Principal Solar, Inc. announced that it has executed a definitive research and development agreement with Triad Pro Innovators, Inc. The Agreement establishes a relationship for cooperative research and development between Principal and Triad Pro for the purpose of creating new power storage solutions for the Electric Vehicle (EV) industry. Potential applications for solutions created under the agreement include use in Principal's client and portfolio company products, specifically its fleet-focused heavy electric vehicle conversions and hybrid-electric powertrains, which require unique capabilities supporting continuous operation with long charging cycles – capabilities underserved by existing battery technologies. The major advantage of Triad Pro's eCell lies in its solid-state technology, which allows electric vehicles to accept a charge at any rate (limited only by network supply), thereby enabling ultra-rapid charge cycles that increase productivity by keeping heavy electric vehicles on the road.

Another key eCell advantage is the absence of typical battery chemical solutions that degrade with repeated charge-discharge cycles, giving the Triad Pro eCell a lifespan of over 30,000 cycles, thereby greatly reducing ongoing maintenance costs for heavy EV owners.