RV battery maintenance: what the Fleetwood manual actually says

A dead house battery in April is usually a storage problem from November. A handful of habits prevents it. The 2019 Fleetwood Bounder manual spells them out, and most owners never read that far.

Know your two banks

Your coach has two sets of batteries. The chassis batteries start the engine. The house batteries run the lights and most of the 12 V appliances.

They charge each other in specific cases. While you drive, the alternator charges the house bank, and shore power or the generator charges the chassis bank. If one bank keeps dying, that’s the first relationship to check.

The cutoff switch

The battery cutoff on the monitor panel (the manual also calls it Aux) disconnects the house 12 V loads. Turn the interior lights off before you flip it.

If the coach goes dark and you don’t know why, start there. The problem fixer walks the cutoff, then the fuse panel, before it ever suggests buying anything.

Storage rules

The storage chapter is specific:

• No shore power: turn the house and chassis battery disconnects off.
• On shore power: leave both disconnects on.
• Either way: check battery voltage while the coach sits. A discharged battery can freeze and be damaged.

The manual doesn’t give a target voltage in those paragraphs, so use the number on your battery’s spec sheet. The storage checklist keeps the rest of the list, and it remembers what you’ve checked on this device.

Lead-acid and lithium are different chores

Flooded lead-acid batteries need distilled water, clean terminals, and a load test now and then. Fleetwood points you to the battery maker’s manual in your owner’s information file for those steps. Follow it.

Lithium batteries are sealed. Don’t try to add water, and don’t run an equalize cycle on them (a deliberate overcharge some chargers use to balance lead-acid cells). Don’t assume the stock converter’s voltages suit them, either. Read the battery maker’s charging sheet.

When it’s time to replace

The smallest battery the calculator will pick is 1,280 Wh, and most coaches land on the 300 Ah pack. Size yours from your own appliances in the battery bank calculator.

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