Comment Re:Headline trifecta (Score 4, Interesting) 81
You can't use car batteries in your home. They make toxic fumes. You'd have to use marine-quality sealed batteries. And at the scale for your home, you're talking real money, usually around $5000-7500 in just batteries. They're heavy, bulky and take up a lot of room. Just think of putting 20-30 car batteries in your home. Plus you'll need to replace all of them every 3 years or so. If they can make a battery pack for $10,000 that's a fifth the size, lasts 10-15 years, and comes warrantied for use in specifically that method... that's a really big win.