# Jupiter Power Secures $1.4 Billion Financing Package for 1,500 MW / 3,600 MWh BESS Portfolio

> Backed by senior secured facilities and private placements, the multi-asset financing supports 10 utility-scale battery energy storage systems across ERCOT (Texas) and MISO (Michigan), addressing extreme weather grid volatility.

- **Publish Date:** 2026-09-16
- **Category:** energy-storage
- **Reading Time:** 4 min
- **Original Source Citation:** [Jupiter Power & Mercom Capital Group](https://www.jupiterpower.com)
- **Tags:** BESS, Energy Storage, Project Finance, ERCOT, MISO, Grid Reliability
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## Scaling 1,500 MW / 3,600 MWh Storage Across ERCOT and MISO

Energy storage developer and operator Jupiter Power LLC has closed $1.4 billion in new financing across four transactions, bringing its cumulative capital raised since inception to over $3 billion. The capital supports the deployment of 10 utility-scale battery energy storage systems (BESS) totaling 1,500 MW / 3,600 MWh of flexible capacity across the ERCOT and MISO electricity markets.

A core milestone of the transaction series was a $536 million senior secured debt and tax equity bridge facility dedicated to three major Texas projects: Tidwell Prairie II, Bee Branch, and Barton Branch, which are entering commercial operation.

## Grid-Forming Inverters and Resiliency Against Weather Extremes

The installations utilize high-density lithium-iron-phosphate (LFP) chemistries paired with advanced grid-forming inverters capable of instantaneous sub-second active power injection.

Operating in the ERCOT territory, where summer heatwaves push wholesale reserve margins to critical thresholds, and MISO, where winter freeze events challenge thermal generation, these multi-hour BESS assets act as virtual peakers and dynamic stability anchors for transmission utilities.

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