It's unsafe to expose to internet. Because if you can see the temperature and other sensors you can also access Domoticz from the internet. And then you can change a lot of things and gain access to the host.

Is there a reason why a text device doesn't show the log command?

Never mind... just found a bug (#17) on github

Just found this thread after my Zeversolar Inverter is installed.

The webpage of the inverter uses a refresh to update the data it displays. It calls home.cgi to retrieve this data.
The content is a small text file which contains the data. On line 12 is the E_Today(KWh).