Residential Battery Energy Storage & Home Batteries
- Exponential Industry
- Technology Area
- 9 Milestones
Wall- or floor-mounted lithium home batteries that store rooftop solar or cheap off-peak power for backup and grid services. Typical packs are 7–30 kWh at 400 V, paired with a hybrid inverter or a dedicated gateway; they sit behind the meter, unlike utility BESS. Tesla Powerwall (2015) created the mass-market category; later vendors include Enphase, Lunar Energy, Sonnen, and Base Power.
Hidden Factory
Residential Battery Energy Storage & Home Batteries
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.
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/ /Base Power/.
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/.
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/.
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/.
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/.
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/.
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/.
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/.