With the increased use of 240V shore power by boats in a marina, zinc anodes are struggling to last as long. Installing a galvanic isolator (also known as zinc saver) maintains a good earth link to the shore and reduces anode loss.
Specifications:
Amps: 30A.
Dimensions (L x W x H): 220 x 120 x 100mm.
Weight: 1.5kg.