Jupiter Power closes $1.4bn battery financing programme

Jupiter Power has closed $1.4 billion of financing across four transactions supporting ten utility-scale battery storage projects in Texas and Michigan with combined capacity of 1,500MW/3,600MWh.

The transactions closed between April and July 2026 and cover projects at different stages of delivery and operation. The financing includes construction debt, tax-equity bridge loans, letters of credit and an investment-grade US private placement rather than applying one capital structure across the entire portfolio.

The largest individual package closed in July, when Jupiter secured a $536 million senior secured facility for Tidwell Prairie II, Bee Branch and Barton Branch in Texas. The transaction consists of a construction term loan, tax-equity bridge loan and letter-of-credit facilities, with HSBC Bank USA and SMBC acting as lenders.

A month earlier, Jupiter completed a $281 million senior secured note issuance and letter-of-credit facility through a US private placement. That financing is collateralised by three operating batteries: Tidwell Prairie I and St. Gall II in Texas and Tibbits in Michigan.

The private placement carries a BBB- rating from Kroll Bond Rating Agency, with AB CarVal and Nuveen as note purchasers and Barclays and HSBC Securities acting as placement agents. Using operating projects as collateral distinguishes the transaction from construction debt attached to assets that have yet to enter commercial service.

In May, Jupiter closed a $294 million financing package for Grand Basin and Voyager I in Michigan. ING Capital and Société Générale provided construction term debt, a tax-equity bridge loan and letters of credit for the two projects, which are interconnected within the Midcontinent Independent System Operator market.

The fourth financing closed in April. Société Générale and MUFG provided a $258 million senior secured facility for Callisto II and Pamela Heights I in Harris County, Texas, again combining construction debt with tax-equity bridge and letter-of-credit facilities.

Together, the four packages illustrate how battery financing changes as projects progress. Development-stage assets need capital for equipment procurement and construction, while operating batteries can support longer-term debt structures once construction and commissioning risk have fallen away.

The physical cost profile of a battery project makes that financing sequence important. Cells, battery enclosures, power conversion systems, transformers, switchgear, controls, fire-protection equipment, civil works and grid infrastructure all require substantial expenditure before a project begins producing operating revenue.

A gigawatt-scale development pipeline therefore does not represent usable grid capacity until financing, procurement and construction have progressed far enough to put equipment on site. Capital availability is one of the steps that converts an interconnection position and development rights into an energised asset.

The ten projects covered by the four transactions total 1.5GW of power and 3.6GWh of energy capacity. Considered together, those headline figures equate to an average duration of 2.4 hours, although individual projects have different technical configurations and commercial arrangements.

Those differences are relevant because Jupiter operates in both ERCOT and MISO. Texas has developed a large battery fleet exposed heavily to wholesale energy spreads and ancillary-service markets, while Michigan’s storage build-out includes more long-term utility contracting.

The resulting portfolio does not depend on a single revenue model. Assets with contracted capacity or offtake can reduce part of their exposure to electricity-market volatility, while merchant projects rely more heavily on trading, forecasting and dispatch optimisation to determine when charging and discharging produces the highest value.

Jupiter combines project development with trading, analytics and operational control, allowing battery dispatch to respond to market prices and grid conditions once equipment is commissioned. That capability becomes increasingly significant as battery revenue moves between energy, capacity and ancillary-service opportunities over the life of a project.

The company’s current portfolio is larger than the figure used during the earlier drafting pass. Jupiter now reports 5.6GW/19.7GWh of projects operating, under construction or under contract, with another 23GW in development across major US power markets.

Those figures still cover assets with different levels of delivery certainty. A project under contract or construction is materially closer to operation than an early development opportunity, so the $1.4 billion financing announcement provides a more concrete measure of near-term deployment than the development pipeline alone.

Three operating assets have progressed far enough to support the private placement, while the construction financings allocate capital to another group of named projects in Texas and Michigan. Jupiter says the four transactions bring its cumulative financing since inception to more than $3 billion.

Geographic diversity also changes the operating exposure of the portfolio. ERCOT and MISO have different market structures, resource mixes, congestion patterns and capacity requirements, meaning battery performance depends on local system conditions rather than simply the common characteristics of lithium-ion storage.

Each financed project must still move through its own engineering programme. Equipment manufacture, site construction, interconnection works, protection testing, communications, control-system integration and commissioning remain project-specific despite being financed in grouped transactions.

The $1.4 billion programme therefore marks a capital milestone rather than the completion of 3.6GWh of new storage. Its significance will be measured as the construction-stage projects reach energisation and join the operating assets already capable of supplying flexibility across Texas and Michigan.