I want to be able to track solar parameters such as battery voltage, solar input voltage, current etc. While my original idea was to just design this myself with arduino I am wondering if there is a plug and play solution out there? I don't want anything that uses apps or cloud or any of that, but rather outputs data in a format that I can easily interface with it programmatically. Like a web page that just displays it and I can just scrape the data or something. Or even better if it's serial. Goal is to use it with arduino so I can turn relays on/off and do other things based on the information. (ex: turn off certain loads if voltage is too low)
Does such a device exist?