I would like to know if the E4 will output SNMP data?

The Sensatronics E4 does support SNMP v1 and so can be used with a wide variety of SNMP servers like Nagios, MRTG and a host of others. I suspect that, from a setup perspective, it is much easier using Intellipool because a number of Sensatronics (and other environment monitors) plugins are available.