If (IF) the OP got VS30 by Beijing EP Solar, then it has energy meter. Renogy is famous for being inconsistent.
But... It's been said many times, a controller equipped with energy meter will only measure total output of controller, and only when solar is actively charging. It won't measure energy consumed by devices when panel generates less than your total needs. Nor would it account for battery losses - you use 100 AH and need to put 120 AH back into battery.
AH meter on controller would work as a rough estimate of daily energy use, if you've been all day on solar only, no generator, and if you know where you are at the end of the day. Ex, if the battery is Full, like 99.9% full, i.e. charging stops. But then again, if solar can bring it to full every day, the goal is achieved and you don't really need to know daily energy use.