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Old 02-16-2011, 09:43 PM   #1
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No hook-ups

How long can I go on one 79ah battery being conservative to very conservative. . It seems there is not a whole lot constantly running off 12v. I figure the fridge and the LP and smoke detector. Then the water pump when needed.

We are planning on at least a week with out hook-ups.

I have a 2011 Mini light 1809. I'm not sure what other info may be needed to help with an answer.

Thanks, Paul
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Old 02-16-2011, 09:54 PM   #2
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the big question is furnace usage. one cold nite using the furnace, can completely drain one battery by morning.

but, just sitting without a battery disconnect, the parasitic drains, alone, can empty a battery in one week.

i seriously doubt, even with conservation, that one battery will last a full week without recharging.
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Old 02-16-2011, 09:56 PM   #3
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I believe what was said(other forum) is you have between .75 to 2 amps for running smoke detector LP detector and fridge. Your water pump takes about 5-7 amps.

That being said being very conservative MAYBE 2-3 days TOPS.
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Old 02-16-2011, 09:57 PM   #4
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Originally Posted by scubieman View Post
I believe what was said(other forum) is you have between .75 to 2 amps for running smoke detector LP detector and fridge. Your water pump takes about 5-7 amps.

That being said being very conservative MAYBE 2-3 days TOPS.
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Old 02-16-2011, 09:59 PM   #5
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One other note. You shouldn't run the battery below 40%. If you do it causes premature failure. Therefore 75Ah you actually have about 40 Ah you should use.

LPG detector draws .2 amps
Single dual bulb light (198 bulbs) 2.3 amps
Single dual bulb light (LED panels) .1 amps
Light fixture over dining table (4 198 bulbs) 4.5 amps
Single reading light over bed (1 198 bulb) .8 amps
Recessed Halogen lighting, living room (6 lights) 8.4 amps Full on
2.1 amps Fully dimmed
Recessed Halogen lighting, over sink (1 light) 1.4 amps Full on
.4 amps Fully dimmed
Recessed Halogen lighting, over couch (3 lights) 4 amps Full on
1.2 amps Fully Dimmed
Refrigerator 1.2 amps
Furnace
(Suburban SF35) 7 amps
Water Pump (Shurflo Smart Sensor 5.7) 11.9 amps running, 12.6 max
Exterior porch lights (3 incandescent bulbs) 2.8 amps
Exterior Porch Lights (3 LED bulbs) .8 amps

http://www.forestriverforums.com/for...draw-9890.html
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Old 02-18-2011, 06:25 PM   #6
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Thanks for all that info! I am considering another battery to hook up in parallel to get at least twice as many amps. I realize that running a battery down is not great for it and will shorten the life of the battery but if you only drain it every now and them, it can't be that bad. Can it?

The chart is nice and I can see where LED will really help out in reduction of power usage.

I think I'm going to test out the system to see how long a charge will last while the trailer is sitting in my driveway. I'll fire up the fridge and let it sit. I'll let you know what I find out.

Thanks, Paul
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Old 02-18-2011, 06:43 PM   #7
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Paul

Just buy a small Generator so that you can recharge the battery.
When we had a TT we had two batteries. One stayed fully charged all the time.
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Old 02-18-2011, 06:43 PM   #8
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Another Reason to invest in a Good Generator. I have a Honda 2000, Not a Big one by any means, and its helps my 30' Sandpiper keeping it Charged by running it every other day at the Most for 2 hours or so, Full tank will last me 6 hours running strieght
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Old 02-18-2011, 08:40 PM   #9
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You can also rent generators at the local tool rental shops.
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Old 02-18-2011, 09:27 PM   #10
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...I realize that running a battery down is not great for it and will shorten the life of the battery but if you only drain it every now and them, it can't be that bad. Can it?
Early in our trailer camping experience, before we had a generator and before I knew any better, I would run the battery down too far and found from then on, it would never hold a very good charge and was pretty well useless within a few months. I now monitor my batteries and don't let them get below 50%. My current ones I have had for 3 years and they are still going strong.

One thing you can do to extend use of a battery while camping is to use flashlights or battery powered lanterns for lighting and not the trailer lights, as the lights (unless LED) draw quite a bit of power.
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