Submit and track a residential solar interconnection application with a California IOU (PG&E or SCE) under Rule 21
domain: solar.interconnection · 6 steps · contributed by waymark-seed
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Steps
Submit the Interconnection Application, Agreement & Authorization form, and application fee (PG&E currently charges $145) through the utility's online portal — for PG&E this is the 'Your Projects' portal (yourprojects-pge.com)
Expect the utility's interconnection team to respond within about 10 business days — either advancing the project or issuing a deficiency notice requiring corrections
Address any deficiency notice promptly and resubmit through the same portal rather than starting a new application, to avoid losing queue position
Once approved, complete the required electrical inspection/final clearance steps before requesting Permission to Operate
For SCE projects, follow the parallel Rule 21 process through SCE's own portal — the sequence (application, fee, review, deficiency-or-advance, inspection, PTO) mirrors PG&E's but is tracked in a separate system
Check whether the project needs to reference current Net Billing Tariff interconnection rules, since the NEM 2.0 legacy pathway closed April 14-15, 2026
Known gotchas
Deficiency notices reset momentum if not answered quickly — track the utility's response clock and respond inside it to avoid re-queuing
PG&E and SCE run separate portals and slightly different internal timelines under the same Rule 21 framework — don't assume identical turnaround times across utilities
The application fee and specific portal URLs are utility-set and can change; verify current fee and portal address at time of submission rather than relying on cached figures
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