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Old 07-11-2015, 02:29 PM   #1
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House battery draining

Just purchased 05 fleetwood bounder workhorse engine installed new batteries for engine and house. When motor and generator are running house battery charges and as soon as you stop the generator house battery starts discharging. Have everything inside off even the main breaker. What is draining the house battery? All help thanks.

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Old 07-11-2015, 03:02 PM   #2
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Originally Posted by REBSIDDALL View Post
Just purchased 05 fleetwood bounder workhorse engine installed new batteries for engine and house. When motor and generator are running house battery charges and as soon as you stop the generator house battery starts discharging. Have everything inside off even the main breaker. What is draining the house battery? All help thanks.
Based on your first sentence, it appears you've installed a new battery for the chassis and, new batteries for the house, correct? A couple things here.

1. When the ENGINE is running, and the fact that it's an '05 Bounder by Fleetwood, you SHOULD have what's called a "BCC" in the front end. That's a Battery Control Center. If you do, inside it is a printed circuit board with some relays and fuses. Also in that box will be at least two large solenoids.

There are circuits on that printed circuit board that control the charging of both engine and house batteries.

2. There's no need to run both the ENGINE and the generator to get the house batteries charged. As explained, the engine will do it, when it's running.

Now, I'm going to assume you have a "Converter/Charger" in that Workhorse chassis too. That converter/charger SHOULD be charging the house batteries while either the generator is running or, you're plugged into shore power.

So, that's how your charging system(s) work. As for what's possibly draining your house batteries while your not charging them, it could be something as simple as compartment lights still on but, you don't know it. And, when you say "Main Breaker" I'm assuming you're speaking of the 120VAC Main breaker, correct?

If so, that won't or, shouldn't have any effect on what's possibly draining your house batteries. That main breaker is for all 120VAC circuits anyways. Your house batteries power up things like house interior lighting, water pump, propane furnace, things like those.

What I might suggest here is, make sure your house batteries are fully charged. Then, un plug shore power or, shut down the generator, whichever is being used to power up the Converter/charger. Take a reading immediately on your house batteries to see what they're at.

Now, start pulling the 12VDC house fuses, (you'll find those near the 120VAC Circuit breakers), one at a time and see what kind of effect it has on your battery voltage.

Another way of doing the same test is again by making sure your house batteries are charged and, then pull the negative cable off of the house battery. If you have a 12V test light, place it in line, between the negative battery post and, the battery cable. If it lights up, with NOTHING ON IN THE COACH, including making sure all compartment doors are shut and, all 12V house accessories (water pump, interior lights, etc.) are OFF, then you've either got a dead short some place or, something is still on, in or on the outside of the coach, that is trying to draw power from the house batteries.

Again, if you have that test light in position in line, and you start pulling the 12VDC interior fuses, one at a time, all of a sudden, that test light goes out after you've pulled a fuse, then that's the circuit that's giving you the problems. You'll then have to trouble shoot that particular circuit to find out where the problem lies. Good luck.

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Old 07-12-2015, 10:33 AM   #3
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Turning the breakers off doesn't affect DC (battery) use much. The breakers are for 120vac (shore/genset) power. You need to look at 12vdc power uses, e.g. gas detectors, step lights, RV fridge, lighting, etc. Those all use varying degrees of battery power when you don't have shore or genset 120v power available. And if you do turn oiff all breakers when on shore power, your 12v converter/charger can't supply the12v needs and the batteries will run down causwe they are the only source of power.
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