IQ Load Controller Additional Info

Load and Solar Circuit Control using IQ System Controller Auxiliary Contacts

Note: The IQ Load Controller can also be used for shedding 4 loads running at 120Vac. If being used for

such a use case it is important to ensure that the individual loads are connected on the outer poles of the

contactors. Whenever possible, try to balance the current on the 2 poles of a contactor. To do this,

connect the 2 loads with similar current requirements on the same contactor. This will prevent unequal

wearing of the 2 poles of the contactors, thus ensuring a longer service life for the contactor.

Note: If there is a multi-wire branch circuit where 2 single phase circuits share a neutral, both current

carrying conductors should be switched by a single contactor

Using the IQ Load Controller for PV shedding

The IQ Load Controller can be used for PV shedding as well. Note that this use case is only applicable for

installations on sites with IQ6/IQ7 or M215, M250 microinverters. IQ8 installations do not require PV

shedding.

The IQ6, IQ7 and M215, M250 PV installations with an IQ Battery require to maintain a Solar-To-Storage

ratio when off-grid. By using an IQ Load Controller, you can install an additional 2 PV branches on a site,

that function normally in an on-grid scenario but are shed when the system goes off-grid, thus preserving

the Solar-To-Storage ratio. You can install up to 2 IQ Load Controllers on a site, thus having the provision

to install up to 4 extra PV branch circuits for use in on-grid only mode.

Figure 3: PV Shedding systems