Solarcity gigasolar panel factories and Tesla gigabattery factories are Elon Musk moves to outscale the industries to drive down costs while scaling...

SolarCity installs 25% of the residential solar panels in the United States.

SolarCity said it was in talks to build a giant solar-panel factory near Buffalo, New York “At a targeted capacity greater than 1 Gigawatt within the next two years, it will be one of the single largest solar panel production plants in the world,” the company said in a blog post.

If the solar industry were to generate 40 percent of the world’s electricity with photovoltaics by 2040, that would mean installing more than 400 GW of solar capacity per year for the next 25 years. We absolutely believe that solar power can and will become the world’s predominant source of energy within our lifetimes, but there are obviously a lot of panels that have to be manufactured and installed in order for that to happen.

SolarCity is acquiring Silevo for as much as $350 million in an all-stock deal. Silevo is known for its high-efficiency Triex modules, and SolarCity CEO Peter Rive said in a conference call that the company was eventually aiming to produce panels with 24 percent efficiency.

Tesla plans to build a battery “gigafactory” that by 2020 will have the capacity to produce just over 10 times the amount of batteries used in all electric vehicles in 2013.

Tesla wants to be in production by 2017 — three years from now — and at max capacity as soon as 2020. The “giga” in the name apparently comes from the 2020 plant capacity: 35 gigawatt-hours (GWh) per year in cells, 50 GWh/year in packs, suggesting Tesla would bring in batteries from outside.

The Gigafactory will facility have 10 million square feet.

Combined having the largest solar panel and advanced battery factories means that Elon Musk can provide cheaper solar power with battery storage

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