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Investor-owned utilityBlack Diamond Power interconnection application
Black Diamond Power is an investor-owned utility serving 3,243 residential customers in West Virginia (EIA-861, 2025). Gridpol files Black Diamond Power interconnection applications for licensed installers – solar, storage and EV chargers – with single-line diagram and site plan, unlimited for $500 a month.
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Partly researched from official sources. verify on first project: no company website (blackdiamondpower.com parked) and no company tariff/forms found online; data is from statewide PSC rule 150CSR33 only. A PSC filing reportedly stated the company had no net metering/interconnection in its territory, and it is under PSC general investigation (2025-26). Confirm contact, filed N.M.S. tariff, forms and meter process with the utility/PSC.
Black Diamond Power at a glance
Black Diamond Power Co
TypeInvestor-owned utility
EIA utility ID1764
Residential customers3,243 (EIA-861, 2025)
Net-metered residential customersnone reported
Service territory4 counties in West Virginia
Who submitsPer WV PSC rule 150CSR33 (statewide): the Customer-generator / Interconnection Customer submits the Interconnection Request (Appendix A Level 1, Appendix B Level 2) and one-line diagram to designated company personnel; utilities must accept electronic filing. Company-specific contact/channel not found (blackdiamondpower.com is a parked domain).
Export compensationNEM – Tariff N.M.S. (Net Metering Service) - 150CSR33 Form No. 1
Rule requires each WV utility to file Tariff N.M.S.; credit at full retail rate or Commission-approved net metering credit, excess kWh carried forward, no payout at termination. Black Diamond's own filed tariff sheet not found online.
150CSR33 Level 1: completeness notice within 10 business days; verification of screens up to 15 business days after complete request; deficiencies after conformance test notified within 10 business days.
Documents Black Diamond Power asks for
- Interconnection application form150CSR33 standard Interconnection Request: Appendix A (Level 1) or Appendix B (Level 2) Gridpol prepares this.
- Single-line diagram (one-line)One-line diagram of the net metering facility (Tariff N.M.S. Form No. 1) Gridpol prepares this.
- UL 1741 / IEEE 1547 certification (when applicable)Level 1 requires inverter-based, non-islanding, UL listed/certified equipment
- Proof of insuranceGeneral liability: $100k up to 50 kW; $500k >50-500 kW; $1M >500 kW
- Final inspection sign-offApproval by local/municipal electric code officials; proof of qualified installation (licensed electrician certification)
- Other utility-specific documentCertificate of Completion (Appendix D) plus IEEE 1547 conformance test schedule/results
- Interconnection agreementStandard Level 1 agreement (Appendix E); three executed copies submitted with Certificate of Completion
How the Black Diamond Power process runs
- Request forms from the utility (company provides forms on request)
- Submit Interconnection Request (Appendix A/B), one-line diagram and fee ($30 Level 1)
- Utility completeness notice (10 business days) and Level 1 screening (up to 15 business days)
- Install; obtain local/municipal electric code approval; licensed electrician certification
- Submit Certificate of Completion, three executed interconnection agreements and IEEE 1547 test plan; perform conformance test
- Utility installs net meter (blank meter socket required); parallel operation after utility authorization
Fees
| Fee | Applies to | Note |
|---|---|---|
| $30 max | Level 1 (≤25 kW, inverter-based, ≤69 kV) | 150CSR33 Form 2 §4.1.2 |
| $50 + $1/kW max | Level 2 (≤2 MW) | 150CSR33 Form 2 §4.2.2 |
Utility fees are paid by the installer or customer; they are not part of the Gridpol plan.
Size levels and limits
| Level | Up to | Note |
|---|---|---|
| Level 1 | 25 kW | 150CSR33; inverter-based, UL listed, ≤69 kV |
| Level 2 | 2000 kW | 150CSR33 |
| Net metering cap | 50 kW |
Statewide rule, not company page. Customer-generator max is 25 kW residential/500 kW commercial/2 MW industrial, but 50 kW for utilities serving fewer than 30,000 residential customers (applies to Black Diamond as a small utility - confirm). Aggregate net metering cap 3% of peak.
Sources
- WV PSC Legislative Rule 150CSR33 Net Metering Arrangements and Interconnections (eff. 11/15/2019), incl. Tariff N.M.S. Form 1 and Interconnection Standards Form 2: https://apps.sos.wv.gov/adlaw/csr/readfile.aspx?DocId=52744&Format=PDF (retrieved 2026-11-13)
- WV Code 24-2F-8 net metering: https://code.wvlegislature.gov/pdf/24-2F-8/ (retrieved 2026-11-13)
West Virginia interconnection rule
Rule sections 1-8 read; interconnection levels, timelines, fees, insurance and disconnect are in Form No. 2/appendices which are PDFs not retrievable (LII links 404). Fill from WV PSC copy of 150CSR33 Form 2.
Public Service Commission of West Virginia
Interconnection ruleW. Va. Code R. 150-33 (Rules Governing Electric Utility Net Metering Arrangements and Interconnections), interconnection standards in Form No. 2 – Rules Governing Electric Utility Net Metering Arrangements and Interconnections · source
Applies toElectric utilities (electric distribution companies selling at retail in WV, per 150-33-2); coverage of cooperatives/municipal utilities not confirmed
Application formStandard net metering tariff (Form No. 1) and interconnection agreement/standards and technical requirements (Form No. 2) incorporated in the rule
FeesUtility may not impose any fee, equipment or insurance requirement unless authorized by the rules and in the approved tariff (150-33-3.7); customer pays incremental upgrade costs and requested tests/inspections (3.5).
InsuranceOnly as specifically authorized by the rules and included in the Commission-approved tariff (150-33-3.7); amounts in Form 2 not read.
Export compensationNEM – W. Va. Code 24-2F-8; W. Va. Code R. 150-33-3, 150-33-5
Customer-generator limits: residential 25 kW, commercial 500 kW, industrial 2 MW. First come first served until 3% of utility's prior-year peak demand (0.5% reserved for residential); utility may seek limit when DG exceeds 15% (3-phase) / 5% (1-phase) of line section peak.
Not determined from rule text.
- W. Va. Code R. 150-33-1 General: https://www.law.cornell.edu/regulations/west-virginia/W-Va-C-S-R-SS-150-33-1 (retrieved 2026-11-13)
- W. Va. Code R. 150-33-3 General Provisions: https://www.law.cornell.edu/regulations/west-virginia/W-Va-C-S-R-SS-150-33-3 (retrieved 2026-11-13)
- W. Va. Code R. 150-33-8 Interconnection Obligation: https://www.law.cornell.edu/regulations/west-virginia/W-Va-C-S-R-SS-150-33-8 (retrieved 2026-11-13)
- W. Va. Code R. 150-33-2 Definitions: https://www.law.cornell.edu/regulations/west-virginia/W-Va-C-S-R-SS-150-33-2 (retrieved 2026-11-13)
Other utilities in West Virginia
$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.