The plan is to sell them at 38 percent less than the US average.
Tesla plans to sell its solar panels at a price that’s 38 percent lower than the national average in an attempt to halt the decline of its solar business. The New York Times notes that the head of Tesla’s solar department, Sanjay Shah, wants to sell panels for between $1.75 and $1.99 a watt, compared to the national average of $2.85.

Source:
https://www.theverge.com/2019/4/30/18523750/tesla-solar-panels-price-slash-decline-sales-roof