Hi All, We just got our new 2670BH Keystone Passport. I intend on dry camping and thus planned on adding a second 12V battery. Before I got around to it I noticed that my batter would be dead less than 24 hours after unplugging with nothing obvious "on" in the camper. Over the weekend I went ahead and added a second battery (same size) and left it to charge for the day. Sunday I unplugged it, left nothing on and sure enough, it is dead today.I have read a few posts on the topic and don't suspect the batteries are bad (I suppose that could be the case, new batteries are bad) but wondered if anything pops into anyone's mind with this brand as culprits for battery drain.I ensured all lights are off in every compartmentChecked for switch on freezer (non installed)Checked to make sure fridge is off (does it matter what the other switch is set to (gas/auto) if the other switch is off? Either way, it wasn't remotely cold anyway.I put the TV antenna down today to see if that matters (not sure why it would)Thanks for any help!

First thing to do is install something like a Blue Seas battery disconnect switch.There are parasitic draws even when not in use, but yours sound a bit worse than normal, almost as though something is on that otherwise wouldn't be.

LP Detector is know parasitic drain but not that quick....more like week(s)TV Antenna booster ON?Any lights in storage compartments?Any lights by dump valves....front area?Otherwise.....Overnight drain......you have insulation worn thru....bare wire touching frame/metal Need to check amp drain by connecting a multimeter between Battery Neg post and negative cable.Then remove DC fuses one at a time until amps drop

stereo. the "off" position is really only standby. however, it should take 4-5 days to drain a single 12V battery. drain is not insignificant.Next is leaving the antenna box in the cable position, it again will draw enough to slowly drain the battery.most keystones built after about 2013 have a external battery disconnect switch. check to see if your does.and tv. if it is a 12V TV make sure it is really OFF, not standbyalso, the standard WFCO charger is not likely to fully charge a single battery discharged to less than 50% in 24hours, more like 48 hours. virtually impossible to get them into the boost mode with 55A output, instead it will default to 13.2V and 10A or so tapering down.

I have 2015 keystone 311 Impact toy hauler my battery that the dealer tossed in will stay good for days running the led lights. You can join Keystone forums that address keystone produces and very helpful.

I had the same on my camper - battery would die within 24 hours even with "everything" off (ie lights, radio). I have a battery disconnect, so got in the habit of turning it off at night but I was curious what was draining the battery. Using an ammeter did not give me any clues - although using a volt meter across the battery did show a drain.Last summer, I got I switched off the fridge and CO2 detector - sure enough these items were drawing down the battery.I now switch off the fridge AT THE FUSE BOX at night and my battery lasts the night. I have since added a second battery and a 165W solar panel which keeps the batteries topped up (no more generator)Gerry

2015 Keystone Passport Battery Drain | Good Sam Community

JohnZurk
Explorer
Jul 15, 2015
The disconnect switch is a great option and I plan on installing one, but my problem is that I won't be able to dry camp for more than a day and have any power... even with two 12V batteries. Or, I have to constantly flip the disconnect switch to use anything that needs power of which the refrigerator requires 12V power for the electric igniter.
mbopp
Explorer
Jul 15, 2015
By any chance the break-away emergency switch isn't activated, is it?
ktmrfs
Explorer II
Jul 15, 2015
If your battery is indeed down to 2.8V in the morning I suspect the repeated discharges have basically killed the battery. Anything below 10V is down to almost 0% charge.

12V batteries are usually a combo starting/deep discharge battery and can't take many discharges down to below about 11V before being damaged. Even a high quality 6V deep discharge won't take more many discharges down to 10V. They will take 100's down to about 11V, dozens down to 10V. Few down to 2.8V.

At this point, I'd have the battery load tested and most likely replaced. then you can repeat the tests. the tv amp is load you don't normally want on. likewise with the fridge, it shouldn't draw ANY current with the fridge off.

you should easily be able to dry camp for several days with two 12V batteries as long as your carefull with the lights.
burlmart
Explorer
Jul 15, 2015
i am wndering if the truck alternator charges the house battery when towing. if so, there may be a malfunctioning isolator solenoid stuck on , or a malfunctioning electrical diode or something like that.

with such high current drain, i'd be surprised if you don't get bad sparks disconnecting the battery positive terminal ( be careful if you try}.

to measure current with many mulitmeters like you tried w/ negative term disconnect, you set meter to read DC amps and move the red probe to a different plug opening. read user manual. you will have only 10 seconds to measure this, as it heats up multimeter (at least my walmart is like this)
Slate_CM
Explorer II
Jul 15, 2015
To test current draw, amps, you would disconnect the negative terminal. Set the meter for DC amps. There should also be a place on the meter to put the red probe labeled 10A or so.

Then put black lead to the battery negative and the red lead to the negative battery cable. Don't test anything heavy draw like a tongue jack or heater fan. I'm not sure what a TT should draw with everything off, but on a car it should be no more than about 50mA or 0.05 on the meter.
JohnZurk
Explorer
Jul 15, 2015
Breaks... who needs 'em!

I found that the pin for the break away breaks was pulled, after reading Mbob's post I find that indeed, the pin was pulled. Further reading tells me that this will drain the battery ASAP. Still going to use the mulit-meter to check a few other things out along with an electrition buddy of mine, but I HIGHLY suspect that the pin being pulled (kid responsible to be named at a later date) is likely the problem.

More to follow, thanks to all for the help!
JohnZurk
Explorer
Jul 19, 2015
Once again, thanks for the help... I am all squared away.

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