Hawaii Renewables has commissioned a plant at Par Pacific's Kapolei refinery, the companies' project on Oahu confirmed in an announcement carried by Oil & Gas Journal.

The startup marks the arrival of new processing capacity at Hawaii's only operating refinery, the 94,000-bpd-capacity site at Kapolei that Par Pacific acquired from Chevron in 2013 and has operated since under its Hawaii subsidiary. Par has positioned the asset as both a fuels supplier to the island market and, increasingly, a platform for renewable fuels investment.

What do we know about the commissioning?

The announcement confirms that the Hawaii Renewables plant is now in operation at the refinery site. The commissioning completes a construction campaign at Kapolei aimed at adding renewable processing capability alongside the existing crude unit, and it gives Par a second renewable-fuels-adjacent project on the island following its earlier Sustainable Aviation Fuel (SAF) studies at the refinery.

Par Pacific has previously framed its Hawaii strategy around the state's fuel demand profile: isolated logistics, a single refinery, and a legislated push toward renewable transportation fuels. The Kapolei plant fits that template.

Why Kapolei?

Hawaii's fuel market depends almost entirely on the Kapolei refinery and imported product. Any capacity that adds local supply — conventional or renewable — carries outsized weight for the state's energy security. Par has flagged this dynamic in investor communications, describing Hawaii as a market where refining margins and regulatory credits, including federal RINs and California-style low-carbon fuel standards, can support standalone economics.

For the renewable plant specifically, colocation at Kapolei gives the project access to the refinery's tankage, utilities, dock infrastructure at Barbers Point, and existing distribution into the island market — the classic brownfield advantage that has driven similar renewable diesel conversions on the US West Coast.

What comes next?

The watch items from here:

• Ramp-up: commissioning and nameplate utilization are rarely simultaneous; first-quarter throughput will show whether the plant reaches design rates on schedule.
• Feedstock: renewable plants live or die on feedstock economics — used cooking oil, tallow and distillers corn oil pricing will determine unit margins.
• Offtake: disclosure of product offtake agreements, particularly any SAF commitments, would firm up the project's revenue picture.
• Par's next move in Hawaii: the company has studied further SAF capacity at Kapolei; a positive decision would follow this startup.

Editor's note: This item is based on the commissioning announcement as reported by Oil & Gas Journal. Capacity, feedstock and offtake details for the plant were not disclosed in the announcement and will be added as company confirmation becomes available.