Battery Isolator Not Working

It came with either a Newmar or Surepower isolator...blue with lots of fins. I replaced the original with a replacement and got about 18 months out of it before it went sideways. I got pissed off and out of irritation started a websearch to see what options were out there and stumbled upon this perfect switch battery isolator. It was different than anything else I had seen and I was skeptical. Poured through their website , looked for feedback on other forums and there wasn't much out there, but what there was, was positive. I finally called them directly and was very impressed with them. Answered all my questions and concerns and gave it a shot. They apparently do a lot of product for military and specialty applications. I am glad I tried it. It does exactly what they say it does without getting hot. I have the dual rectifier isolator which is the same as the surepower device....but it works. Yep, I'm a fan and if I can steer business their way, I'm happy to do so.