This was added to an RV with a direct connect to the house batteries. Overall, a well-made unit, the electrical spade connectors are crimped and are a tight fit. This install was in a relatively inaccessible are so the interconnects had to be made prior to attaching to the bulkhead. In this case, a cutting template would've made intallation a lot easier as the rectangular cut has to be smaller than the provided plate but large enough to accept the nuts that hold the three components onto the plate - not much margin. Once in, it works well.