Tigo EI Inverter Manual

Installation manual for the Tigo EI Inverter, including instructions for the EI Battery, ATS, and Energy Meter

Photovoltaic Rapid Shutdown System Requirements

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The Tigo EI Inverter and TS4 module-level power electronics (MLPE) have been designed, evaluated, and certified as a Photovoltaic Rapid Shutdown System (PVRSS) complying with the 2017 and 2020 editions of the National Electric Code (NEC). All conductors both inside and outside the array boundary will contain reduced voltage, below 30VDC within 30 seconds.

Where rapid shutdown is required, all PV modules connected to an EI Inverter must be connected to a TS4-A-O or TS4-A-F to provide rapid shutdown functionality. Buildings with PV systems requiring rapid shutdown shall have permanent labels located at the service equipment to which the system is connected, or an approved readily available location. The label on the right is included in the inverter packaging.

Figure 1 Rapid Shutdown Label

The Rapid Shutdown Initiation Device is required to be labeled per NEC 690.56(C)(2). This label shall be on or within 3 feet of the initiation device and contain the words “RAPID SHUTDOWN SWITCH FOR SOLAR PV SYSTEM”. The label shall be reflective, written in all capitalized letters and have a minimum height of 9.5mm (3/8 in) in white on red background.