Like the A6 but more 0-10V outputs

[admin]

1. if you want multi 0-10v output, you can chose KC868-AP or KC868-D16 , all are 16 channel dimmer controller. KC868-D16 is 16CH 0-10v output board.
2. Yes, now we don't have board with SSR. Do you want SSR use DC control DC load? or DC control AC load?
3. if you want extend by i2c bus. you can chose any i2c module, just software firmware supported, if you use home assistant, just check whether support by ESPHome.