Register Map
SunSpec Device Register Address Reference -V2
Complete register map for the V2 C-Battery SunSpec interface, derived from a live device report.
Device Details (at report generation):
| Property | Value |
|---|---|
| Unit ID | 101 |
| Models Found | 1, 701, 702, 704, 713, 714, 715, 802 |
Quick Reference
Most commonly used registers at a glance:
| Register | Name | Description | Model | Access |
|---|---|---|---|---|
40074 |
InvSt | Inverter state | 701 | R |
40080 |
W | AC Power (W) | 701 | R |
40087–40088 |
Hz | AC Frequency (Hz) | 701 | R |
40115 / 40138 / 40161 |
AL1–3 | Phase currents L1/L2/L3 | 701 | R |
40116 / 40139 / 40162 |
VLxLy | Phase voltages L1-L2/L2-L3/L3-L1 | 701 | R |
40227 |
WMaxRtg | Rated max power (W) | 702 | R |
40299 |
WSetEna | Power setpoint enable | 704 | RW |
40300 |
WSetMod | Power setpoint mode | 704 | RW |
40301–40302 |
WSet | Power setpoint (W) | 704 | RW |
40348 |
SoC | State of Charge (%) | 713 | R |
40349 |
SoH | State of Health (%) | 713 | R |
40358 |
DCA | DC Current (A) | 714 | R |
40359 |
DCW | DC Power (W) | 714 | R |
40411 |
WChaRteMax | Max charge power (W) | 802 | R |
40412 |
WDisChaRteMax | Max discharge power (W) | 802 | R |
40441 |
V | Battery bus voltage (V) | 802 | R |
40444 |
CellVMax | Highest cell voltage (V) | 802 | R |
40447 |
CellVMin | Lowest cell voltage (V) | 802 | R |
40457 |
SetOp | Operational command | 802 | RW |
40458 |
SetInvState | Inverter state command | 802 | RW |
Model 1 -Common (Base: 40002)
8 implemented / 1 not implemented
| Address | Name | Type | Value / Notes |
|---|---|---|---|
40002 |
ID | uint16 | 1 |
40003 |
L | uint16 | 66 |
40004–40019 |
Mn | string | “C-Battery” |
40020–40035 |
Md | string | “Cbat-IQ” |
40044–40051 |
Vr | string | “1.0.0” |
40052–40067 |
SN | string | - |
40068 |
DA | uint16 | Modbus device address |
40069 |
Pad | pad | 0 |
Model 701 -DER AC Measurement (Base: 40070)
31 implemented / 41 not implemented
| Address | Name | Type | Scale | Value / Notes |
|---|---|---|---|---|
40070 |
ID | uint16 | 701 | |
40071 |
L | uint16 | 153 | |
40072 |
ACType | enum16 | AC wiring type | |
40073 |
St | enum16 | Operating state | |
40074 |
InvSt | enum16 | Inverter state (0=Off .. 7=Standby) | |
40075 |
ConnSt | enum16 | Connection status | |
40076–40077 |
Alrm | bitfield32 | Active alarms | |
40078–40079 |
DERMode | bitfield32 | Active DER control mode | |
40080 |
W | int16 | W_SF (2) | AC Power (W) |
40081 |
VA | int16 | VA_SF (2) | Apparent power (VA) |
40082 |
Var | int16 | Var_SF (2) | Reactive power (var) |
40083 |
PF | int16 | PF_SF (-3) | Power factor |
40084 |
A | int16 | A_SF (-1) | Total AC current (A) |
40085 |
LLV | uint16 | V_SF (-1) | Average line-line voltage (V) |
40087–40088 |
Hz | uint32 | Hz_SF (-3) | Frequency (Hz) |
40115 |
AL1 | int16 | A_SF (-1) | L1 current (A) |
40116 |
VL1L2 | uint16 | V_SF (-1) | L1-L2 voltage (V) |
40117 |
VL1 | uint16 | V_SF (-1) | L1-N voltage (V) |
40138 |
AL2 | int16 | A_SF (-1) | L2 current (A) |
40139 |
VL2L3 | uint16 | V_SF (-1) | L2-L3 voltage (V) |
40140 |
VL2 | uint16 | V_SF (-1) | L2-N voltage (V) |
40161 |
AL3 | int16 | A_SF (-1) | L3 current (A) |
40162 |
VL3L1 | uint16 | V_SF (-1) | L3-L1 voltage (V) |
40163 |
VL3 | uint16 | V_SF (-1) | L3-N voltage (V) |
40183 |
A_SF | sunssf | -1 | |
40184 |
V_SF | sunssf | -1 | |
40185 |
Hz_SF | sunssf | -3 | |
40186 |
W_SF | sunssf | 2 | |
40187 |
PF_SF | sunssf | -3 | |
40188 |
VA_SF | sunssf | 2 | |
40189 |
Var_SF | sunssf | 2 |
Model 702 -DER Nameplate (Base: 40225)
4 implemented / 47 not implemented
| Address | Name | Type | Scale | Value / Notes |
|---|---|---|---|---|
40225 |
ID | uint16 | 702 | |
40226 |
L | uint16 | 50 | |
40227 |
WMaxRtg | uint16 | W_SF (2) | Max rated active power (W) |
40270 |
W_SF | sunssf | 2 |
Model 704 -DER AC Controls (Base: 40277)
6 implemented / 39 not implemented
| Address | Name | Type | Scale | Access | Value / Notes |
|---|---|---|---|---|---|
40277 |
ID | uint16 | R | 704 | |
40278 |
L | uint16 | R | 65 | |
40299 |
WSetEna | enum16 | RW | 0=Disabled, 1=Enabled | |
40300 |
WSetMod | enum16 | RW | 1=Constant power (only supported mode) | |
40301–40302 |
WSet | int32 | WSet_SF (2) | RW | Power setpoint (W) |
40332 |
WSet_SF | sunssf | R | 2 |
Important
WSetEna enables/disables the active power setpoint. It is not a system on/off switch. Use Model 802 SetOp / SetInvState for operational control. See the protocol documentation.
Model 713 -Storage Monitoring (Base: 40344)
9 implemented / 0 not implemented
| Address | Name | Type | Scale | Value / Notes |
|---|---|---|---|---|
40344 |
ID | uint16 | 713 | |
40345 |
L | uint16 | 7 | |
40346 |
WHRtg | uint16 | WH_SF (2) | Energy rating (Wh) |
40347 |
WHAvail | uint16 | WH_SF (2) | Available energy (Wh) |
40348 |
SoC | uint16 | Pct_SF (-1) | State of charge (%) |
40349 |
SoH | uint16 | Pct_SF (-1) | State of health (%) |
40350 |
Sta | enum16 | Storage status | |
40351 |
WH_SF | sunssf | 2 | |
40352 |
Pct_SF | sunssf | -1 |
Model 714 -DC Measurement (Base: 40353)
8 implemented / 5 not implemented
| Address | Name | Type | Scale | Value / Notes |
|---|---|---|---|---|
40353 |
ID | uint16 | 714 | |
40354 |
L | uint16 | 43 | |
40357 |
NPrt | uint16 | Number of DC ports (1) | |
40358 |
DCA | int16 | DCA_SF (-1) | DC current (A) |
40359 |
DCW | int16 | DCW_SF (2) | DC power (W) |
40368 |
DCA_SF | sunssf | -1 | |
40369 |
DCV_SF | sunssf | -1 | |
40370 |
DCW_SF | sunssf | 2 |
Model 715 -DER Control (Base: 40398)
4 implemented / 3 not implemented
Note
Model 715 is present but OpCtl is not used for operational control. Operational control is handled through Model 802.
| Address | Name | Type | Access | Value / Notes |
|---|---|---|---|---|
40398 |
ID | uint16 | R | 715 |
40399 |
L | uint16 | R | 7 |
40405 |
AlarmReset | uint16 | RW | Write 1 to reset alarms |
40406 |
OpCtl | enum16 | RW | Not used |
Model 802 -Battery Base (Base: 40407)
33 implemented / 25 not implemented
Ratings and Capacity
| Address | Name | Type | Scale | Value / Notes |
|---|---|---|---|---|
40407 |
ID | uint16 | 802 | |
40408 |
L | uint16 | 62 | |
40409 |
AHRtg | uint16 | AHRtg_SF (1) | Amp-hour rating (Ah) |
40410 |
WHRtg | uint16 | WHRtg_SF (2) | Energy rating (Wh) |
40411 |
WChaRteMax | uint16 | WChaDisChaMax_SF (2) | Max charge power (W) |
40412 |
WDisChaRteMax | uint16 | WChaDisChaMax_SF (2) | Max discharge power (W) |
State and Measurements
| Address | Name | Type | Scale | Value / Notes |
|---|---|---|---|---|
40418 |
SoC | uint16 | SoC_SF (0) | State of charge (%) |
40428 |
Typ | enum16 | Battery chemistry (4=Li-Ion) | |
40429 |
State | enum16 | 1=Disconnected, 2=Initializing, 3=Connected, 4=Absorb, 5=Float, 6=Discharging | |
40441 |
V | uint16 | V_SF (-1) | Battery bus voltage (V) |
40444 |
CellVMax | uint16 | CellV_SF (-2) | Highest cell voltage (V) |
40447 |
CellVMin | uint16 | CellV_SF (-2) | Lowest cell voltage (V) |
40451 |
A | int16 | A_SF (-1) | Battery current (A) |
40452 |
AChaMax | uint16 | AMax_SF (-1) | Max charge current -dynamic (A) |
40453 |
ADisChaMax | uint16 | AMax_SF (-1) | Max discharge current -dynamic (A) |
40454 |
W | int16 | W_SF (0) | Battery power (W) |
Events
| Address | Name | Type | Value / Notes |
|---|---|---|---|
40433–40434 |
Evt1 | bitfield32 | SunSpec battery events |
40435–40436 |
Evt2 | bitfield32 | SunSpec battery events (extended) |
40437–40438 |
EvtVnd1 | bitfield32 | Vendor-specific events |
40439–40440 |
EvtVnd2 | bitfield32 | Vendor-specific events (extended) |
Control Registers
| Address | Name | Type | Access | Value / Notes |
|---|---|---|---|---|
40424 |
LocRemCtl | enum16 | RW | 0=Remote, 1=Local |
40427 |
AlmRst | uint16 | RW | Write 1 to reset alarms |
40457 |
SetOp | enum16 | RW | 1=Connect, 2=Disconnect |
40458 |
SetInvState | enum16 | RW | 1=Stopped, 2=Standby, 3=Started |
Scale Factors
| Address | Name | Value |
|---|---|---|
40459 |
AHRtg_SF | 1 |
40460 |
WHRtg_SF | 2 |
40461 |
WChaDisChaMax_SF | 2 |
40463 |
SoC_SF | 0 |
40466 |
V_SF | -1 |
40467 |
CellV_SF | -2 |
40468 |
A_SF | -1 |
40469 |
AMax_SF | -1 |
40470 |
W_SF | 0 |