Many American Motorhomes in America are left plugged into an external power source continuously, therefore the manufacturers fit a charger that will not allow the acid in the battery to evaporate, and this also means that no topping up is required.

for a few hours with one light on!” The problem more often than not is the battery charger. This is then followed by “The leisure batteries don’t last very long before they go flat, we only watch the T.V. State of Chargeįrequently when LAS are servicing a motorhome, the owner will ask us to check the batteries. This would then enable you to charge the leisure batteries whilst travelling at the required greater voltage. Even if this is the case, you will then need to fit a devise that will increase the charge voltage from your engines alternator. The voltage required to charge them is greater, therefore you will need to replace the original motor home charger if it is not programmable. batteries is different to that of the lead acid battery. ones, there are a few other things you should know. This means that the lead acid battery can run appliances longer each single charge.ģ. An A.G.M battery should not be overcharged, as it will shorten its life or can immediately kill the battery.īefore you all go out and replace your leisure batteries with A.G.M. batteries can only be discharged to 50%, whereas the lead acid battery can be discharged to 80%. battery is considerably more expensive.Ģ. The deep cycle A.G.M. batteries can stand very low temperatures without freezing.ĥ. These batteries are also very resistant to vibration, due to their sandwich construction. This allows them to be used safely inside a motorhome.Ĥ. A.G.M. batteries do not give off any gas (hydrogen) when being charged, so there is less concern about ventilation when charging them. battery never needs any water, and is considered to be maintenance free.ģ. A.G.M. This means if you turn the battery upside down, the electrolyte will not spill out of an A.G.M. battery is seen as a rectangular shape case, the plates themselves can be changed into any shape, including flat or even cupped.Īs manufacturing processes have become cheaper, these Deep Cycle Batteries (Leisure Batteries) are now used in Motorhomes. These glass fibre mats do not absorb the electrolyte, but simply hold the electrolyte preventing it from spilling when the battery is tipped over. battery will not freely flood the plates, as the glass mats will prevent this happening. battery to work like a lead acid battery, although the electrolyte in the A.G.M. It was given this name because these batteries are made up of mats, in which the glass fibres are woven to increase the surface area. is the abbreviation of absorption glass mat. battery was originally designed to be warm weather and vibration resistant.Ī.G.M. This was an alternative to the then very expensive Ni – Cad batteries, which were used in naval helicopters and fighter jets. During the 1980s the aircraft industry developed the A.G.M.

Charging agm deep cycle batteries