California homeowner expected Powerwall to cash in on peak rates, then learned why it holds charge

California homeowner expected Powerwall to cash in on peak rates, then learned why it holds charge

A California homeowner thought a Powerwall would automatically sell stored electricity back to the grid when evening rates spiked above $0.40 per kilowatt-hour. Instead, the battery kept most of its charge. That small mystery points to a bigger lesson for anyone trying to cut utility costs under PG&E's NEM 3.0 rules: The most profitable move is not always exporting power. What's happening? In a Reddit post, a Northern California homeowner who sa…