Net Present Value isn't quite the right thing to look at. Inflation-adjusted energy prices have been rising over time, so the thing these batteries are projected to deliver (fixed impact on that electricity grid) increases in value over time even after the NPV discount. The more important component is the "risk-adjusted" NPV, which may or may not make tech like this effectively worthless.
alt Hacker News
Net Present Value isn't quite the right thing to look at. Inflation-adjusted energy prices have been rising over time, so the thing these batteries are projected to deliver (fixed impact on that electricity grid) increases in value over time even after the NPV discount. The more important component is the "risk-adjusted" NPV, which may or may not make tech like this effectively worthless.