Tesla Just Quietly Killed Off One Of Its Newest Products

Tesla has retooled its strategy for selling people with solar panels on batteries to store excess energy before the company even sold its first units.

The electric automaker unveiled a new suite of batteries last May, called Powerwalls, for homes and businesses. However, it quietly dropped its 10 kilowatt-hour device, the larger of its two residential batteries. Originally marketed as a backup power supply in case of grid-wide blackout, the $3,500 unit wasn't as affordable as other alternatives, especially given that solar panels are sold separately.