Hawaiian Electric (Hawaii Island) interconnection application

Documents Hawaiian Electric (Hawaii Island) asks for

• Interconnection application formCIT application with project system components (each battery inverter + storage listed) Gridpol prepares this.
• Letter of authorization / designated agent formCustomer Authorization & Acknowledgement form (latest version, all pages)
• Single-line diagram (one-line)Must show AC disconnect(s) covering entire facility incl. storage; service address, customer name/contact, revenue meter no., contractor info Gridpol prepares this.
• Site plan / site layoutSame identifying info as SLD Gridpol prepares this.
• Other utility-specific document (when applicable)Program application form (SRE Export/Non-Export ± BYOD Plus); DER Amendment form for equipment changes; property deed/trust documents/BREG authority if ownership records out of date
• Load calculation (when applicable)Max/min site loads without generation for systems ≥30 kW
• Photos (meter, main panel, equipment)Validation packet photos after installation
• Interconnection agreementGenerated by CIT, DocuSign after inspection

How the Hawaiian Electric (Hawaii Island) process runs

1. Customer or contractor creates CIT account and submits application (program type, contractor, system components, SLD, site plan, authorization form)
2. Completeness review (corrections requested if errors) -> technical review; supplemental review/studies/utility upgrades if needed -> approval to install
3. Install; submit DER Amendment/revision if anything differs from application
4. Contractor submits Project Validation packet (post-installation info, photos)
5. Validation review; possible onsite compliance check
6. Agreement execution via DocuSign (no changes to agreement language)
7. Meter change; PTO email from CIT

Fees

Utility fees are paid by the installer or customer; they are not part of the Gridpol plan.

Size levels and limits

SRE Export and Non-Export: no project size limit per program page.

Storage, EV and stamps

Common issues the utility lists

• Components (make/model/qty) inconsistent with SLD
• Obsolete Customer Authorization form version / mixed pages
• SLD missing AC disconnect covering storage
• Wrong TMK format (list example is Oahu-specific: 1 + 12-digit TMK; use island prefix)
• SLD/site plan missing address, customer, meter no., contractor info
• Ownership records (trust/company/out-of-date) without supporting documents
• Design not matching selected program type
• Unaddressed flagged comments at Completeness Review

Gridpol’s pre-submission check covers these before we file.

Sources

• Hawaiian Electric - Especially for Contractors: https://www.hawaiianelectric.com/products-and-services/smart-renewable-energy-programs/especially-for-contractors (retrieved 2026-11-13)
• Hawaiian Electric Smart Renewable Energy programs: https://www.hawaiianelectric.com/products-and-services/smart-renewable-energy-programs (retrieved 2026-11-13)
• Customer Interconnection Tool Guide for Contractors: https://www.hawaiianelectric.com/documents/products_and_services/customer_renewable_programs/cit_how_to_guide.pdf (retrieved 2026-11-13)
• Common Solar Installer Errors that Delay the Interconnection Process (12/2021): https://www.hawaiianelectric.com/documents/products_and_services/customer_renewable_programs/common_solar_installer_errors.pdf (retrieved 2026-11-13)
• Common Discrepancy List (10/2022): https://www.hawaiianelectric.com/documents/products_and_services/customer_renewable_programs/common_discrepancy_list.pdf (retrieved 2026-11-13)
• Hawaiian Electric Portal Guide for Customers - Smart DER Export Only application (CIT; Oahu/Maui County/Hawaii Island contacts): https://www.hawaiianelectric.com/documents/products_and_services/customer_renewable_programs/sre_export_only_application.pdf (retrieved 2026-11-13)
• Hawaiian Electric FAQ - interconnection timelines and fees: https://www.hawaiianelectric.com/customer-service/frequently-asked-questions?FAQFilter1=846&page=2 (retrieved 2026-11-13)