In an SEC filing today, San Jose, California-based solar power SoloPower revealed that it has raised another $51.6 million in venture capital investment to design, manufacture and distribute its thin-film solar technology.

SoloPower specializes in the design and production of flexible solar power panels that are made from copper-indium-gallium-selenide (CIGS). According to Tech Crunch, the solar technology is useful in areas where inflexible, cumbersome solar panels will not fit. SoloPower affirms that it manufactures its "CIGS cells on flexible metal foil." SoloPower then provides them with a "moisture barrier and environmental integrity" before shipping them to its clients around the world.

Currently, SoloPower serves customers in Australia, Western Europe, Asia and North America, but it recently attained a safety certification from the international product safety company, Underwriter Laboratories, that will enable the solar company to sell its products in new markets.

SoloPower is also hoping to secure a $190 million loan guarantee from the U.S. Department of Energy to expand its manufacturing capacity, and a $20 million state energy loan in Oregon, where it hopes to build a new plant.

SoloPower's newest round of funding was backed by its previous financiers, including Crosslink Capital and Hudson Clean Energy Partners.