docs: identify the Deye hybrid inverter

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

docs/spec.md

@@ -28,7 +28,7 @@ Grafana stays the tool for long-term analysis; the app shows up to 7 days of his
 | Raspberry Pi (`raspberrypi`) | Krosno LAN, `192.168.0.158` | Runs the backend (`home-pump.service`), WireGuard `10.0.0.2` |
 | House energy meter SDM630 | via RS485 gateway USR-TCP232 `192.168.0.10:502` | Whole house, 3 phases; read every 60 s by `rpi-measurements` on the Pi into Influx `electricity`/`PRAD2` |
 | PV inverter Fronius Symo 3.7-3-M | `192.168.0.143` (also `.155`) | 4.2 kWp; open local Solar API (JSON, read-only) |
-| Second PV inverter, likely with the battery | probably `192.168.0.232` (Solarman-type Wi-Fi logger, port 8899) | Model unknown; produces most of the energy |
+| Hybrid inverter Deye SUN-10K-SG04LP3-EU (SN 2408266176) | Wi-Fi logger probably `192.168.0.232` (Solarman, port 8899) | 10 kW, 3 phases, 48 V battery bank; produces most of the energy; installed by my father |
 | Solar-Log | `192.168.0.210` | Old monitoring, no data since April 2026 |
 | My server | remote | Traefik, InfluxDB 1.x (`Dom_Pompa`), Grafana, Gitea |