AC-Coupled Third-Party Battery Installation

AC-coupled third-party battery installation requires UL-listed components, proper utility interconnection approval, and clear ESS circuit labeling. Battery inverter connects to a dedicated breaker on the Kora Smart Panel with no DC conductors entering the panel.

Code Reference (NEC)

• NEC 706 – ESS requirements
• NEC 705 – AC interconnection
• NEC 110.3(B) – Listing compatibility

Requirements

• UL-listed battery and inverter
• Utility interconnection approval (if grid-tied)
• Compatible neutral/grounding scheme
• Label ESS circuits clearly: “Energy Storage System – AC Coupled”

Wiring Overview

Battery inverter → Dedicated breaker → Kora Smart Panel

1. Battery AC output lands on a designated breaker or backup input
2. No DC conductors enter the Smart Panel
3. Follow manufacturer requirements for disconnects and OCPD

Functional Boundaries

• Kora does not send charge/discharge commands to most third-party batteries
• Kora controls load shedding and prioritization
• CT accuracy is critical

Important Notes

• Backup runtime depends on battery system limits and circuit priorities
• Verify export limits are enforced per utility rules