Hi Kazim,
The demand shown in the ES-E report of the output (*.sim) file is the peak demand of that particular month. This does not necessarily correspond to the DEER Peak demand. In order to get the DEER Peak demand, it would be best to create an hourly report on your electric meter. The input file should look something like this:
$ ---------------------------------------------------------
$ Hourly Reporting
$ ---------------------------------------------------------
"DEER Peak Block" = REPORT-BLOCK
VARIABLE-TYPE = "EM1"
VARIABLE-LIST = ( 1 )
..
"DEER Peak HR" = HOURLY-REPORT
REPORT-SCHEDULE = "DEER Peak Year Sch"
REPORT-BLOCK = ( "DEER Peak Block" )
..
You can define your schedule to look at only the DEER Peak hours.
Good luck!
Warren Seto, P.E.