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
- Battery AC output lands on a designated breaker or backup input
- No DC conductors enter the Smart Panel
- 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
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