Energy Storage Systems & Grid Battery Tech
- Exponential Industry
- Technology Area
- 28 Milestones
Systems that hold electricity or heat and return it later—home batteries, utility/C&I BESS, long-duration chemistries, and thermal stores. Lithium-ion (from the 1991 Sony cell) is the default for hours-scale storage; iron-air, flow, and thermal stacks target 10–100 hour duration. Operators include Tesla (Powerwall/Megapack), Fluence, CATL, and Form Energy; virtual power plants aggregate the distributed fleet.
Hidden Factory
Energy Storage Systems & Grid Battery Tech
MISO Order 2222 Phase 2
FERC Order 2222 explainer (timelines as of August 2024): MISO final implementation through Phase 2 by June 1, 2029 /FERC FERC Order No. 2222 Explainer: Facilitating Participation in Electricity Markets by Distributed Energy Resources/.
PJM Order 2222 energy and ancillary services DER aggregation
FERC Order 2222 explainer (timelines as of August 2024): PJM energy and ancillary services implementation February 1, 2028 /FERC FERC Order No. 2222 Explainer: Facilitating Participation in Electricity Markets by Distributed Energy Resources/.
MISO Order 2222 Phase 1
FERC Order 2222 explainer (timelines as of August 2024): MISO Phase 1 to be completed by June 1, 2027 /FERC FERC Order No. 2222 Explainer: Facilitating Participation in Electricity Markets by Distributed Energy Resources/.
PJM Order 2222 capacity-market DER aggregation
FERC Order 2222 explainer (timelines as of August 2024): PJM capacity-market implementation February 1, 2027, for the 2028/2029 capacity year /FERC FERC Order No. 2222 Explainer: Facilitating Participation in Electricity Markets by Distributed Energy Resources/.
Form Energy $750M Series G (2026)
Series G led by T. Rowe Price. New investors Sequoia, Janus Henderson, Franklin Templeton, PEAK6. Total equity raised over $2B. Morgan Stanley placement agent /Form Energy Form Energy Secures $750M in Series G Financing to Scale Iron-Air Battery Manufacturing and Accelerate Commercial Deployments/.
Base Power $1B Series D Funding Round
$1 billion Series D at $13 billion post-money valuation (announced ~Aug 3–6, 2026), co-led by Ribbit Capital, Addition, Valor Equity Partners, and JPMorganChase Strategic Investment Group; re-investors include Thrive, a16z, Lightspeed, Trust Ventures, CapitalG (Fortune). Valuation rose from $4B to $13B in less than a year (Fortune). Total capital raised over $2.5B. Announced with Base Core product launch /Business Wire / Base Power Base Power Announces $1B Series D and Launches Base Core, First-of-its-Kind Home Battery Built in the United States/ /Fortune Michael Dell's son built a $13B home battery business—and he's going on 30 years old/.
Base Core Manufacturing at Factory 1
In-house production of Base Core home batteries at Base Factory 1 in Austin (thousands of systems per month per COO Justin Lopas). Vertical integration of modules, inverters, and deployment logistics.
Antora Energy $550M Series C Funding Round
Oversubscribed $550M Series C (July 30, 2026) co-led by G2 Venture Partners and Eclipse; new investors include Ribbit Capital, Salesforce Ventures, Activate Capital, John Doerr, Westly Group, StepStone, Liberty Mutual Strategic Ventures; existing include Decarbonization Partners, Impact Science Ventures, Trust Ventures, BEV, Lowercarbon Capital.
Base Power Illinois Market Entry
First market outside Texas (2026-06-24): ARES retail supply + home battery in ComEd territory, at least 25% below ComEd default supply. Uses batteries to cut peak cost-to-serve. Governor statement cites the Clean and Reliable Grid Affordability Act. >20,000 Texas homes at launch. Not a documented PJM wholesale DER aggregation /Fortune Michael Dell's son built a $13B home battery business—and he's going on 30 years old/ /Base Power Base Power launches in Chicagoland as electricity costs surge/.
Lunar Energy NJBPU VPP comments (pursue PJM / New Jersey)
Lunar filed as a prospective third-party DER aggregator and Gridshare platform provider in NJBPU VPP/GSESP dockets, stating it is pursuing VPP and DERMS opportunities in PJM territory including the Mid-Atlantic /Lunar Energy / NJBPU Comments of Lunar Energy, Inc. — NJBPU VPP & GSESP RFI (Docket QO26030099)/.
Austin Energy–Base Power 40 MW residential storage agreement
Austin Energy contracted Base to deploy 40 MW of residential battery storage. The utility dispatches during peak demand to shave load and manage wholesale prices; Base installs and maintains /Austin Energy Austin Energy expands local battery storage to support reliable, affordable power/.
Octopus Energy × Lunar Energy PowerStore (ERCOT retail)
$0-down 30 kWh Lunar battery, $45/month, 8¢/kWh energy, grid services plus home backup. Official plan page: Houston and Dallas, deregulated ERCOT /Utility Dive Octopus Energy, Lunar Energy roll out battery-enabled electricity plans in Texas/ /Octopus Energy Octopus PowerStore: Smarter, fairer home battery power/.
GVEC–Base Power 50 MW expansion and ERCOT ADER qualification
GVEC and Base expanded a 2 MW residential-battery pilot to 50 MW across GVEC’s full South Central Texas territory. The Base aggregation qualified for ERCOT’s ADER pilot and can participate in wholesale energy and ancillary services /GVEC GVEC and Base Power Expand Partnership to Full Service Territory, Delivering 50 MW of Residential Battery Capacity/.
CoServ–Base Power 100 MW residential storage program
Base’s then-largest Texas utility collaboration: 100 MW of residentially sited batteries in CoServ’s North Texas territory. CoServ dispatches for peak shaving and energy arbitrage /CoServ CoServ and Base Power Launch 100 MW Residential Storage Program/.
El Paso Electric–Base Power DESPP (up to 10 MW)
EPE selected Base for its Residential Distributed Energy Storage Pilot Program targeting up to 10 MW ahead of the 2026 summer peak in EPE’s Texas service region (El Paso–Van Horn / Hatch–Las Cruces NM). This is not an ERCOT ADER program /El Paso Electric El Paso Electric and Base Power Launch Residential Distributed Energy Storage Program/.
Virtual Peaker–SMECO–ICF FlexHome Maryland pilot
Maryland residential DR pilot (Wi-Fi water heaters, up to 500 devices, three years) powered by Virtual Peaker VPP software. SMECO serves southern Maryland counties (PJM footprint); the PR names Maryland, not PJM /Virtual Peaker Virtual Peaker Partners with SMECO and ICF to Launch Maryland’s Innovative FlexHome Pilot Program/.
Form Energy $405M Series F (2024)
Series F led by T. Rowe Price; GE Vernova joined as investor and signed a manufacturing/deployment MOU. Total funds raised over $1.2B /Form Energy Form Energy Secures $405M in Series F Financing to Expand Iron-Air Battery Business and Operations/.
Form Energy – GE Vernova manufacturing MOU (2024)
MOU for strategic collaboration on manufacturing ramp and commercial deployments of iron-air systems /Form Energy Form Energy Secures $405M in Series F Financing to Expand Iron-Air Battery Business and Operations/.
Virtual Peaker–MidSouth Electric ERCOT+MISO DERMS
MidSouth adopted Virtual Peaker’s DERMS to run its smart-thermostat demand-response program across both ERCOT and MISO /Virtual Peaker MidSouth Electric Cooperative Adopts Virtual Peaker Grid-Edge Technology to Simplify Load Management Across ERCOT and MISO/.
Swell Energy shutdown of Hawaiian Electric VPP
Hawaiian Electric said Swell Energy had closed and stopped supporting the Home Battery Rewards Program (~1,200 customers on Oahu, Maui, Hawaii Island). Swell was contracted in 2021 to aggregate home batteries as a VPP /Hawaiian Electric Hawaiian Electric will pay customers with battery systems upfront incentives owed by insolvent third-party provider/.
Form Energy $450M Series E (2022)
Series E led by TPG Rise; GIC and CPP Investments joined /Form Energy Form Energy Announces $450M Series E Financing/.
Form Energy $240M Series D (2021)
Series D led by ArcelorMittal XCarb; TPG Rise participated. Total funds raised over $360M /Form Energy Form Energy Closes Series D to Accelerate Market Entry/.
Form Energy $76M Series C (2020)
Series C led by Coatue; new investors EIP, NGP ETP III, and Temasek /Form Energy Form Energy Closes Series C to Accelerate Development/.
Form Energy $40M Series B (2019)
Series B led by Eni Next; Capricorn joined; BEV, Prelude, The Engine, and Macquarie participated /Form Energy Form Energy closes Series B to enable the transition to a clean grid/.
Tesla unveils Powerwall and Tesla Energy
Elon Musk unveiled Tesla Energy and the Powerwall home battery at $3,000 (7 kWh) / $3,500 (10 kWh); pre-orders open; first shipments 'late summer' /TechCrunch Tesla’s $3,000 Powerwall Will Let Households Run Entirely On Solar Energy/.
Sony introduces commercial lithium-ion battery
Sony introduced rechargeable Li-ion in 1991 after engineering the Yoshino/Goodenough chemistry; first used in camcorders, then phones. This follows previous failed commercialization efforts from Exxon (1972) and Oxford LCO (1980) /IEEE Spectrum Who Really Invented the Rechargeable Lithium-Ion Battery?/.
Goodenough lithium-cobalt-oxide cathode
Goodenough and Mizushima at Oxford replace TiS2 with LiCoO2 by 1980, raising cell voltage to 4 V /IEEE Spectrum Who Really Invented the Rechargeable Lithium-Ion Battery?/.
Whittingham intercalation cell at Exxon
Stanley Whittingham develops the first lithium intercalation battery at Exxon in 1972 (TiS2 cathode) /IEEE Spectrum Who Really Invented the Rechargeable Lithium-Ion Battery?/.