Quantum Fuel Systems announced it has delivered its initial 21-inch diameter Q-Lite back-of-cab compressed natural gas (CNG) tank systems that were developed under a commercial alliance with Mainstay Fuel Technologies announced in September.

The systems incorporate Quantum's storage tanks and are being delivered directly to a major transportation company and to fleet customers through Quantum's relationship with Kenworth and its dealership network. The systems are based on Mainstay's existing fuel module designs and incorporate three of Quantum's 21-inch Q-Lite tanks, which provide significant weight savings over competing 21-inch tank diameter based systems, according to Quantum.

Under the Quantum-Mainstay alliance, each party can offer 21-inch back-of-cab fuel storage systems based on its respective customer needs, and will jointly collaborate on business development activities and new designs for 21-inch tank diameter systems.

Quantum  specializes in natural gas storage systems, integration, and vehicle system technologies for trucks.