Base Core

Base is an energy company building a grid for the future so Americans can enjoy affordable, reliable power. We design, build, install, and operate home batteries that back up your home, save your money, and support the grid.

Base Core is our next generation home battery, designed from the ground up to support the grid and now in production at Base Factory 1 in Austin. It backs up your whole home, switches over seamlessly when the grid drops, and can withstand conditions from Texas summers and Chicago winters.

Base Core holds 39.2 kWh of energy, which is ~3x the size of typical batteries. How long it lasts depends on how much power you use. A battery stores a fixed amount of energy, so running high-usage devices like A/C drains it faster, just like a bigger hose empties a bucket more quickly.

At reduced usage, a Base Core can back you up for up to 36 hours. For context, 97% of outages in Texas are less than 2.5 hours long.

In the case of an extended outage, Core has a built-in generator port that lets you recharge it from a standard portable generator, so you stay powered as long as you have fuel. The Base app shows a real-time estimate of your remaining backup time, at both your current usage and reduced usage.

You don’t take on the risk of owning or maintaining the hardware. Base retains ownership of the battery for the full term of your agreement, which means we warranty it and handle all service and maintenance, typically within days and at no cost to you. Base covers 100% of maintenance for manufacturing defects, installation defects, and other damage outside your control.

Base offers a significantly less expensive backup battery solution compared to alternatives due to the unique shared business model: Base earns income from the power grid instead of homeowners. This business model allows you to get energy backup without paying tens of thousands of dollars for a traditional generator. An expensive solar system and solar battery also requires a massive upfront investment which often can take longer than the lifespan of the system to pay back. With Base, you pay just a one-time installation cost that pays the team of electricians to install the battery on your home. Base offers fair, fixed rates and reliable backup power. Since revenue comes from the grid, not customers, Base avoids hidden fees and surprise rate hikes. Your agreement also legally guarantees your rates stay below the market average.

Base operates differently from traditional power companies. Instead of profiting directly from customers, Base earns revenue by using grid-balancing software paired with outage prediction technology. This approach optimizes Base Core for both grid stability and outage protection. When the grid is functioning, Base uses its batteries to support grid balancing. This strengthens the grid's resilience and generates income for Base. By leveraging its network of batteries for grid balancing, Base maintains low rates for members while remaining profitable.

Core is certified under UL 1973, UL 9540, UL 991, UL 1998, UL 1741, IEEE 1547-2003. UL certification is the gold standard for electrical system safety in home appliances, including rigorous fire safety standards.

Core uses lithium iron phosphate (LFP) chemistry, one of the safest battery types available. It’s more stable under high temperatures and far less likely to overheat than standard EV battery chemistries.

Beyond certifications, Core went through extensive test programs: IP67 submersion testing (rated to 3 feet), IPX9K high-pressure water testing, and internal flash-flood testing. It operates from -22 to 122 °F, built for the hottest Texas summers and the coldest Chicago winters. Every installation is performed by certified, bonded, insured, and licensed electricians under Base’s Texas master electrician (license #476697), or licensed by local regulatory agencies.