this may help for storage conditions from owners manual

[johnnyreno]

Your motor home is equipped with heavy-duty deep cycle or absorbed glass mat (AGM)

batteries. If the batteries need to be replaced, only deep cycle batteries of the same size and

type should be installed.

Unless a battery has been fully discharged, house auxiliary batteries are normally charged in

one of two ways:



When the power cord is plugged into 120-volt shore power, or when the generator is

operational, the inverter/charger functions as a multi-stage battery charger and will

automatically charge the house auxiliary batteries when required. A bi-directional charge

relay incorporated into the electrical system allows the inverter/charger to charge the

chassis batteries once the house auxiliary batteries are sufficiently charged.



The chassis alternator charging system supplies power to the house auxiliary batteries when

the engine is running and the chassis batteries are sufficiently charged.

[stevedenesha]

I should be good to go as soon as I figure out how to run an extension cord from my house to storage (only 4 miles)! Too bad the inverters doesn't show the chassis battery being charged instead just shows fully charged when house batteries are charged.

[brobox]

Just as Dave was saying and that is good news. Nice to know I won't have t mess with an external float charger again.

[johnnyreno]

the thicker the ext cord the better that's all I know I bought mine frm home depot it has a led in the female end so you can see it a mile away that u still have power