Top side diesel generator

The Department of the Navy Naval Sea Systems Command seeks rental and service of a topside diesel docking generator for Portsmouth Naval Shipyard in Kittery, Maine, with proposals due July 10, 2026 at 1500 EST. The procurement is a Total Small Business Set-Aside under NAICS 532490, with a $40 million size standard.

Place of performance is Kittery, Maine. The generator must be a 400 kVA (320 kW) minimum portable diesel unit with a 4-stroke diesel engine operating at 1800 RPM, 450–480 VAC 3-phase ungrounded output at 60 Hz, minimum 12-hour runtime at full rated load, EPA Tier 4 Final emissions compliance, NRTL approval, and capability to operate continuously in harsh outdoor conditions from −10 to +110 degrees Fahrenheit at 0 to 100 percent relative humidity. The generator enclosure must be weatherproof and sound-attenuated to 85 dBA at 23 feet, with lifting eyes and maximum dimensions of 210 inches length by 65 inches width and a weight of 19,000 pounds. Approved models are Caterpillar XQ 375 and XQ 425 (both Tier 4 Final with 420-gallon integrated tanks). All contractor personnel must be U.S. citizens requiring security clearance and badging for Portsmouth Naval Shipyard access. The base period of performance runs 9 weeks from December 1, 2026 through February 1, 2027, with an optional 4-week extension from February 2, 2027 through March 3, 2027. Pricing must include rental, all freight associated with delivery, and preventative maintenance. Vendors must submit load test results at 95 percent plus or minus 5 percent of maximum prime rating for one full hour upon delivery and provide two past performance references demonstrating relevant experience within the last five years. Evaluation criteria are technical acceptability (specifications compliance and delivery schedule), experience and past performance, and price on a best-value basis. All vendors must be registered in SAM.gov. Responses must be submitted via email with price quotes remaining firm for 60 days. Questions and answers posted July 8, 2026 are available in Attachment 3.