Advice on leisure batteries

dowson701

Hi

I am looking for advise with regards to my 4 year old 110amp Leisure Battery which was purchased from my local caravan dealer

I have always maintained this battery (as indicated on alpha-batteries web site) and now the battery is in storage in my shed during the winter months on a 10watt solar panel charge. I have always stored the battery like this every winter. The solar panel
which is facing south and fixed at 45 degree angle is working well and producing around 0.3 to 0.5 amps per hour during these short days

 

Problem

After disconnecting the panel from the battery, the battery was indicating 13.2 volts and a follow up recheck after 48hrs period the battery fell to 12.3 volts with no load on the battery in that time period. The battery after 4 days is now at 12.2 volts

What would be recommendation in this matter as my concerned is with the fact that next season I will caravanning more without main hook-up