Data Visualization

eMon Energy is capable of storing ten years or more of high resolution data. An integrated web-server provides access to that data using a versatile query/graph application called Graph+ and also provides a RESTful data query facility capable of producing JSON or CSV formatted downloads.

You can also upload your data to our eMon Energy Monitor Service, InfluxDB, PVoutput or providing a variety of alternative ways to organize and view your voltage, power and energy use. The servers can be fast and accessible from any place where there is internet connectivity. But there are some circumstances under which you may prefer to access your data directly from the eMon Energy:

  • Internet connection is down.

  • You prefer the simplicity and power of the local graphic viewer.

  • You are not using eMon Monitor, Emoncms or influxDB to save your data.

  • You require finer resolution than is used in your Emoncms feeds.

  • You need to see data that is collected by eMon Energy but is not being uploaded to your cloud service.


This latest graphic viewer unlocks virtually all of the data in the datalog. You can graph all of the metrics associated with each input or output, including Volts, Watts, Wh, Amps, VA, PF and Hz.

There are selectable predefined time-periods like "Today", "Yesterday", "Last Week" and "Last Month", and a calendar interface that can be used to select custom date/time bounds. Data can be grouped by hour, day, week or month. The eMon Energy query recognizes week and month boundaries and daylight-time changes.