Investment-grade notes now sit behind operating batteries in Texas

Victoria Shinder20 September 2026, 22:482 min read

Jupiter Power announced on 16 September that it has closed US$1.4 billion of financing across four separate transactions, covering ten battery projects in Texas and Michigan that add up to 1,500 MW / 3,600 MWh — a fleet averaging 2.4 hours of duration. The deals themselves closed between April and July; cumulative financing since the company started now passes US$3 billion. Details are at https://www.energy-storage.news/jupiter-power-closes-us1-4-billion-financing-for-10-us-bess-projects-totalling-3-8gwh/.

The four:

• US$536 million, July, the company's largest — construction term loan, tax equity bridge and letters of credit for three Texas projects (Tidwell Prairie II, Bee Branch, Barton Branch). Lenders: HSBC Bank US and SMBC.
• US$281 million, June — a US private placement of senior secured notes rated BBB− by KBRA, backed by three projects that are already operating: Tidwell Prairie I and St Gall II in Texas, Tibbits in Michigan. Bought by AB CarVal and Nuveen.
• US$294 million, May — two Michigan projects, Grand Basin and Voyager I, connected in MISO. ING Capital and Société Générale.
• US$258 million, April — Callisto II and Pamela Heights I in Harris County, Texas. Société Générale and MUFG as coordinating lead arrangers.

What it means

The rating is the news, not the billion. A BBB− private placement secured on three operating batteries means the cash flow of a merchant storage asset has been underwritten as investment grade by a rating agency and bought by institutional investors. Five years ago storage revenue was treated as a trading position with equipment attached. Something in that assessment has changed, and it changes what a battery costs to build long before cell prices do.

Note which projects carry the notes. The private placement sits behind operating plants; construction risk was financed separately, through term loans and tax equity bridges. That split is the mechanism: banks take the build, the bond market takes the operating cash flow, and the developer recycles equity into the next site. It is how wind and solar became ordinary, and it is arriving for storage roughly a decade later.

And 2.4 hours is the shape of the American fleet. These are not long-duration assets displacing generation; they are intraday assets paid for peak capacity, ancillary services and price spread — which is what ERCOT and MISO currently pay for. Duration follows the market design, not the technology, and the financing arrives only once the market design has held still long enough to be modelled.