I purchased an Elecsol in 2001 and used it on an Abbey with the new motor mover we had just bought. The Abbey had a 3 way switch that allowed power from battery, car, or built in charger. As all lights were 12 volt I switched to battery and ran off battery, even when connected to mains, until meter showed red and then switched to charger to recharge battery. The battery failed in just under 2 years. Initially I contacted Elecsol direct in view of their 5 year warranty. Despite sending copies of receipts I got nowhere and found them very unhelpful. I finally visited the dealer where I bought the battery, a considerable distance from home and they replaced the battery immediately. Since then I have used the replacement Elecsol on 3 caravans with motor movers and it is still working. However I ensure that it is always connected to charge when in use so that it does not run down. This now happens automatically in my current Bailey unlike the Abbeys where I had to select charge. Whether discharging and recharging was the reason for the first failure I don't know, but I would recommend that anyone buying one does so through a reputable dealer that will honour the guarantee in view of my problems when try to claim under the guaratntee direct.
Henry B