Deepbrook

RS-485/LAN/GSM relay module:
https://www.aliexpress.com/item/1005007465421050.html

Cheap relayboard:
https://www.aliexpress.com/item/1005008641310021.html

Vevor transformer, 220V -> 230V, more amps from Vokek to 10A line?
https://www.aliexpress.com/item/1005007899836504.html

10-80V to 5V 3A. This would be good to charge phone from any battery. Or if you want to be sure that voltage is right, maybe better to do 10-80V -> 12V and use separate cigarette usb adapter.
https://www.aliexpress.com/item/1005007181838501.html

Interesting non-existent link, page that is not there. I just check if your phone tracks this same way like it does track sms.
https://www.raatikainen.org/mammoth

New 3500W Inverter (24V)
https://www.youtube.com/watch?v=cUb7gZiHpHk