Any advice please I put two 90 w leisure batteries on about three years ago and they did drain rather low a couple of times but at Easter we were camping without electic for four days with grandkids hence tv on most of time leisure batteries dropped below 11 a I do have a 140 solar panel but no sun that weekend I have a battery mate from leisure to engine when I came to start the engine leisure was reading 12 engine would not turn over enough had to jump start have since put two 115 banner batteries on does the battery mate reverse from engine to leisure and do I need a naw engine battery which is about three years old but has been fully discharged a couple of times any help thanks