CART ON A HOT TIN ROOF: All Fired Up: Walmart Sues Tesla.

No, Walmart was not using fleets of pricey electric vehicles to get 56-cents-a-pound bananas to budget-conscious shoppers; rather, the chain had outfitted a slew of its stores with rooftop solar panels assembled and managed by Tesla subsidiary SolarCity.

Now Walmart’s feeling burned. Literally.

Following rooftop blazes at at least seven stores and a recent investigation, the shopping giant filed a lawsuit against Tesla on Tuesday, alleging the company “engaged in widespread, systemic negligence and had failed to abide by prudent industry practices in installing, operating, and maintaining its solar systems.”

Walmart’s relationship with SolarCity goes back a number of years; a trio of earlier fires in 2012, 2016, and 2017 were brushed off as random flukes. Then the fires began occurring with greater frequency.

That’s not good.