Guides
Permitting and interconnection, explained for solar installers.
Permitting
Permission to Operate is the last clock in every project and the one nobody watches. Typical waits by utility, the three delay patterns, and what to do when a project is approved but not interconnected.
The five stages where projects actually stall — intake, review, rejection, inspection, PTO — what silently resets each clock, and what to do at every stage.
Pick a jurisdiction and a must-be-running-by date — the calculator back-solves permit, install, inspection, and PTO clocks to the latest safe submission date.
How Texas contractors use an accredited third-party reviewer to skip municipal permit backlogs — and why it does not touch interconnection.
What California’s automated permitting laws require, which jurisdictions run SolarAPP+, and how long permits really take.
Utility interconnection
LADWP interconnection process, the documents typically required, and the gap between permit approval and PTO.
PG&E interconnection process, the documents typically required, and the gap between permit approval and PTO.
SCE interconnection process, the documents typically required, and the gap between permit approval and PTO.
SDG&E interconnection process, the documents typically required, and the gap between permit approval and PTO.
Oncor interconnection process, the documents typically required, and the gap between permit approval and PTO.
CenterPoint Energy interconnection process, the documents typically required, and the gap between permit approval and PTO.