Regarding the timer settings, it would be nice though, if the timer start was in time/clock format rather than in minutes.
At the moment the parameter values are shown exactly as they are read from the control box, it would of course be possible to convert the value to a better representation (hours:minutes in this case) in special cases. Pretty easy to do, I added in 'issue' in github for it so I'll remember it when I have some time for pellmon.
Is it possible to have the hotwater temp in the graph on the frontpage as well.
Absolutely, you can add as many data lines as you like to the graph. Look into the sections [rrd_ds_names], [pollvalues] and [graphcolors] in the configuration file. Due to the way the rrd database I'm using works you need to either delete the old database and let pellmon create a new if you change the database definitions, or you can use the rather complicated method described in the pellmon wiki to add new datasets to an existing database.
Would You prefer any future comments in English or is Danish OK?
Any way you feel most comfortable with, I think I handle reading Danish quite well by now and English isn't my first language either.