Solar Proponent Reaches $10 Million Interconnection Agreement Milestone

  • Solar Proponent recently signed an interconnection agreement and posted $10 million in initial security to advance the Lunis Creek Solar Project toward construction in Jackson County, Texas.

AUSTIN, Texas–(BUSINESS WIRE)–Solar Proponent LLC (“SolarPro”), a utility-scale solar-plus-storage (“Solar+Storage”) developer based in Austin and focused on the ERCOT market, is pleased to announce it has made significant advances in its 6 GW Solar+Storage development portfolio, with the aim of enabling several large plants to be fully operational by late 2023 to early 2024.

In October, SolarPro signed an interconnection agreement and posted $10 million security on the 345 KV portion of its Lunis Creek Solar Project in Jackson County. When expansion is complete and combined with its adjacent 138 KV project, the facility is expected to produce approximately 1 GWdc of energy.

“We are continuing to expand our top-tier Solar+Storage portfolio in Texas and partner with local communities in the energy transition,” said Solar Proponent Chief Executive Officer Cassandra Rinaldo. Chief Development Officer Jeff Sabins added, “By reaching this interconnection agreement milestone we have secured 480 MWac of capacity on the South Texas Project – Angstrom 345 KV transmission line and are in process of increasing this to 600 MWac.”

About Solar Proponent (“SolarPro”)

SolarPro’s mission is to leverage the enormous potential of solar power to create zero-carbon electricity infrastructure. With decades of combined experience in the energy sector, the Solar Proponent team is focused on building value for investors, communities, and landowners through responsibly developed solar generation projects. SolarPro is supported by growth capital from EnCap Energy Transition Fund I, a $1.2 billion fund. Yorktown Partners, Mercuria Energy and SolarPro management have also invested. For more information, visit


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