Credit agreements and long-term debt (Tables)

3 Months Ended

Mar. 31, 2026

Debt Disclosure [Abstract]

Schedule of Credit Agreements

The following table provides the credit agreement capacity, outstanding and undrawn components as of March 31, 2026 and December 31, 2025.

	As of March 31, 2026						As of December 31, 2025
(in millions)	Capacity		Outstanding		Undrawn		Capacity		Outstanding		Undrawn
HEI corporate:
Unsecured revolving line of credit	$	300	$	15	$	285	$	300	$	20	$	280
Hawaiian Electric:
Unsecured revolving line of credit	300		—		300		300		—		300
ABL Facility1	218		—		218		240		—		240
Borrowing from HEI - standing commitment letter2	75		—		75		75		—		75
Total Hawaiian Electric	593		—		593		615		—		615
Total Consolidated HEI2	$	818	$	15	$	803	$	840	$	20	$	820

1     Borrowing capacity is calculated based on eligible customer accounts receivable balance at the end of each period.

2     $75 million borrowing from HEI - standing commitment letter is eliminated in total consolidated HEI amounts.

Schedule of Long-Term Debt

The following table summarizes the long-term debt, net for the Company and Hawaiian Electric as of March 31, 2026 and December 31, 2025.

(in thousands)	March 31, 2026		December 31, 2025
All other1:
HEI 2.48%-6.10% senior notes due 2028-2052	$	207,738	$	207,738
HEI revolving credit facility SOFR + 2.50%, due 20302	15,000		20,000
Less unamortized debt issuance costs	(567)		(596)
All other long-term debt, net	222,171		227,142
Hawaiian Electric:
Special purpose revenue bonds and unsecured senior notes	2,195,000		2,195,000
Less unamortized debt issuance costs	(11,793)		(12,167)
Less current portion long-term debt, net of unamortized debt issuance cost	(124,990)		(124,959)
Hawaiian Electric long-term debt, net	2,058,217		2,057,874
HEI consolidated long-term debt, net	$	2,280,388	$	2,285,016

1     Excludes Mahipapa’s non-recourse loans amounting to $54 million, as of March 31, 2026 and December 31, 2025, which are classified as “Liabilities held for sale” on the Company’s Condensed Consolidated Balance Sheets. See “Assets held for sale-Mahipapa” in Note 3.

2     As of March 31, 2026 and December 31, 2025, the HEI revolving credit facility’s weighted-average interest rate was 6.17% and 6.32%, respectively. See “Syndicated credit agreements” above.