Having had the Banner batterys for 20 months I found them not to be holding a charge and after consultation with Martin Bushnell at http://www.aandncaravanservices.co.uk
I came to the conclusion that the AMG battery's where not being charged properly with EHU and Solar and Engine power. So I decided to go to 2 x Yuasa L36-EFB battery's. They are a Enhanced Flooded Battery (EFB) and should be able to be charged correctly. Information links follow.
Please see http://www.aandncaravanservices.co.uk/agm-batteries.php for more on AGM. Also if this is in a Motorhome and you don’t have an AGM for the starter battery and an AGM compliant “smart” alternator, this will cause improper charging because you can’t mix technologies. Please see http://www.aandncaravanservices.co.uk/battery-technology.php for more on battery technology.
So far they have been fine they sit at a lower voltage around 12.7v than the AGM but time will tell.
The Yuasa L36-EFB (not the L36-100) is an enhanced flooded battery and requires 14.4 volts for between 4 and 6 hours dropping to 13.7 for float charge. Long term maintenance voltage should be no more than 13.3 volts.
The Dometic charger is set ON ON OFF OFF on the dip switches.
High quality Yuasa 100AH EFB (Enhanced Flooded Battery)
YBX Active Leisure and Marine EFB
EFB technology for greater endurance, higher cycles and faster charging
Optimised for repeated charging & discharging
Original equipment quality & specification
NCC Verified Class B Sealed maintenance free
Supplied charged & ready to fit
Enhanced safety features including integrated flame arrestor and carry handle
Up to 1200 watt hours
Up to 200 cycles
Increased dynamic charge current acceptance over standard wet-flooded batteries (+170%), due to improved design including special Carbon additives and high charge acceptance envelope type separators
Increased cyclic durability over standard wet-flooded batteries (+100%)
Caravans, motorhomes, boats and other modern leisure vehicles feature more technology and electrical appliances than ever before. YBX Active Leisure and Marine batteries are specially designed to provide dependable, stress-free power and long life.
EFB batteries are an enhanced version of standard wet-flooded technology. The primary benefits of EFB technology are improved charge acceptance and greater cyclic durability when operating in a reduced state of charge