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Base Power raised a $1 billion Series D on 2026-08-03 at a $13 billion valuation…

Brief

Base Power, founded in 2023 by Justin Lopas and Zach Dell, raised $1B Series D on 2026-08-03 at a $13B valuation and launched Base Core, a 40 kWh/20 kW home battery built in Austin. The company emphasizes US/Mexico supply chains, vertical integration, grid-focused, edge-deployed storage (fleet >500 MWh, 200+ MW utility programs), and rapid scaling to 4,000 units/week.

Why it matters

Base Power raised a $1 billion Series D on 2026-08-03 at a $13 billion valuation, bringing total funding to $2.5B+; the round was led by Ribbit, Addition, Valor Equity Partners and JPMorgan Strategic Investment Group with participation from Altimeter, D1, Sands, Coatue, Layer Global, and Energy Impact Partners.

Key details

  • Base Core is a US-made, vertically integrated home battery: 40 kWh capacity with a 20 kW inverter (≈3× a conventional home battery), whole-home backup installable in under an hour; Base reports a fleet past 500 MWh, 100+ installs/day, 200+ MW of utility partnerships (El Paso Electric, Austin Energy, CoServ), and a Factory 1 targeting 4,000 units/week.
  • Co‑founder Justin Lopas says most home batteries sell to wealthy solar customers and are small/wall-mounted; Base’s strategy is grid-focused: modular, edge-deployed battery “pieces” (not large container batteries), installed around data centers to offset interconnection load and using vertical integration to cut cost, reduce lead times, and iterate hardware quickly.
Source evidence

Base Power Co-Founder Justin Lopas (@JLopas) says most home battery products are sold to "wealthy people" and typically paired with solar, but Base is focused on building batteries to support the grid:

"If you look at other competitive battery products that are sold mostly to wealthy people at very high cost, they're small, typically wall-mounted, take a long time to install, and aren't focused on supporting the grid."

"This is a totally different play on grid batteries. Instead of big shipping container batteries, we chopped it up into a bunch of little pieces and we put it at the edge of the grid. That's what this is. This is a grid-focused battery."

Video

Molly O’Shea (@MollySOShea)

BREAKING: Base Power Raises $1 Billion Series D, Hitting $13 Billion Valuation & Launching "Base Core"

First-of-its-Kind Home Battery Built in the USA

$2.5B+ in total funding to date

Co-Founder Justin Lopas (@JLopas) gives us a Factory 1 tour in Austin, Texas

Founded in 2023, by Justin & Zach Dell (@ZachBDell). @basepowerco designs, manufactures, & installs home batteries that back up the house & support the grid

Just 10 months after their Series C, this round was led by Micky Malka's Ribbit, Addition, Valor Equity Partners, & JPMorganChase's Strategic Investment Group, with participation from Altimeter, D1 Capital Partners, Sands Capital, Coatue, Layer Global, & Energy Impact Partners

Base’s major existing investors are re-investing, including Thrive Capital, a16z, Lightspeed, Trust Ventures, CapitalG, & more

"It is so critical to bring manufacturing back to the US, especially for critical infrastructure."

"It's a vertical integration thesis. We can cut down cost. We can reduce lead time. We can change the hardware much more quickly."

We Cover:
› Base Core, 40 kWh with a 20 kW inverter, roughly 3X a conventional home battery
› Whole home backup, installed in under an hour
› Fleet past 500 MWh, over 100 installs a day
› 200+ MW of utility partnerships with El Paso Electric, Austin Energy, & CoServ
› Factory 1 built in 6 months, targeting 4,000 units a week by year end
› 100% US and Mexico supply chain
› Batteries installed around data centers to offset interconnection load

𝐓𝐈𝐌𝐄𝐒𝐓𝐀𝐌𝐏𝐒
(00:00) Justin Lopas, Co-Founder & COO, Base Power
(01:06) Base Power raises $1B Series D
(02:26) Meet Base Core
(05:42) Demo: Whole-home backup in action
(07:06) How Base Power's business model works
(08:55) Inside Base Power's Factory
(11:28) Why Base Core is 3x larger than other home batteries
(12:05) Inside the manufacturing line
(13:23) Can humanoid robots build batteries?
(14:13) Why Base Power manufactures its own batteries
(15:47) Inside the robotic assembly line
(18:09) How lithium-ion batteries work
(21:40) Scaling production to 4,000 units a week
(22:33) Installing 100+ systems a day
(23:03) COO or Electrician?
(23:53) From oil rigs to Base Power

Video

— https://nitter.net/MollySOShea/status/2084270564873490686#m