TLDR.... as per cuppas suggestion donkey's ago I bought the suntrans and change my supply lead as I found even in good sunlight the 180w panels weren't up to scratch. After changing the two, albeit not the best but at an affordable rate, and still mounting the reg on the back of the panel. The difference was outstanding.
I could have spent more and mounted the reg at the battery but I didnt but it still made a massive improvement. Its all different now my setup but the last setup work great for the money I spent.