I have 4 leisure (sealed) batteries and a starter battery for the engine. I have a Sunsaver MPPT (Morningstar) controller with a 136W solar panel.However, I am hooked up to a shoreline. Recently, the battery 'state of charge' indicator on the controller (I appreciate it is approximate)has been going from green to amber and then red (indicating empty)overnight and then back up again the following day. This is unusual because all 'summer' it has been on green, permanently. Simultaneously, the counter on the shoreline electricity post seems to be creeping up although there is nothing switched on (e.g. immersion not on, computer only). I'm guessing the first thing to do is check the batteries with a multi-meter and based on this get new batts? Has anyone with the same solar panel/set up had the same issue? The other thing I should say is that I have no idea when the batts were installed. Worse case scenario....2005 when the boat was built! I thought the batts were being drained because I had left a tap running v slowly and the pump was kicking in sporadically. However, this can be ruled out. Maybe just a case of knackered batteries?