According to the specs, it is a Sol-Ark 15K. A good idea for them is to increase volume and resel their units white labeled. A big company like Duracell might move a descent volume and provide a healthy revenue stream to Sol-Ark for reinvestment, keeping strong support and continual firmware updates, rather than rapid hardware expansion. Don't get me wrong I love new hardware, but I don't want the solar industry to become the TV industry where rather than improving the products that have been sold, they hold back software capable of providing a better experience eon current hardware for new models to create demand rather than a quality experience after the sale.