I used a custom integration to manage my LG water heater in the past. The new core LG Thinq integration seems good, but it lacks the current used power sensor (in watts), included in the custom integration that I used in the past. This is essential to properly manage the current energy usage in my home, to use the solar power at maximum.
Core integration without current power sensor → LG ThinQ - Home Assistant
Custom integration with current power sendor → GitHub - ollo69/ha-smartthinq-sensors: HomeAssistant custom integration for SmartThinQ LG devices