Cross an invisible line on a Texas county road and everything about your interconnection changes. Electric cooperatives serve enormous swaths of rural and fast-growing exurban Texas — Pedernales west of Austin, CoServ in the booming north-DFW counties, Bluebonnet east of Austin, and dozens more — and they play by their own rulebook. Literally: the PUCT's TDU interconnection rule mostly doesn't govern them. Under §25.211's own application language, only a narrow slice of the rule applies to electric cooperatives; the rest of a co-op's interconnection policy is set by the co-op's board.
What that means in practice
Each co-op writes its own DG policy, and they genuinely vary — on all of the axes that matter to your schedule and your customer's economics:
- Process and paperwork. Application forms, engineering review depth, agreement terms, and inspection practices are co-op-specific. Some co-ops run polished portals; others process DG applications through a staff engineer's inbox. Reported industry experience puts some co-op timelines well beyond metro-TDU norms, especially where there's no dedicated interconnection staff.
- Fees. Application fees, study fees, and meter charges are board-set and appear in the co-op's tariff or DG policy — never assume the TDU convention of no-fee residential interconnection carries over.
- Compensation. Co-ops set their own export crediting — some offer generous buyback, others credit exports at avoided-cost rates that materially change system-sizing math. There's no REP shopping here; the co-op's rate schedule is the whole story. Size systems to the co-op's crediting structure, not to a generic Texas assumption. (Context: Texas Doesn't Have Net Metering.)
- Technical standards. Certified UL 1741 inverters are the near-universal baseline, but disconnect specs, external-generation placards, and insurance or indemnification clauses in the interconnection agreement vary co-op to co-op. Read the agreement — some contain terms (liability, access, curtailment) worth flagging to the homeowner before signing.
Permitting usually pairs with this differently too: much co-op territory is unincorporated, so there may be no city permit at all — which makes the co-op's review the only technical checkpoint the project gets. Our unincorporated-areas guide covers that half; the state electrical code still applies to the work itself.
The operational playbook for co-ops
Build a per-co-op profile the first time, reuse it forever. The first job with a new co-op costs you a research cycle: pull the DG policy and tariff from the co-op's site, call the engineering contact, capture the forms, fees, timeline expectations, and crediting rates. The tenth job costs nothing — if the first job's knowledge was written down somewhere better than a coordinator's memory. This is the highest-leverage habit in co-op country, where an installer might touch fifteen different co-ops a year, three jobs each.
Set expectations by co-op, not by "Texas." A homeowner two miles from an Oncor neighbor may wait meaningfully longer for authorization — say it up front, in writing, with the co-op's name on it.
Escalate personally. Co-ops are member organizations with small DG teams; a polite phone relationship with the staff engineer moves applications in a way portal-poking never will.
TexPTO treats every co-op as a first-class jurisdiction: its forms, fees, crediting notes, and contacts live in the requirements profile, and every job in that territory inherits them — so the institutional knowledge from job one is still there when job two arrives eight months later.
FAQ
Do PUCT interconnection rules apply to co-ops? Almost entirely no — §25.211 applies to electric cooperatives only in a narrow respect; the co-op's own board-adopted policy governs the process.
Do Texas co-ops offer net metering? Each sets its own crediting — ranging from favorable buyback to avoided-cost rates. Check the specific co-op's rate schedule before sizing or quoting.
Are co-ops slower than the big utilities? Often, though not always — variance is the real story. Track per-co-op timelines and quote from those.
Is a city permit needed in co-op territory? Only if the address is inside a permitting municipality; much co-op territory is unincorporated, where the co-op's review and the state electrical code are the effective checkpoints.
Sources
- PUCT Substantive Rule §25.211 (application subsection limiting applicability to electric cooperatives): https://www.puc.texas.gov/agency/rulesnlaws/subrules/electric/25.211/25.211.pdf
- Reported co-op interconnection timeline variance: https://energyscaperenewables.com/post/texas-solar-permitting-county-ahj-guide-epcs/
- Example co-op-published PUCT rule reference (KPUB): https://www.kpub.com/wp-content/uploads/2019/10/TPUC-25.211.pdf
General information, not legal advice. Every co-op's policy is its own — verify directly with the serving cooperative.