Modbus registers¶
Complete reference of the Modbus registers used by the integration for each battery version.
Full reference document
The complete modbus register table is available in registers.md.
Firmware versions¶
| Code | Model |
|---|---|
a |
Venus A |
d |
Venus D |
e_v12 |
Venus E v1/v2 |
e_v3 |
Venus E v3 |
Data types¶
| Type | Size | Description |
|---|---|---|
uint16 |
2 bytes | Unsigned 16-bit integer |
int16 |
2 bytes | Signed 16-bit integer |
uint32 |
4 bytes | Unsigned 32-bit integer |
int32 |
4 bytes | Signed 32-bit integer |
uint48 |
6 bytes | Unsigned 48-bit integer |
uint64 |
8 bytes | Unsigned 64-bit integer |
char |
variable | Text string |
bit |
— | Bit field / flags |
Key registers¶
| Register | Name | Description |
|---|---|---|
| 32104 | battery_soc |
State of charge (%) — Venus E v3 |
| 34002 | battery_soc |
State of charge (%) — Venus A/D/E v2 |
| 32102 | battery_power |
Battery power (W) — Venus E v3 |
| 30001 | battery_power |
Battery power (W) — Venus A/D/E v2 |
| 44000 | — | Charging cutoff (manipulated by weekly full charge) |