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Even in 2018, few main stream UK built Caravans/Motorhome's have even a Gel profile, let alone AGM.
Don't forget that a new battery can take several cycles to reach full efficiency, typically 10 - 20 charge/discharges. The required battery capacity will also be dramatically affected if using motor mover equipment which consume large amounts of power over a very short time. In general, it's probably best to avoid AGM batteries unless you are absolutely sure your charger is suitable, as the otherwise excellent performance counts for little if the performance is compromised through damage by inappropriate charging".
Yuasa Active Leisure L36-AGM Battery
Sorry, can't help you with specific resting, 50% DoD, equalizing or absorbtion voltages in your case as I've never looked at Yuasa technical manuals. I would guess equalization with a maintenance free, sealed battery is not the best idea. I find it quite strange that a highly capable battery such as the L36-EFB has been given a duff label by the NCC. The discount isn't meant to be a 'real discount', it is just so that they can gauge the amount of support they are receiving from 'The AandNCaravan Battery campaign' to help decide if their new ethical policy is what buyers want. Yuasa’s Active range features three types of battery technology. Conventional Flooded, Enhanced Flooded (EFB) and Absorbed Glass Matt (AGM). B. Never boost-charge any battery that is below 11.00 Volts as it will be too sulphated to accept a charge; scrap the battery or charge normally.
The ET650 is more tolerant of dropping to 80% DOD without actual 'damage', it is one of the true Deep Cycling batteries but you will lose about a third of the cycle life if you do it regularly. At a guess, you would achieve 250 cycles at 80% DOD as opposed to 350 cycles at 50% DOD. But that is only a guess. Yuasa, and all other manufacturers, state that for maximum battery life, a Lead acid battery should not be discharged below 50% Depth Of Discharge (DOD). For a modern battery that is between 12.5 and 12.2v depending on the Technology in the battery, as it is the technology in a battery that dictates the battery State Of Charge voltage. Allegedly BMW are preparing to do the same. Some BMW Dealers have been replacing failed AGM batteries with a Wet Acid technology version, E nhanced F looded B atteries (EFB), for some years to very good effect.
FAQ
For some reason the NCC think it is ll about 'Storage Capacity', and batteries are rated on size/capacity, not cyclic ability or other qualities In which case the time it takes to do that will also depend a lot on the power of the installation, if it is only an 80w Solar panel, it could take quite a while for the charge to make an impact on a discharged battery bank, so it could vary a lot with different set-ups and discharges. span>
charge when not in use or when not being charged.
If the charge level drops too low for an extended period (12.4 volts and below), permanent internal There are rumours of a high technology version of the ET650 on the horizon that will use EFB technology but still be a Deep Cycler but not sure when it is due. These maintain a fixed, constant, pre-set voltage throughout the charging period. The current cannot be set and will fall as the battery state-of-charge increases. motorhome or caravan receives the power it needs.
Charging a leisure battery is a simple process. For motorhomes, whenever the vehicle’s engine The NCC’s Verified Leisure Battery Scheme ensures it is easy to identify which batteries on the market are quoting accurate, verified specifications.The majority of commercial chargers, particularly home-chargers, are of this type, and allow neither the voltage nor the current to be preset. Use the same procedure as for Constant Potential Chargers in the paragraph above. Boost Chargers As an overall percentage of the UK Caravan and Motorhome market, the inbuilt chargers with an AGM profile is very, very small.
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