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Battery drain damon astoria 3773(2007) mark 10-10-16  
Can anyone help,
When I put a meter on the positive lead I have around a 2.5-2.75 amp drain on my leisure battery(its a new battery) with everything turned off inside the camper(the two chassis batteries hold they charge)ie if i go to bed at 11.00pm with the leisure battery topped up to12.5volts showing on the reader in the camper when you get up at 8.00am it will show 7 or 8 volts on the reader...........what is the drain?and how can I stop it?

Cheers mark.
From England.
Re: battery drain damon astoria 3773(2007) Bubba The Bus Tech 10-11-16  
1 st 12.5 volts technically about 25% charge. 12.1 is considered dead for deep cycle batteries.

2nd 12.5 on the panel is very inaccurate unless checked more than 1 hr after charging stops, so your battery may have a "surface charge" only. That means they went charged at all.

3rd All RVs have between a 0.5 amp to 1 amp draw from LPG detector, CO Detector, Stereo, All the boards that run the furnace, water heater, fridge etc.

4th If you have a Dometic fridge there may be a "Climate" Switch between the freezer door and control panel. You have to open the freezer door to see it.

5th when your batteries get this dead it takes 3 to 5 days, 24 hrs a day continuous charge to get them back to 95% charged.

So you may not have any more problem than not fully charged batteries and a switch left on.

Good Luck
Re: battery drain damon astoria 3773(2007) mark 10-12-16  
Hi bubba thanks for your reply,i will give you a bit more info.
1 st 12.5 volts technically about 25% charge. 12.1 is considered dead for deep cycle batteries.
The battery is a 200amp battery that i have charged for 2days on a battery charger.

2nd 12.5 on the panel is very inaccurate unless checked more than 1 hr after charging stops, so your battery may have a "surface charge" only. That means they went charged at all.
As soon as you connect the battery cables to the battery you get a reading from a hand held meter after about an hour 12.5-12.75volts and with a meter clamped around the positive cable a 2.5 amp drain.

3rd All RVs have between a 0.5 amp to 1 amp draw from LPG detector, CO Detector, Stereo, All the boards that run the furnace, water heater, fridge etc.
I have turned all the switches off on the panel board,the fridge is turned off,i have even unplugged the converter and inverter and it still shows 2.5amps going out of the battery.

4th If you have a Dometic fridge there may be a "Climate" Switch between the freezer door and control panel. You have to open the freezer door to see it.
Fridge is turned off

5th when your batteries get this dead it takes 3 to 5 days, 24 hrs a day continuous charge to get them back to 95% charged.
Your 1st answer.
So you may not have any more problem than not fully charged batteries and a switch left on.
Re: battery drain damon astoria 3773(2007) Bubba The Bus Tech 10-13-16  
Point 3 and 4 The Climate switch on the Dometic fridges is independent of the on/off function. It will continue to draw 12 volt power even though the fridge is turned off. This is a gasket heater for the freezer door to help the freezer from building up ice.

Checking battery voltage must happen more than 1/2 hour after the charge system is taken off or the battery will show much higher charge than it actually is. RV Deep Cycle batteries charge much much slower than you would think. Normally 3 days on the charger minimum, usually 5 days. you charged your for 2 days and depending on the charger 50% was possible but 25% was likely.

Finally to properly diagnose this, Check your draw and then start pulling fuses. Once you find the or more fuses that stop the draw you now can see what doesn't work and what was drawing the power.

Good Luck
Re: battery drain 2002 E350 Chinook Concourse cottnpickr 11-23-16  
My '03 Chinook ('02 E350 chassis) has started draining the chassis battery when parked. Began about a mo ago. Battery checked bad and was replaced, but new one is also dying. Seems to have about a 3.9 amp drain w/everything off. When battery cables are disconnected and then reconnected, there is a clicking from the clearance light relay in the fuse box, and all four signal lights and the clearance lights flash for about 30 secs, then stop. Is this normal? Have pulled most fuses (cannot reach all of them under dash) without finding problem. The only other thing that has been done is the Onan generator mother board was replaced recently for an unrelated problem, but I think this pulls from the house batteries, not the chassis battery. Any ideas, suggestions are most appreciated. Thanks.
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