I recently purchased from a supplier on ebay a 100W suitcase type solar panel, but the regulator supplied packed up after one trip away, have since purchased a similar controller that I had to wait for coming from China, that one did not work at all so now I've paid a bit extra and received a classier looking component with dial indications of battery voltage and charging rate but that one only lasted one day and has also packed it in, so can you motorhomers suggest a decent controller that I can purchase from a reliable UK source, will need it for next season starting in April.