22
900-00272-01-001 Rev A
Figure 16 Skybox Block Diagram with External CTs
In Figure 16, when the SkyBox minimizes utility power coming into the system, it minimizes the power coming
into the house, rather than just the SkyBox itself. Because
A
is now located at the main grid input, the SkyBox
knows how much power is coming into the whole home. It can supply battery power through the grid port to
the unprotected loads (
B
) without sending that power to the utility. Some installers may call this ‘selling the
battery’, but no power is actually being sold or going to the utility in any way.
Using the CT location measurement, the grid port measurement, and the load port measurement (located
at
C
), the SkyBox determines a
Total Combined Load
value. This value is displayed on the
L O A D
tile.
If you tap on this tile, the SkyBox shows you the values broken into unprotected and protected loads.
Protected loads are measured at
C
. In general, whatever is not measured going out of the load port is
considered an unprotected load.
A
B
C
