ASCII 1 Example: AA
30076 Version Num 1 RO UINT16 Digit 1 -
30077 M3 Software Version Name RO UINT16 ASCII 1 Example: ZE
30078 M3 Software Version Name RO UINT16 ASCII 1 Example: BA
30079 Version Num 1 RO UINT16 Digit 1 -
30080 Machine Model RO UINT16 ASCII 1 Example: ZO
30081 Machine Model RO UINT16 ASCII 1 Example: AA
30082 Version Num 1 RO UINT16 1 1 -
30083 Reserved RO UINT16 - 1 Reserved
30084 Reserved RO UINT16 - 1 Reserved
30099 VPP Protocol Version RO UINT16 - 15 200 represents V2.00, 201 represents V2.01
30100 Control authority RW UINT16 - 1 0: not enabled, 1: Enable, Default: 0
30101 On off command RW UINT16 - 1 0: power off, 1: power on, 9: bypass (V2.03), Default: 1, Not storage
30102 Country / region number RO UINT16 - 1 See Table 3-5
30103 Reserve RW UINT16 - 1 -
30104 System time RW UINT16 - 6 See table 3-6
30110 Reserve RW UINT32 - 2 -
30112 Mailing address RO UINT16 - 1 [1, 255], Default: 1
30113 Communication baud rate RO UINT16 - 1 0:9600 bps, 1:38400 bps, Default: 0
30114 Reserved RW UINT16 - 1 -
30115 SYN enable RW UINT16 - 1 Offline box enable, 0: not enabled, 1: enable, Default: 0
30116 Reserve RW UINT16 - 34 -
30150 Reserve RW UINT16 - 1 -
30151 Active power percentage derating RW UINT16 % 1 Power limit percentage: [0,100], Default: 100
30152 Reserve RW UINT16 - 2 -
30154 Static active power limitation RW UINT16 % 1 Power limit percent: [0,100], Default: 100, Actual active power is the less one, Not storage
30155 EPS offline enable RW UINT16 - 1 0: not enabled, 1: enable, Default: 0
30156 EPS offline frequency RW UINT16 0.01Hz 1 0:50Hz, 1:60Hz, Default: 0
30157 EPS offline voltage RW UINT16 - 1 Default: 0 — WIT/WIS: 0:230V 1:208V 2:240V 3:220V 4:127V 5:277V 6:254V; MOD-XH/MID-XH/MOD/MID-HU: 0:230V 1:208V 2:240V 3:220V; SPH/SPA: 0:230V 1:208V 2:240V; other models: not used
30158 Reserve RW UINT16 - 2 -
30160 Fix Q RW UINT16 % 1 Power limit percentage: [0,70], Default: 60
30161 Reactive power mode RW UINT16 - 1 0: PF=1, 1: Pf value setting, 4: Lagging reactive power (+), 5: Leading reactive power (-), Default: 0
30162 Power factor RW UINT16 - 1 [0,2000] ∪ [18000,20000], Default: 20000, Actual PF = (set value - 10000) * 0.0001
30163 Reserve RW INT16 % 1 -
30164 Reserve (reactive power curve) RW UINT16 - 36 -
30200 Export Limitation Enable RW UINT16 - 1 0: not enabled, 1: single machine enable, Default: 0
30201 Export Limitation power Rate RW INT16 % 1 [-100,100], Default: 0, Positive=backflow, negative=fair current
30202 Export Limitation Failure power Rate RW UINT16 % 1 [0,100], Default: 0
30203 EMS Communicating Failure Time RW UINT16 S 1 [1,300], Default: 30
30204 EMS Communication Failure Enable RW UINT16 - 1 0: not enabled, 1: enable, Default: 0
30205 Super Export Limitation enable RW UINT16 - 1 0: not enabled, 1: enable, Default: 0
30206 Export Limitation change slope RW UINT16 *0.01%Pn/s 1 [1,20000], Default: 27
30207 Export Limitation single phase control enable RW UINT16 - 1 0: not enabled, 1: enable, Default: 0
30208 Export Limitation protection mode RW UINT16 - 1 0: Default mode, 1: Combine control, 2: software control, 3: hardware control, Default: 0
30209 Automatic on/off-grid switch enable (V2.03) RW UINT16 - 1 0: Automatic, 1: Manual, Default: 0
30210 On/off-grid set (V2.03) RW UINT16 - 1 0: on-grid, 1: off-grid, 2: diesel engine mode, Default: 0 — settable only when 30209=1 (Manual)
30211 Active power R (V2.03) RW UINT16 0.1kW 1 [0, rated power/3]
30212 Active power S (V2.03) RW UINT16 0.1kW 1 [0, rated power/3]
30213 Active power T (V2.03) RW UINT16 0.1kW 1 [0, rated power/3]
30214 Single phase active power control enable (V2.03) RW UINT16 - 1 0: not enabled, 1: enable, Default: 0
30215 AC charge power max limitation (V2.03) RW UINT16 0.1kW 1 [0, rated power], Default: no limit — active only when 30410 is enabled
30216 Reserve RW UINT16 - 34 -
30250 Diesel engine rated power (V2.03) RW UINT16 0.1kW 1 [0,10000], Default: inverter rated power
30251 Diesel engine charge power (V2.03) RW UINT16 0.1kW 1 [0,10000], Default: inverter rated power
30252 Diesel engine enable (V2.03) RW BOOL - 1 0: not enabled, 1: enable, Default: 0
30253 Off-grid diesel engine start SOC (V2.03) RW UINT16 % 1 [0,100], Default: 20
30254 Off-grid diesel engine stop SOC (V2.03) RW UINT16 % 1 [0,100], Default: 50
30255 Diesel engine preheat time (V2.03) RW UINT16 s 1 [0,3600], Default: 60
30256 Reserve RW UINT16 - 44 -
30300 Battery cluster index RW UINT16 - 1 [0,3], Default: 0
30301 Demand management enable (V2.03) RW UINT16 - 1 0: not enabled, 1: enable, Default: 0
30302 Demand management export power limitation (V2.03) RW UINT16 0.1kW 1 [0, rated power], Default: no limit
30303 Demand management import power limitation (V2.03) RW UINT16 0.1kW 1 [0, rated power], Default: no limit
30304 Peak-shaving backup power SOC (V2.03) RW UINT16 % 1 [0,100], Default: 50
30305 Peak-shaving enable (V2.03) RW UINT16 - 1 0: not enabled, 1: enable, Default: 0
30306 Reserve RW UINT16 - 94 -
30400 Reserve (Battery max charging power) RW UINT32 0.1W 2 Not used
30402 Reserve (Battery max discharging power) RW UINT32 0.1W 2 Not used
30404 Charging cut off SOC RW UINT8 % 1 [10,100], Default: 100
30405 Online discharge cut off SOC RW UINT8 % 1 [10,100], Default: 10
30406 Load priority discharge cut off SOC RW UINT8 % 1 [10,100], Default: 10
30407 Remote power control enable RW UINT8 - 1 0: not enabled, 1: Enable, Default: 0, Not storage
30408 Remote power control charging time RW UINT16 min 1 0: unlimited, 1~1440min, Default: 0, Not storage
30409 Remote charge and discharge power RW INT16 - 1 [-100,100], Positive=charging, Negative=discharge, Default: 0, Not storage
30410 AC charging enable RW UINT8 - 1 0: not enabled, 1: Enable AC charge (PV charging first), 2: Enable AC charge (AC charging first) (V2.03), Default: 0
30411 Charging and discharging in different periods (20 sections) RW UINT16 - 61 See Table 3-2, 30412~30471 default: 0
30472 Reserve RO UINT16 - 2 -
30474 Actual control value of charging and discharging power RO UINT16 - 1 [-100,100], Positive=charging, Negative=discharge
30475 Offline discharge cut off SOC RW UINT16 % 1 [10,100], Default: 10
30476 TOU default mode (V2.03) RW UINT8 - 1 Mode outside configured TOU periods: 0: load first, 1: battery first, 2: grid first, Default: 0
30477 TOU reset enable (V2.03) RW UINT8 - 1 [0,1] — when enabled, all existing TOU period data is cleared on next period write, Default: 0
30478 Reserve RW UINT16 - 18 -
30496 Battery charge stop voltage RW UINT16 0.1V 1 Lead-acid only, [0,15000]
30497 Battery discharge stop voltage RW UINT16 0.1V 1 Lead-acid only, [0,15000]
30498 Battery max charge current RW UINT16 0.1A 1 Lead-acid only, [0,2000], Default: 1500
30499 Battery max discharge current RW UINT16 0.1A 1 Lead-acid only, [0,2000], Default: 1500
30500 Safety Information RW UINT16 - 500 See GROWATT INVERTER VPP COMMUNICATION PROTOCOL & SAFETY PARAMETERS
32000 Reserve RW UINT16 - 100 -

Input Registers (87 registers)

Address Parameter Name R/W Type Unit Count Notes
31000 Working state of inverter RO UINT16 1 1 0:standby, 1:self-test, 2:reserved, 3:fault, 4:upgrade, 5:PV online & battery offline & on-grid, 6:PV online (or offline) & battery online & on-grid, 7:PV online & battery online & off-grid, 8:PV offline & battery online & off-grid, 9:bypass
31001 Battery working status RO UINT16 1 1 0:standby,1:disconnected,2:charging,3:discharge,4:fault,5:upgrade
31002 Priority of work RO UINT16 1 1 0:load first,1:Battery first,2:grid first
31003 Reserve RO UINT16 - 2 -
31005 Fault code RO UINT16 - 1 See Table 3-3
31006 Fault sub code RO UINT16 - 1 See Table 3-3
31007 Alarm code RO UINT16 - 1 See Table 3-4
31008 Alarm sub code RO UINT16 - 1 See Table 3-4
31009 Reserve RO UINT16 - 1 -
31010 PV1 voltage RO INT16 0.1V 1 -
31011 PV1 current RO INT16 0.1A 1 -
31012 PV2 voltage RO INT16 0.1V 1 -
31013 PV2 current RO INT16 0.1A 1 -
31014 PV3 voltage RO INT32 0.1W 1 -
31015 PV3 current RO INT16 0.1A 1 -
31016 PV4 voltage RO INT16 0.1V 1 -
31017 PV4 current RO INT16 0.1A 1 -
31018 PV5 voltage RO INT16 0.1V 1 -
31019 PV5 current RO INT16 0.1A 1 -
31020 PV6 voltage RO INT16 0.1V 1 -
31021 PV6 current RO INT16 0.1A 1 -
31022 PV7 voltage RO INT16 0.1V 1 -
31023 PV7 current RO INT16 0.1A 1 -
31024 PV8 voltage RO INT16 0.1V 1 -
31025 PV8 current RO INT16 0.1A 1 -
31026 PV9 voltage RO INT16 0.1V 1 -
31027 PV9 current RO INT16 0.1A 1 -
31028 PV10 voltage RO INT16 0.1V 1 -
31029 PV10 current RO INT16 0.1A 1 -
31030 PV11 voltage RO INT16 0.1V 1 -
31031 PV11 current RO INT16 0.1A 1 -
31032 PV12 voltage RO INT16 0.1V 1 -
31033 PV12 current RO INT16 0.1A 1 -
31034 PV13 voltage RO INT16 0.1V 1 -
31035 PV13 current RO INT16 0.1A 1 -
31036 PV14 voltage RO INT16 0.1V 1 -
31037 PV14 current RO INT16 0.1A 1 -
31038 PV15 voltage RO INT16 0.1V 1 -
31039 PV15 current RO INT16 0.1A 1 -
31040 PV16 voltage RO INT16 0.1V 1 -
31041 PV16 current RO INT16 0.1A 1 -
31042 Reserve RO INT16 - 16 -
31058 PV input power RO INT32 0.1W 2 -
31060 Reserve RO UINT32 - 40 -
31100 Active power RO INT32 0.1W 2 Positive:export to grid, Negative:import from grid — grid-tied MID models: this is inverter AC output only; use Meter Power (31112) for actual grid exchange
31102 Reactive power RO INT32 0.1VAR 2 -
31104 Reserve RO INT16 - 1 -
31105 Grid frequency RO UINT16 0.01Hz 1 -
31106 Grid voltage / line AB voltage RO UINT16 0.1V 1 When output mode is L/N
31107 BC line voltage of power grid RO UINT16 0.1V 1 -
31108 CA line voltage of power grid RO UINT16 0.1V 1 -
31109 Grid current / A phase current of grid RO INT16 0.1A 1 -
31110 Phase B current of grid RO INT16 0.1A 1 -
31111 Phase C current of grid RO INT16 0.1A 1 -
31112 Meter power RO INT32 0.1W 2 Positive:import from grid, Negative:export to grid
31114 Inverter temperature RO INT16 0.1℃ 1 [-400,1250]
31115 Reserve RO INT16 - 1 -
31116 Reserve RO INT16 - 1 -
31117 Reserve RO INT16 - 1 -
31118 Power to user daily RO UINT32 0.1KWH 2 -
31120 Total power to user RO UINT32 0.1KWH 2 -
31122 Power to grid daily RO UINT32 0.1KWH 2 -
31124 Total power to grid RO UINT32 0.1KWH 2 -
31126 Reserved RO INT16 - 74 -
31200 Charge/discharge power RO INT32 0.1W 2 Positive:charging, Negative:discharge
31202 Daily charge of battery RO UINT32 0.1KWH 2 -
31204 Cumulative charge of battery RO UINT32 0.1KWH 2 -
31206 Daily discharge capacity of battery RO UINT32 0.1KWH 2 -
31208 Cumulative discharge of battery RO UINT32 0.1KWH 2 -
31210 Maximum allowable charging power of battery RO UINT32 0.1W 2 -
31212 Maximum allowable discharge power of battery RO UINT32 0.1W 2 -
31214 Battery voltage RO INT16 0.1V 1 -
31215 Battery current RO INT32 0.1A 2 Positive:charging, Negative:discharge
31217 SOC RO UINT8 - 1 [0,100]
31218 SOH RO UINT8 - 1 [0,100]
31219 Battery capacity rating (FCC) RO UINT32 AH 2 -
31221 Reserved RO UINT32 AH 2 Reserved for Battery remaining capacity (RM)
31223 Battery environmental temperature RO INT16 0.1℃ 1 [-400,1250]
31224 Reserved RO INT16 0.1℃ 1 Reserved for Maximum battery temperature
31225 Cluster Sum RO UINT16 1 1 -
31226 Single Cluster Module Number RO UINT16 1 1 -
31227 Module Rated Voltage RO UINT16 0.1V 1 -
31228 Module Rated Cap RO UINT16 0.1AH 1 -
31229 Reserve RO UINT16 - 71 -
31300 Battery Information 2 RO - - 100 Refer to 31200~31299
31400 Battery Information 3 RO - - 100 Refer to 31200~31299
31500 Battery Information 4 RO - - 100 Refer to 31200~31299