Solar module makers are struggling even as cost points are at a bare minimum (and arguably unsustainably so) — and yet lower prices persist, especially in lower-end crystalline silicon (c-Si) modules. However, there is still improvement to be made in efficiency, says Dave Epstein, CEO of Sol Voltaics. More efficient panels can both be sold at higher prices and installed with fewer panels to reduce the cost profile of an entire project. The economics improves for everyone.