generating a "so far today" value

I'd like to monitor how much kWh my solar panels have produced so far today on emoncms.org.  I already have beautiful bar charts showing daily total kWh, but the kWh total for the day only shows up after the current day is over.  Is there a way I can generate a feed that shows up-to-the-minute accumulated kWh for the current day? The feed would have to reset to zero at the end of every day so it starts at zero for the next day.  I've tried the "Reset to ZERO" process but there are no parameters to set so I'm not sure how this process works.  Thanks for any ideas!