The EI Automatic Transfer Switch (ATS) – Wiring
EI Residential Solar Solution US Installation Manual | www.tigoenergy.com | Help Center 25
Conductors must be ferruled copper, 90°C rated, non-fine stranded:
• ATS AC to load/grid: 1/0 – 4/0 AWG
• ATS AC to inverter: 8 – 6 AWG
• ATS AC to generator starter battery charger (TSS-200A-US-G only): 12 – 10 AWG
• ATS AC to generator (TSS-200A-US-G only): 4 – 1/0 AWG
• EGC: 8 – 6 AWG, insulated or bare
Always calculate conductor AWG based on wire length and current load
.
Load Connections
To connect the ATS to the main (whole-home backup) or essential loads (partial-home backup)
panel:
1. Connect ground and neutral conductors to the ground and neutral bars and power
conductors to the
LOAD L1
and
L2
terminals. Torque to 22.5Nm.
2. Terminate conductors at a main or essential loads panel.
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