This kit comprises of a 12V 300w element, Solaris controller, and high current relay required. A level sensor is also included to ensure the element is always covered by water. 
 
This is a perfect addition if you already have the Bobil Air Xchange set up, but want to add an electric element so that you can use any excess battery power to heat your water. 
 
Please note: This is NOT a replacement kit for the Bobil Hybrid kits.