Can anyone offer advice on how to check the condition of gel leisure batteries? My problem is that the batteries are fully charged (13.8V) at the end of the day by the solar panels but by the morning they show 12.5V and very quickly discharge down to 11.4 when blown air heating and TV are switched on , approximately 5 amp current draw. The batteries are 2 120 Ah Banner units which should give more than the one hour I got this morning. Posted on another forum, really need some guidance.:Sad: