research: verified Deye register map via the Solarman logger

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01U8EHjVrf5ffw1Vjn5bPGJu

research/energy/README.md

@@ -4,5 +4,29 @@
 |---|---|
 | `deye-nameplate.jpg` | Nameplate of the hybrid inverter Deye SUN-10K-SG04LP3-EU, SN 2408266176 (photo 2026-10-23) |
 
-The inverter is read through its Solarman Wi-Fi logger (local protocol on port 8899), which
-needs the **logger's** serial number (sticker on the Wi-Fi stick), not the inverter's.
+## Deye hybrid inverter, read locally
+
+Solarman Wi-Fi logger at `192.168.0.232:8899`, logger SN **3112107147** (sticker on the stick;
+the `PWD` on the sticker is the stick's own Wi-Fi hotspot password and is not needed).
+Protocol: Solarman V5 wrapping Modbus RTU, slave id 1, FC3 read only (`pysolarmanv5`).
+
+Registers verified 2026-10-23 22:26 (serial 3–7 matched the nameplate, grid power matched the
+SDM630 house meter: 645 W vs 640 W):
+
+| Register | Meaning | Scale | Value at check |
+|---|---|---|---|
+| 3–7 | inverter serial, ASCII | – | 2408266176 |
+| 586 | battery temperature | (x − 1000) / 10 °C | 19.2 |
+| 587 | battery voltage | /100 V | 56.49 |
+| 588 | battery SOC | % | 99 |
+| 590 | battery power, + discharge / − charge | W, signed | −24 |
+| 598–600 | grid voltage L1–L3 | /10 V | 233.9 / 233.4 / 231.9 |
+| 622–624, 625 | grid power per phase, total; + import / − export | W, signed | 390 / 52 / 203, 645 |
+| 650–653 | load power per phase, total | W | 364 / 26 / 180, 570 |
+| 672, 673 | PV1, PV2 power | W | 0, 0 (night) |
+| 514, 515 | today battery charge, discharge | /10 kWh | 0.5, 0.1 |
+| 520, 521 | today grid bought, sold | /10 kWh | 16.8, 22.3 |
+| 526 | today load | /10 kWh | 24.2 |
+| 529 | today PV production | /10 kWh | 29.9 |
+
+Fronius Symo 3.7 (`192.168.0.143`, Solar API JSON) produced another 4.4 kWh that day.