230 Vrms isn’t a new type of Energy or something , it’s simply an acronym or two
capital V is for Volts, the lowercase rms is root-mean-square (the effective heating effect of a sinewave)
so 230 Vrms is the voltage that you’ve been looking for (it has a higher peak voltage, but rms gives the same/equivalent as a DC (direct current) voltage at that level) it is in Volts....