SolarCity H6 - 3.6 Whole-Home Backup at Main Panel

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Chapter 1 - Welcome

3.6 - Whole-Home Backup at the Main Panel

This section provides an overview of systems for manually switching between the grid and the

backup AC output of the SolarCity H6 inverter. A mechanical interlock kit (MIK) is placed on

the main panel to ensure that only one of two circuit breakers can be in the ON position at

the same time. In situations where a mechanical interlock kit cannot be used on the main

panel, a separate manual transfer switch (MTS) panel is installed, and the MIK is placed on the

MTS panel.

3.6.1 - Mechanical Interlock Kit on the Main Panel

When it is possible to install the mechanical interlock kit (MIK) directly on the main panel, the

SolarCity H6 inverter AC grid POI goes to the main panel. The H6 inverter back-up/

standalone AC output also goes to the main panel, on a separate, standalone breaker as

shown in

Figure 3-21

The MIK is installed directly on the main panel so the homeowner can manually switch either

the main breaker or the H6 inverter standalone breaker ON, but can never have both

breakers set to ON.

Figure 3-21: Mechanical Interlock Kit (MIK) Installed on a Main Panel

Note: When a panel with an MIK installed has the breaker for the H6

standalone output in the ON position, the H6 AC grid POI breaker should

be OFF. If it is not, a voltage ON-OFF situation may occur.

FIREMAN

SWITCH

(optional)

AC POI

AC Standalone

RSD RSD

BATTERY

PACK

Power

Communications

MAIN PANEL

35A

PV2B PV2A PV1B PV1A

35A

200A

SOLARCITY

INVERTER