Rooftop solar companies have a new pitch as they seek to grab a piece of an emerging $50 billion market: Prepare for the worst

· The selling point for rooftop solar panels was once just about sourcing clean energy or saving money. Now it's also about resiliency. 
· Rooftop solar companies like Sunrun have seen boosts in battery sales in response to blackouts, and more customers are opting for solar-plus-storage in states that are prone to frequent...