CoServ and Base Power grow Texas home battery program to 450 MW

CoServ, the North Texas electric cooperative, is expanding its home battery program with Base Power to 450 MW, the two companies said on November 10, 2026. That is four and a half times the 100 MW announced on March 6. Base has installed 75 MW of batteries at CoServ members' homes since the program launched in March, and the fleet has grown by about 10 MW a month.

Each battery backs up the whole home during outages and joins a networked fleet that CoServ dispatches during peak demand. Base installs and maintains every unit; the co-op controls when the fleet charges and discharges, which makes it a virtual power plant with the utility holding the controls. Founding CoServ members pay $345 to install a 39.2 kWh Base Core, down from $695, and the $19 monthly membership fee is waived for the life of the battery, per Base's program page.

Spread across homes, 450 MW is still a small share of the membership. By our arithmetic, 450 MW is about 22,500 batteries if every home takes one of the 20 kW units listed on Base's utility page (MW here is power, not stored energy), under 8% of CoServ's more than 300,000 electric members.

Speed is the pitch. The companies say the fleet's growth of about 10 MW a month is "much faster than alternative resources can be built," letting CoServ "add reliable capacity quickly while offering affordable resiliency to its members." Base's own utility page is quicker still on paper, listing 3-6 months to deploy 100 MW; at CoServ, where every battery goes on a member's home, 75 MW took from March to November. At that rate the remaining 375 MW is a little over three years of installs, by our arithmetic, and the release sets no date for reaching 450 MW.

The expansion follows Base's first utility partnership outside Texas, a 50 MW program with Central Georgia EMC, and a strategic partnership with Walmart to offer Base at select Walmart and Sam's Club stores in Texas. Our US virtual power plants page tracks fleets like this one.