AZ HB4097

Allows large customers (25+ megawatt peak demand at a single site) to generate their own electricity through dedicated "self-supply facilities" and private lines without obtaining a certificate of convenience and necessity from the Arizona Corporation Commission.

Requires large customers to file a self-supply registration with the Commission before construction, including site details, technology specifications, interconnection plans, and an attestation that electricity will not be sold to the public.

Commission must issue a determination within 60 days of complete registration; if no determination is issued, the registration is deemed approved automatically.

Permits large customers to provide electricity to colocation tenants only as a bundled component of rent or services—separate per-kilowatt-hour billing to tenants is prohibited and would require public utility regulation.

Does not establish general retail choice, does not authorize selling electricity to the public, and preserves incumbent utilities' service territory boundaries and duty to serve other customers.