El Paso breaks nearly every Texas solar rule your team has internalized. It sits outside ERCOT, it's served by a traditional vertically integrated utility — El Paso Electric (EPE) — there's no REP shopping, and most surprising of all to installers arriving from the I-35 corridor: most EPE solar customers qualify for an actual net metering rate, netting generation against consumption. If you expand west, treat El Paso as its own market, because it is one.
The EPE interconnection process
EPE publishes its DG Renewable Energy Interconnection process for facilities up to 10 MW, and its guidance to contractors carries a warning worth taking literally: a system built before EPE approval risks the customer paying for equipment that doesn't meet EPE's interconnection requirements. The application-first sequence is the El Paso norm, and the documented requirements are specific:
- A one-line diagram and site diagram with every application (signed originals, files under 10 MB), with the one-line identifying all major equipment including the utility-accessible generation disconnect device and the EPE metering point — EPE publishes one-line specs and a sample to match.
- Phase matching, explicitly. EPE calls out verifying that the delivered service phase matches the installed generation phase — single-phase service means a single-phase inverter. It's a named rejection category; check it at design.
- Field inspection sequencing quirks. EPE runs its own solar system field inspections — and its published guidance includes genuinely local details, like resolving legacy water-heater meter removals (a call to Customer Care) before requesting the solar field inspection. Small stuff, but exactly the kind of local knowledge that separates a smooth El Paso operation from a confused one.
On compensation: most customers installing solar qualify for EPE's net metering rate, which nets renewable generation against consumption — a materially different (and simpler) sales conversation than the REP-buyback market covering the rest of Texas. Two program interactions to flag in proposals: DG customers aren't eligible for EPE's Texas Community Solar Program or Budget Billing, and enrollees are automatically removed on interconnection.
The city side
The City of El Paso permits solar through its standard development-services process — building/electrical permitting with the usual Texas package (site plan, one-line, specs, structural documentation where required) under the city's adopted codes, with unincorporated El Paso County following the lighter county pattern. The state constants still hold at the far end of I-10: TDLR licensing, the NEC 2023 state floor, §202.010 HOA protections, and the 45-day municipal clock.
Operating El Paso as its own market
Three adjustments for teams expanding west: retrain sales on net metering math (your ERCOT buyback talk track is wrong here — in the customer's favor); re-sequence ops around EPE's approval-before-build expectation and its inspection quirks; and rebuild the proposal's program fine print (community solar and budget-billing exclusions belong in the conversation, not the surprise pile). El Paso is also the cleanest rehearsal for national expansion your company can get without leaving Texas — a non-ERCOT, net-metered, vertically integrated market is what much of the rest of the country looks like. TexPTO holds El Paso as a distinct jurisdiction-plus-utility profile, so jobs there inherit EPE's sequence and the city's checklist instead of an ERCOT template that never applied.
FAQ
Is El Paso part of ERCOT? No — EPE operates in the Western Interconnection, outside ERCOT's market structure, which is why the retail-choice/REP model doesn't apply.
Does El Paso have net metering? Most EPE solar customers qualify for EPE's net metering rate, netting generation against consumption — verify current tariff terms before quoting.
Can we install before EPE approves? EPE's own guidance warns against it: pre-approval builds risk non-compliance the customer pays for. Application first.
Does the homeowner keep budget billing or community solar with rooftop solar? No — EPE's guidance excludes DG customers from both, with automatic removal at interconnection.
Sources
- El Paso Electric, Texas Interconnection of Facilities up to 10 MW (application requirements, one-line specs, phase matching, net metering rate, program exclusions, inspection sequencing): https://www.epelectric.com/residential/rooftop-solar/texas-interconnection-of-facilities-up-to-10-mw
- TDLR NEC 2023 adoption (state code floor): https://www.tdlr.texas.gov/news/2022/11/30/2023-national-electrical-code-is-almost-here
General information, not legal advice. Verify current EPE tariff terms and City of El Paso requirements before designing or quoting.