Hi Wilson,

Yes, of course. You just need to add a RVI section in the RVX file to reference to RVI file you want to use, like here:

{
    "rvis" : [ 
        { 
            "fileName" : "your.rvi",
            "tableName" : "ElecDemand",
            "frequency" : "Annual",
            "usedInCalc" : true
        }
    ],
    "csvs" : [
        {...
        }
    ]
}

Full details on how to use the RVX file is here: http://www.jeplus.org/wiki/doku.php?id=docs:manual_1_6_rvx

Cheers,

Yi