EI Inverter (US) – Tigo Help Center

Tigo Battery Sizing Tool

The Tigo EI Battery (US) Sizing Tool is for grid-tied residential systems and is divided into two sections: Load Entry fields Load Analysis Click HERE to download the tool. Click HERE to watc... See more

Tigo String Sizing Tool

The Tigo Solar Sizing Tool is designed to help you determine the number of modules per string and how many strings the Tigo EI Inverter (US) will need to operate correctly. String sizing is a ne... See more

How to Connect Multiple EI Inverters to an E-Stop Rapid Shutdown Switch

One E-Stop switch can shut down multiple PV strings feeding multiple EI Inverters. To enable this, daisy-chain two 20 – 18 AWG wires to connect EI Inverter E-Stop switch terminals to the E-Stop swi... See more

Commissioning: Connecting EI Inverter to customer's Wi-Fi

The article explains how to connect the Tigo EI Inverter to the customer's Internet during the commissioning process. Prerequisites: The site must have a stable Internet connection. WiFi network ... See more

EI Inverter Error Code 203 - PV Isolation Low

Symptoms: The following error message is reported: Error Code 203 - PV Isolation Low. Cause: The inverter has detected a low resistance reading to ground. There is an issue with DC wiring or mo... See more

EI Inverter Error Code 201 - Residual Current High

Contents: Issue Possible Causes Troubleshooting Step 1. Completely de-energize system Step 2. Check inverter grounding conductor screw tightness Step 3. Check PV grounding conductor integrity. ... See more

Tigo EI Inverter - PV Array Ground Fault Troubleshooting

This article contains background information to supplement these articles: EI Inverter Error Code 200 - AFCI Fault EI Inverter Error Code 201 - Residual Current High EI Inverter Error Code 203 - PV... See more

EI Inverter Error Code 200 - AFCI Fault

Symptoms: The EI Inverter reports the following message: Error Code 200 - AFCI Fault. The EI Inverter LED Indicator shows a continuous red fault light accompanied by a loud buzzer. Cause: Th... See more