The 50A CT sensors will work without using the 200A CT sensors. The 200A CT sensors are only required if you're looking for system totals as captured from the main lines. If you are only concerned about the branch circuit usage from the panel, feel free to omit the 200A sensors.
Feedback and Suggestions
This knowledge base is pretty new for the Emporia team. Our goal is to provide all of the information we can to help you manage your energy in better ways. If this article wasn't helpful, or we could be more clarifying on any points please reach out to the Customer Support team and we'll certainly work to improve these guides.