For those who run a solar business or work in solar, what are your three biggest challenges in growing your company?

See title. For context, I am a young student who wants to create solutions for solar companies to grow faster. I want to develop a service or solution that solar companies truly need. Therefore, I am starting by trying to understand what people's pain points are.

Please give me your top 3 challenges, or more if you're willing.

Thanks in advance!