thank you all for your help and advice! I am lucky that I have the remote in the galley and the site at xantrex did have downloadable pdf files on the 1800, although it was hard to find. The tranfer switch is fine and so is the inverter........it is 14 yrs old so, touch wood(steve taps head) it'll last a few more years yet.....have fitted a 60 watt solar panel and it is perfect for keeping the batteries at 100% whilst in the marina. Hope this finds you all well and managing to get some sailing. steve