The Renogy 20A Male and Female Connector in-Line Fuse Holder is a 20A inline fuse embedded into a waterproof fuse holder. It features a solar connector lead on each end, making it compatible for use with an Adaptor Kit and solar panel leads. This Fuse Holder is designed to provide complete single-circuit protection to your solar power array. The fuses prevent large currents from damaging the solar panels. Purchase this product for extra protection on your system. | Renogy | | 20A Male and Female Connector in-Line Fuse Holder | Black | Best Buy