Branch Energy raises $33M to deliver AI power with Arc batteries in weeks

Branch Energy said it closed a $33 million Series B led by Piva Capital and Clean Energy Ventures. The Houston company sells Arc — a self-contained battery “grid in a box” about the size of a parking space — meant to store and deliver electricity on-site for AI data centers and other power-hungry sites faster than building new plants and transmission.

Same-day HARDWARE primary that a Houston battery startup closed a Piva- and Clean Energy Ventures-led $33 million Series B to sell parking-space Arc systems as a faster path to AI and data-center power than multi-year plant and wire builds, with expansion toward Illinois and PJM markets.

Branch Energy, a Houston distributed-energy company, announced a $33 million Series B via GlobeNewswire on 15 Sep 2026. Series B is a later venture round — after seed and Series A, not a first check. Distributed energy here means power gear placed at the customer’s site instead of a distant plant. The release is datelined HOUSTON, Sept. 15, 2026, and timed 2026-09-15T13:30:00Z on GlobeNewswire. That company PRIMARY via GlobeNewswire is the filing event. These are company claims. This desk did not see the term sheet.

The round was led by Piva Capital and Clean Energy Ventures, the company said, with participation from Active Impact Investments and Whitecap Venture Partners, plus existing investors Prelude Ventures, Zero Infinity Partners, and Inovia Capital. File the $33 million figure, the two leads, and those named participants as Branch Energy’s. This desk is not inventing a valuation, an ownership percentage, or a check size. None was printed.

Problem framing, as the same wire has it: electricity for AI data centers and electrification — electric vehicles, HVAC (heating, ventilation, and air conditioning), and advanced manufacturing — is rising faster than the aging grid can handle. The traditional answer is new plants and the wires to carry their output, which takes years. The company says generation projects completed in the United States now wait a median of over five years from request to connection. A median is the middle value in a list, not the average. File that constraint and that five-year wait as Branch Energy’s. This desk did not audit interconnection queues.

Product, still company: Arc, a proprietary self-contained “grid in a box.” Everything needed to store and deliver electricity, the company says, fits in one container about the size of a parking space — an industrial-grade battery, grid-connection gear, cooling, autonomous controls, and cloud software Branch uses to run it safely. File Arc and that parking-space package as Branch Energy’s. This desk did not open a container.

Where it sits and how it ships, company: Branch installs Arc on-site at commercial buildings — warehouses, hotels, factories, retail. The systems are delivered by flatbed truck and, the company says, can be installed in two days. Behind-the-meter here means the gear sits on the customer’s side of the existing utility meter, not at a distant plant. File the site list, the flatbed delivery, and the two-day install as Branch Energy’s. This desk did not time an install.

Business model, still the company’s — attribute, do not independently certify savings: the host avoids an upfront payment; Branch handles permitting, installation, insurance, and operations; Branch becomes the retail electricity provider for the host business and says it locks in lower rates by optimizing when the battery charges and discharges. The host provides a parking-space plot and, the company says, gets guaranteed savings on the energy bill plus backup power during outages. Branch says its own revenue comes from the electricity market — sending stored power to the grid or to contracted offtakers such as hyperscalers, and shifting energy from cheap night hours to expensive evening peaks. A hyperscaler is a very large cloud or data-center operator. File that no-upfront / retailer / savings-and-backup pitch, and that hyperscaler-offtaker path, as Branch Energy’s. This desk did not review a customer bill, and it is not treating “hyperscalers” as named signed contracts. None were named.

Named voice on the release: Alex Ince-Cushman, co-founder and chief executive, arguing hyperscalers need power now and that Branch can work on the timeline of a delivery, not a construction project. File the name and title as the company’s. His quotes are color only and stay in Sources.

Expansion, company: services expanding from Texas to Illinois among other markets. The company cites PJM — the regional grid operator covering Illinois and nearby states — as having opened a path for large energy users such as data centers to connect sooner when they bring their own capacity. Branch says it deploys Arc batteries on unused parking lots, behind meters that already exist, without new land, permits, or transmission lines. File that Texas-to-Illinois expansion, the PJM path, and that no-new-wires line as Branch Energy’s. This desk did not read a PJM tariff order.

Company market color on that PJM path, still the wire’s: PJM’s territory holds roughly 1.2 million commercial buildings and covers 20% of U.S. national electricity demand. File 1.2 million and 20% as Branch Energy’s. This desk did not recount those buildings.

Named investor voices on the same release: Lee Larson, principal at Piva Capital; and Daniel Goldman, co-founder and managing partner at Clean Energy Ventures. File the names and titles as theirs, via Branch Energy. Their quotes are color only and stay in Sources. This is not investment advice.

Forward-looking fleet claim, company: building toward tens of thousands of Arcs across the United States under long-term capacity agreements. The company says a fleet that size “carries billions of dollars of annual revenue.” File that fleet goal and that billions line as Branch Energy’s aspiration — not verified financials, not a booked backlog this desk can count, and not a valuation.

Plain English for the rest of the card: Series B = later venture funding after seed and Series A. Behind-the-meter = power gear on the customer’s site, not a distant plant. PJM = the regional grid operator covering Illinois and nearby states. Arc = Branch’s parking-space container of battery, cooling, controls, and software. Hyperscaler = a very large cloud or data-center operator. HVAC = heating, ventilation, and air conditioning.

PRIMARY here: Branch Energy’s 15 Sep 2026 GlobeNewswire company release — Tier A company source, the original record. The company site is product-home context, not a second originating newsroom. The $33 million Series B, the Piva Capital and Clean Energy Ventures leads, Active Impact Investments / Whitecap Venture Partners / Prelude Ventures / Zero Infinity Partners / Inovia Capital, the Arc parking-space “grid in a box,” the two-day install, the no-upfront / retail-provider / guaranteed-savings pitch, the Texas-to-Illinois and PJM expansion, the 1.2 million / 20% PJM color, the Ince-Cushman / Larson / Goldman names, the five-year interconnection wait, and the tens-of-thousands / billions-revenue fleet line are company-attributed. Guaranteed savings, two-day installs, the no-new-wires line, PJM counts, and the billions-revenue aspiration stay company-attributed. NOT claimed: a valuation, named hyperscaler customer contracts, independent megawatt totals, independently verified savings, that this desk visited a site or saw a term sheet, a stock tip, or investment advice. Distinct from the already-filed euclyd-200m-series-a, alphapai-50m-series-b, flam-40m-series-b, and exein-270m-physical-ai.