Largest utilities in Puerto Rico
State power authority · 1,387,840 residential customers · Puerto Rico
Interconnection process and documents →Puerto Rico interconnection rule
lumapr.com and energia.pr.gov block direct fetch; only LUMA process pages (archive) reviewed. Interconnection regulation number/text (PREPA DG interconnection regulation), fees, disconnect rule and Act 114-2007 amendment status NOT verified; web search budget exhausted in this run.
Puerto Rico Energy Bureau (PREB / Negociado de Energía de Puerto Rico, NEPR)
Interconnection rule– PREPA/LUMA distributed generation interconnection and net metering regulation (implemented by LUMA Energy as T&D operator); net metering statute Act 114-2007 (as amended) · source
Applies toLUMA Energy (operator of PREPA's transmission and distribution system), the sole electric distribution utility in Puerto Rico, under PREB oversight.
Application formOnline application via LUMA Distributed Generation portals: 'Portal Conexión LUMA' for expedited projects up to 25 kW; 'Portal PREP LUMA' for other projects; net metering agreement signed in the portal. LUMA requires a Smart Inverter Settings Sheet per inverter with IEEE 1547-2018 compliance report (Technical Bulletin 2024-001).
TimelinesLUMA steps: application via portal -> completeness review -> technical validation (field evaluation/supplemental study if needed) -> approval within 30 days of request -> customer signs net metering agreement (and insurance if > 300 kW) -> bidirectional meter installation -> rate change on next bill -> annual net credit applied in June for prior 12 months.
InsuranceLiability insurance required for distributed generation capacity above 300 kW (LUMA net metering steps).
Export compensationNEM – Act 114-2007 (Net Metering Program), as amended
LUMA credits exported energy via net metering with bidirectional meter; annual excess credit applied each June for the preceding 12 months. Statutory amendments (e.g., 2024 extension of current net metering terms) and the PREB/PREPA regulation numbers could not be verified in this pass.
No municipal utilities; PREB Regulation 9117 (Regulation on Energy Cooperatives in Puerto Rico, eff. Nov. 9, 2019) governs energy cooperatives (interconnection terms not reviewed).
| Level | Up to | Criteria / review / fee |
|---|---|---|
| Expedited (<= 25 kW) | 25 kW | Registered through Portal Conexión LUMA; system installed by certified renewable energy installer · Approval communicated within 30 days of the customer's request (LUMA net metering steps) |
| Other projects (> 25 kW / transmission-connected) | Portal PREP LUMA; field evaluations and supplemental study may be required (study paid by customer through portal); additional activities/documents for > 25 kW or transmission-connected · Supplemental study paid by customer |
- LUMA - Pasos de Medición Neta (archive.org copy, Aug. 2026): https://web.archive.org/web/20260810020941/https://lumapr.com/medicion-neta/ (retrieved 2026-11-13)
- LUMA - Energía Renovable (portals, Technical Bulletin 2024-001) (archive.org copy): https://web.archive.org/web/20260903013403/https://lumapr.com/residencial/energia-renovable/ (retrieved 2026-11-13)
- NEPR - Reglamentos list (archive.org copy): https://web.archive.org/web/20260814175528/https://energia.pr.gov/reglamentos/ (retrieved 2026-11-13)
All 1 utilities in Puerto Rico
Residential customers in Puerto Rico per EIA-861 (2025). Customer counts = bundled + delivery-only service (EIA-861 Part A + Part D). Service territory is reported by county; a county can be served by several utilities.
$500 / month
Unlimited interconnection applications. 12-month agreement, signed online. The agreement starts the day you sign; first invoice right away, then monthly.
- Unlimited interconnection applications
- Single-line diagram and site plan for every application
- Pre-submission check against the utility’s requirements
- Homeowner e-signature link for the authorization
- Filing in your utility portal accounts or by the utility’s method
- Utility questions, corrections and resubmissions
- Follow-up through approval, inspection and PTO
- Customer list, exports, API and webhooks
Applications are typically submitted within 2 business days after complete documents. Utility review times are set by each utility.