CAISO Interconnection Queue Map
California's interconnection queue on a map, re-synced every fifteen minutes — with the status and date history that a queue download leaves out.
Explore the Map
In California, a queue position is not the scarce thing
CAISO studies interconnection requests in annual clusters, and getting through the study is only half the problem. The binding scarcity in this market is deliverability: the right to have your output counted as capacity is allocated separately, and demand for it has persistently exceeded what the transmission plan makes available.
That produces a situation developers in other markets find strange. A project can sit in the queue, complete its studies, and still lack the deliverability that makes its contract economics work. Reading aggregate queued megawatts as a proxy for future supply is particularly misleading here.
What the snapshots tell you that the cluster list does not
Because allocation is competitive and cluster-based, the composition of your cluster and the attrition within it matter more than your own filing. Projects withdraw, and dates move, and both change the picture for everyone else in the group.
We re-pull the CAISO queue every fifteen minutes and keep every snapshot, retaining the previous value whenever a status or a date changes. That turns a static cluster list into a record of what is actually happening: which projects are slipping, which have gone quiet, and which have withdrawn.
What Sungarden loads for CAISO
- Queue entries, re-synced every 15 minutes
- Schedule-slip tracking — we keep the previous and new withdrawal, completion and commercial-operation dates
- Alerts when a project's status changes or it withdraws
- Daily queued-capacity history by status and fuel type
- Not loaded yet: Points of interconnection as mapped geometry
- Not loaded yet: Load and pricing zone boundaries
- Not loaded yet: Substations
- Not loaded yet: Parcel boundaries and ownership within the footprint
- Not loaded yet: Utility feeder hosting capacity within the footprint
Queue entries are the ISO's own records, republished rather than recalculated. Capacity figures are what the developer reported at filing, and queued megawatts are not deliverable megawatts — several markets allocate deliverability separately from queue position.
Frequently asked questions
What is Transmission Plan Deliverability?
CAISO allocates deliverability — broadly, the ability for a resource's output to count toward resource adequacy — separately from interconnection queue position, based on what the transmission plan supports. Because requests have exceeded available deliverability, projects can hold queue positions without securing it. This is a significant commercial distinction and the rules around it change, so confirm the current allocation process with CAISO.
How does the CAISO cluster process work?
Interconnection requests are grouped into annual clusters and studied together, with identified network upgrades allocated among cluster members. As in every US market the procedures are being revised under FERC Order 2023 compliance, so confirm current cluster timing and requirements with CAISO.
Why is aggregate queued capacity misleading in California?
Two reasons compound here. Withdrawal rates are high across all US queues, and separately a project can be queued without holding deliverability. So the gap between queued megawatts and megawatts that will actually serve load is wider than the raw total suggests.
Do you carry California parcel data?
Not today. Parcel boundaries and ownership are limited to New York and Minnesota, so in CAISO territory you get the queue, the timing history and the alerts, but not a land layer underneath them. If California parcel coverage would make this useful to you, tell us — that is how we prioritise.
How current is the queue data?
We re-pull the CAISO queue every fifteen minutes and keep every snapshot, so you get each project's status and date history rather than only its present state, with alerts when a project withdraws or moves its dates.
Other interconnection queues
Or start from the interconnection queue overview to compare every market we track.
Track the cluster, not just your place in it.
Get Started For FreeSungarden is an independent platform and is not affiliated with or endorsed by CAISO (California Independent System Operator).
Queue data is republished from CAISO'sown public interconnection queue postings. We do not independently verify it, and where our records differ from the ISO's published queue the ISO's data governs. Queue entries reflect what a developer reported at the time of filing: capacity figures, in-service dates, and points of interconnection all change, and a project appearing in the queue is not evidence that it will be built.
Queued capacity is not deliverable capacity. Several markets allocate deliverability separately from queue position, so a project can hold a queue position without being able to deliver energy, and aggregate queued megawatts should not be read as committed supply.
Descriptions of interconnection processes on this page are general summaries. Interconnection rules are being revised across every market under FERC Order 2023 and its compliance filings, so procedures, timelines and study structures change. Nothing here is legal or engineering advice or a substitute for the ISO's current tariff and business practice manuals — confirm applicable requirements with the ISO.