Even as its solar business declined in step with its overall earnings, Tesla is bullish on the prospects for the energy side of its business over the course of the year.

The energy business is an unheralded part of Tesla — overshadowed by its headline-grabbing (and much larger) auto exploits — that chief executive Elon Musk thinks will generate an increasing share of revenue for the company over time.

Revenues from its solar power and energy storage business fell by 13 percent from the fourth quarter 2018 and 21 percent from a year ago period, down to $324.7 million from $371.5 million in the fourth quarter of 2018 and $410 million in the year ago quarter, according to techcrunch.com.

Solar energy deployments fell from 73 megawatts to 47 megawatts from the fourth to the first quarter, the company said.

The company actually introduced a new financing and purchasing model for solar installations in the second quarter — saying in its shareholder letter that residential solar customers can buy directly from the Tesla website, in standardized capacity increments.

“We aim to put customers in a position of cash generation after deployment with only a $99 deposit upfront. That way, there should be no reason for anyone not to have solar generation on their roof,” Musk and chief financial officer Zachary Kirkhorn wrote in the shareholder letter.