US Solar Codes P3 Reference 2 min read Reviewed June 4, 2026

NEC 480 (Storage Batteries)

NEC Article 480 governs stationary storage batteries — supplemented by NEC 706 for modern ESS.

Definition

NEC Article 480 governs stationary storage batteries (lead-acid, nickel-cadmium, vented vs. sealed). Modern lithium ESS primarily governed by NEC 706, but 480 still applies for ventilation and battery room requirements.

Key Takeaways

  • NEC 480 = stationary storage batteries.
  • Largely superseded by NEC 706 for new ESS.
  • Battery room ventilation requirements still apply.
  • See NEC 706 + UL 9540 for current ESS code.

Frequently Asked Questions

1 commonly searched questions about NEC 480 (Storage Batteries).

What is NEC 480?
Stationary storage battery code. Now largely superseded by NEC 706 for modern ESS, but applies for ventilation and battery room safety.

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