I don't know. But I figured they know what they are talking about. There's a note on their some of their products that they don't work everywhere.
Emporia sells two primary products.
1) A monitor that you use in your own breaker panel to measure current happening in your house
2) A monitor that interacts wtih your power company's energy meter
I suspect your PoCo is telling you their tool won't work with their meter. But you should still be able to use the other product to monitor your home loads.