As the article notes, module technology and module costs are no longer the most significant barrier to solar adoption---so if you're in software, the greatest opportunities to have significant impact are probably in tearing down the numerous _other_ barriers to widespread adoption.

To use the situation I'm most familiar with: there are hundreds of millions of people in emerging economies who live off-grid and spend tens of billions of dollars annually on expensive fuel-based energy. They'll switch to solar tomorrow if we [1] can solve the problem of upfront financing [2]. It's the same problem that SolarCity, Sunrun, et al. are tackling in the US. This problem is the kind that gets solved by, among other things, developing the same kind of enterprise-targeted mobile/web/backend/data systems familiar to any developer at a modern SaaS company (but targeting a different, unusually interesting and important market, with some unique challenges).

[1] https://careers.stackoverflow.com/company/angaza/

[2] http://www.theguardian.com/sustainable-business/selling-ener...