PNM Interconnection: Find Power, Navigate the Queue, Secure Your Site
PNM, serving central and northern New Mexico, operates outside an ISO and studies generators in one annual cluster. Large loads connect as retail customers under special contracts until a large-load tariff is established. Explore PNM's interconnection process with our interactive step-by-step guide, then use LandGate’s capacity and parcel data to find the sites that can actually connect.
PNM Interconnection at a glance
Quick facts | PNM |
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Who runs it | PNM runs its own transmission system and balancing area, and isn’t part of an ISO. It trades in CAISO’s Western Energy Imbalance Market and plans to join the Extended Day-Ahead Market in October 2027. FERC approves its transmission tariff, and the New Mexico PRC oversees retail service. |
Governing rules | PNM’s interconnection procedures (Attachment N of its transmission tariff), plus 2026 business practices on site control, study subgroups and planned projects in study models |
Generator study process | One annual cluster, filed through PNM’s PowerClerk portal: a 45-day window, a 60-day engagement window, a 150-day Cluster Study, a 150-day restudy if needed, and a 150-day facilities study |
Current cluster | Cluster 20 has been in study since October 24, 2026, with 20 requests totaling 4,397.5 MW. About 87% of its capacity is storage or solar plus storage. The report is due by March 23, 2027. |
Next window | Opens July 10, 2027 |
Generator costs | A $5,000 non-refundable application fee and a study deposit of $150,000 to $250,000 for projects of 80 MW or more, plus a readiness deposit of twice the study deposit. The readiness deposit rises to 5% of upgrade costs after the Cluster Study and 10% at the facilities study, with 20% total security at the interconnection agreement. |
Withdrawal penalties | None before the Cluster Study. After that, at least the study deposit, rising to 5% of upgrade costs during a restudy, 10% during the facilities study and 20% after signing. |
Site control | At least 90% at filing, with minimum usable acreage by technology: 5 acres per MW for solar, 50 acres per MW for wind and 0.05 acres per MW for battery storage |
How large loads connect | As PNM retail customers, working with PNM directly. PNM has no published queue, form, fee or size threshold for large loads. Wholesale customers add load under PNM’s transmission tariff instead. |
Large load tariff status | None in effect. Very large customers are served under special contracts approved by the PRC. PNM said in July 2026 that it would file a large-load tariff later in 2026, and none had been filed as of October 29. |
Large load demand | Three customers had signed agreements for 350 MW of new load in 2029–2032, as of May 2026 |
Last updated | November 3, 2026 |
PNM Generator Interconnection Process
Generator interconnection,
step-by-step
PNM studies generators in one annual cluster, with a 45-day window that opens every July 10. Deposits rise at each decision point, and PNM requires minimum usable acreage for site control based on the type of project.
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Check the queue, heatmap and study reports. PNM posts its queue, past study reports and a heatmap of where earlier studies found room at each point of interconnection.
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Apply during the July window. Submit through PNM’s PowerClerk portal with a $5,000 fee, a study deposit, a readiness deposit of twice the study deposit and at least 90% site control.
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Customer engagement window. Over 60 days, PNM holds a scoping meeting, groups projects into subgroups by location, and developers sign a Cluster Study Agreement.
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Cluster Study. PNM studies the cluster by subgroup over 150 days and assigns each project a share of upgrade costs.
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Continue or withdraw. Within 20 days of the results meeting, developers confirm site control and raise their readiness deposit to 5% of upgrade costs.
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Restudy and facilities study. PNM restudies the cluster if needed. Developers then raise their deposit to 10% of upgrade costs, and PNM designs the facilities over 150 days.
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Sign the interconnection agreement. Developers post total security of 20% of upgrade costs, show a development milestone and sign the agreement. Delivering the plant’s output also needs a separate transmission service request.
PNM Large Load Interconnection Process
Large Load interconnection,
step-by-step
Large loads in PNM’s territory connect as retail customers under New Mexico rules, with no public queue or form. Today, very large customers are served under special contracts approved by the PRC, and PNM has said it will file a dedicated large-load tariff. Confirm current requirements with PNM.
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Start with PNM. A new data center works with PNM directly, not through the generator queue.
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Retail or wholesale. A wholesale customer serving the load from PNM’s grid adds it as network load under PNM’s transmission tariff instead.
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Share your load details. The customer gives PNM its expected load, location, ramp schedule and in-service date, which PNM uses in its planning forecasts.
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Sign a reimbursement or facilities agreement. Once signed, PNM treats the load as a planning commitment and invests to serve it on time.
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PNM plans supply and wires. PNM adds the load to its resource and transmission plans and asks the PRC to approve new resources. A 2025 state law, SB 170, also lets PNM build ahead of load at state-certified sites.
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Special contract or tariff. Today, very large customers sign a special service contract that the PRC must approve. PNM’s planned large-load tariff would add a standard option.
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Energize. The load takes service once facilities are built and the contract is in place.
What's changed recently in PNM interconnection
Last updated November 2026
PNM finished clearing its old backlog in 2026 and is now studying its first regular annual cluster under stricter site control rules. For large loads, PNM is planning new resources for data center demand and has said it will file New Mexico’s first PNM large-load tariff. If your project is in PNM’s territory, check which of these changes apply before the next window or contract.
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May 11, 2026: PNM finalized its Transitional Cluster reports, covering 35 projects from its old Clusters 15 through 19.
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May 29, 2026: PNM asked the PRC to approve new resources for 2029–2032, sized partly for 350 MW of new large load under signed agreements and 200 MW under SB 170.
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July 2026: PNM told state lawmakers it would file a large-load tariff later in 2026, and the PRC announced plans for a large-load working group.
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July 10 – August 24, 2026: The Cluster 20 window drew 20 requests totaling 4,397.5 MW, about 87% of it storage or solar plus storage.
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August 19, 2026: PNM’s updated site control rules took effect, with minimum usable acreage by technology.
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October 16, 2026: A new PNM business practice took effect, setting which planned transmission projects go into its study models.
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October 24, 2026: The Cluster 20 study began.
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Coming up: PNM’s large-load tariff filing, promised for later in 2026; the Cluster 20 report, due by March 23, 2027; the next window, opening July 10, 2027; and PNM joining CAISO’s Extended Day-Ahead Market, expected October 1, 2027.
How LandGate Helps with PNM Interconnection
PNM has strict site control requirements - a 100 MW wind project needs at least 5,000 usable acres, and LOIs don’t qualify. For large loads, site selection is critical before signing a service agreement. LandGate brings the data behind those decisions into one platform.
Get your projects on the grid faster with reliable transmission data.
Find parcels large enough for PNM
PNM requires minimum usable acreage by technology, from 5 acres per MW for solar to 50 for wind, and roads, water and restricted land don’t count. Search parcels by criteria such as distance to a substation and available offtake capacity to find sites that clear PNM’s acreage screen before the July window.
See what's queued near your POI
PNM groups each cluster into subgroups by location, so the projects near yours shape your results. LandGate’s automated offtake capacity studies show substation details, capacity results, limiting elements like transmission lines and transformers, and queue information so you can analyze what's nearby instantly.
Choose a large load site before signing
Once a data center signs a reimbursement or facilities agreement, PNM starts investing to serve that site. LandGate’s Data Center Due Diligence Reports identifies the nearest transmission and distribution lines and ranks the closest substations by capacity available, so you commit to a site PNM can serve.
Turn interest into real site control
PNM requires ownership, a lease, an option or an easement, not letters of intent or term sheets. LandGate pairs its grid data with proprietary landowner leads and a map-based CRM to help you find, secure, and track the right parcels with your taem, including off-market properties with the right infrastructure.
