How My Home Battery Really Performed (2 Years Later)
My January electric bill came to $336, even with solar on the roof and 20 kWh of home battery storage on the garage wall. After 12 months of utility bills and circuit-level data, the solar battery math got weird. The panels saved money. The battery cost about $207 a year, thanks to net metering…
Why The Biggest Battery Company Is Betting On Lithium Air
CATL, the world's biggest battery maker, just named its bet for what comes after solid-state batteries: lithium air. Headlines claim this battery stores as much energy as gasoline. This lithium air battery breathes, pulling oxygen straight from the surrounding air instead of packing in heavy metal…
Why the US Government Buried This Battery
Every summer, your building dumps a mountain of heat into the air just to stay cool. Every winter, it burns fuel to make all that heat right back. Now, what if you could catch the heat you’re throwing away in July, park it underground until January, and do the same thing with winter’s cold to get…
How Close Are We to Quantum Batteries?
Bigger batteries take longer to charge. Right? Researchers in Australia just tested one that flips that rule completely. The larger they built it, the faster it charged. It runs on quantum effects, and the very first version charged with light from a laser, no cord required. Scientists call the…
Why This Battery Is The Swiss Army Knife of Renewable Energy
How a Saltwater Battery Desalinates Seawater and Captures Carbon. Drop your phone in the ocean and you learn fast that seawater destroys batteries. So a seawater battery that actually runs on the stuff sounds backwards. Yet researchers in Korea have spent over a decade building one. This single syst
How Mars Technology Gave Us Cheap Energy Storage
Every year, some company claims they've cracked long-duration energy storage. And every year, we're still leaning on lithium-ion batteries that tap out after a few hours. You've heard the promises. You've seen the press releases. And you're probably as tired
How This Heat Pump Water Heater is Also a Battery
How This Heat Pump Water Heater is Also a Battery. Go to https://ground.news/undecided for an innovative way to stay fully informed on tech, energy, the climate and more. Save 40% on the Ground News unlimited access Vantage plan with my link. Heat pump water heaters have been around for over a decad
The Mystery Behind Donut Lab's "Impossible" Battery
Ever since Donut Lab announced their miracle solid-state battery, the internet has been absolutely certain about what it is. A capacitor. Vaporware. A scam. Except when you actually dig into those explanations, a lot of them start falling apart. Here's what Donut Lab is actually claiming: more energy
How 40-Ton Spinning Wheels Are Saving the Power Grid
When Spain's power grid failed on April 28th, 2025, it quickly became a very serious issue. Not only for the economic impacts, but life-or-death serious due to multiple, indirect deaths associated to the blackout. Emergency services, transportation, communication and other vital services were halted during this power outage.
Why Aluminum Batteries Could Beat Lithium
Your lights just flickered. Not for long. Just a split second. You probably didn't think much about it, but somewhere a battery may have just saved your city from a blackout. I’m not talking about keeping your phone charged or your EV running. These kinds of batteries
Are Sodium Batteries Already Dead?
NOTE: An earlier version of this story incorrectly associated the failure of Northvolt to their sodium ion battery production issues, but their challenges weren't chemistry specific. That section has been removed. I’ve got sodium batteries right here in my hands, but three sodium battery companies went bankrupt
Solid-State Batteries: Hype vs. Reality
If you've been following battery tech for the past decade, you've heard the solid state battery story before. Toyota promised them by 2025. Samsung said they were just around the corner. QuantumScape's stock soared on promises of revolutionary batteries. And yet here we are,