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Gemini North HBF Photo-Voltaic Array Power System Installation RFB

July 16th, 2015

As part of Gemini’s comprehensive energy savings initiative, Gemini North Telescope Facility (GN) seeks to install a 94.8 kW, net-energy metered photo-voltaic power system on the GN support building located at the Hilo Base Facility in Hilo, Hawaii. The proposed PV system consists 378 modules having a DC capacity of 260 W per module (98.28 kW DC total) and 4 decentralized inverters having a rated AC capacity of 24 kW AC per inverter (94.8 kW AC total). The system shall be configured in a 480 volt 3-phase arrangement.

Gemini plans to have work begin on the installation of the PV array in October or November 2015 and anticipates it will be completed in 3-4 weeks after building permits have been received. This project is federally funded and requires funder approval, which may require up to two months to obtain.

Request for Bid Documents:

PV Array RFB Selection EventsDate
Release RFP 17 July 2015
Intent to Submit Proposal 3 August 2015
Proposal Due 6 August 2015, 12:00 (noon) HST

RFQ Questions and Answers and Amendments
All questions must be emailed to Please do not contact a Gemini employee directly with questions. All questions and answers will be posted on the website. Please be sure to check back regularly for updates.
Any amendment to the request for proposal will be posted in reverse order of the date released.

Questions/Answers July 23, 2015

Q. Can the C-60 (Solar Power Systems) License class be included in the Minimum Qualifications for Proposers section of the RFP?
A. Yes, general contractor can be a C-60; however, contractor must comply with all licensing requirements of the County of Hawaii and HELCO, either by holding the necessary licenses or hiring subcontractors who hold the necessary licenses.

Q. Is Gemini/AURA open to utilizing a higher-wattage, more efficient solar module that would be more cost-effective and would meet the HELCO-approved DC wattage using fewer modules?
A. Yes, Contractor may use fewer, higher efficiency modules as long as the installed system is compliant with the NEM agreement.

Q. Does a bidder need to contact anybody for a site visit?
A. Yes, coordinate with Chas Cavedoni at

Gemini Observatory Participants