Upgrading a Leviton Load Center to include 2nd Gen Smart Circuit Breakers with Remote Control can be accomplished one circuit at a time or all breakers all at once. Installation is flexible and mixing Smart and non-Smart in the same panel is part of the design. Just install the Leviton Whole Home Energy Monitor (LWHEM) on a dedicated non-Smart double pole breaker. This should be done by a licensed electrician. To transition a Leviton Load Center to Smart does not require a change to the enclosure. Once the LWHEM is installed, configuration occurs using the free My Leviton app which is available in the Google Play or Apple Store. The pairing process is quick and easy.