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Old 07-23-2015, 07:25 AM   #1
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When boondocking

How long do two new batteries last( deep cycle 600cca.) When your boon docking ?
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Old 07-23-2015, 07:52 AM   #2
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Easy answer…….you're gonna hate me

One to seven days


Part of the fun ( for me ) of boondocking is seeing how long you can make your batteries last.

Furnace blower is biggest power hog ( I just use it to warm camper then turn it off )

Next is water pump ( take quick showers )

Incandescent bulbs are wasteful ( don't leave lights on, change to led and I use garden solar lights and candles )

Sorry there is NO easy answer to this one
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Old 07-23-2015, 08:00 AM   #3
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No simple answer. Depends on condition of batteries and your usage. Even new batteries can be in poor condition.
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Old 07-23-2015, 09:14 AM   #4
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The above is spot on. But on average I would say, 2 days of normal, minimal camping use in warm weather.

Lots of things you can do to improve that.
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Old 07-23-2015, 09:29 AM   #5
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I forgot

Another big factor is how many people are camping with you.

The big factor for me is weather

Cold nights-----furnace

Hot afternoons-----fans
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Old 07-23-2015, 02:36 PM   #6
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600 CCA is not as important to know as how many amp hours the batts have. 80 amp hour batt means an 8 amp draw will do you in in 10 hours.
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Old 07-23-2015, 02:49 PM   #7
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It does vary widely but if you take reasonable conservation measures -- don't use the furnace except briefly in the morning, don't run the fantastic fan more than a few minutes at a time, shut off lights except when using them -- you can get several days out of a pair of batteries.

In cold weather where you have to run the furnace it becomes more difficult and you can pretty quickly reach the point where an overnight stop is about all you can do.
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Old 07-23-2015, 03:11 PM   #8
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Just two of us, all LED lighting, no furnace blower = 3.5 days to 50% state of charge with 2 group 29 LA batts. The trimetric says 125 aH used at 50%
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Old 07-23-2015, 03:42 PM   #9
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Quote:
Originally Posted by Ducky2 View Post
How long do two new batteries last( deep cycle 600cca.) When your boon docking ?
There are too many variables to give you a meaningful answer. Best thing is to try it yourself and see how far you get. You should be able to get through at least one 24 hour period.
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Old 07-23-2015, 04:36 PM   #10
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We have 2 group 27 batteries. The first year we stayed in Glacier NP with no hook-ups and were there for 4 days. This was a no heat time and careful use of lights and water pump. We are on the 5th year now and don't think they'd last as long but really haven't stressed them lately.
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Old 07-23-2015, 05:17 PM   #11
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Here are our battery-saving tips for boondockers. If anyone's got more or better, let's hear about them.

Start with your batteries fully charged, or charging fully during your drive.

When we're parked and away in our truck for the day, we turn off the fridge and then the main battery. Our freezer is full of those blue gel ice pacs, and we pack a few of them around the food. The fridge is incredibly well insulated.

In cool weather, turn off the fridge fan. (This may require a mechanical adaptation: our old AS needed to have a switch installed.)

Turn off the pump when not in use. The toilet needs the pump turned on about every 3rd flush-- usually there's enough water in the system. You can also do a manual flush using water bottles. For a shower, turn off the water when not actually rinsing down. (Water-saving is another topic.)

LED lights, for older units that don't come with them.

An e-reader with its own light. Recharging small items like cell phones off the vehicle or a small solar recharger.

When we need the furnace, keep it on a low setting. Just wear extra-warm clothes and have an extra warm bedding.

If this is feasible on a hot day, have the awning relatively low and on the sunny side. This is probably the west, but it depends on any natural shade. Minimizing the need for electrical cooling.

No electrical appliances: for example, we use a drip coffee system involving a metal carafe or thermos, a collapsible cone from REI, and paper filters. We just heat up water on the stove.

Minimal on-board cooking. Grill outdoors, bring prepared foods, or foods that are good in their natural state. That way, you don't have to run the stove fan. Or heat up the AS on a hot day.

Sparing use of ceiling fans.

Greater use of campground facilities, where clean and convenient.

Back-up generator. Our Honda 2000 runs everything but the AC. It also recharges the batteries somewhat. We've not gone solar, but it might solve a lot of boondocking issues.

Other ideas out there?
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Old 07-23-2015, 05:45 PM   #12
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I'm confused by this statement:

"Back-up generator. Our Honda 2000 runs everything but the AC. It also recharges the batteries somewhat."

Your gennie should take your batts from 50% to over 90% in less than 2 hours. That last 5 - 10% takes forever due to the converter dropping the current output toward the end of the cycle. But a couple hours every 2 or 3 days you should be able to go forever..... Unless your trying to charge with the 12 volt output on the gennie???? If so, you shouldn't.
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Old 07-23-2015, 05:58 PM   #13
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In warm weather we last 3-4 days easily. LED lights used sparingly (we go to bed early), fridge on propane (we don't seem to have a fridge fan (?)), water pump. No heater, no TV (we never watch it when we're camping - TVs and camping just don't go together for us). We charge phones in the car when we go somewhere.

Cheers,
John
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Old 07-24-2015, 03:03 PM   #14
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Quote:
Originally Posted by dznf0g View Post
I'm confused by this statement:

"Back-up generator. Our Honda 2000 runs everything but the AC. It also recharges the batteries somewhat."

Your gennie should take your batts from 50% to over 90% in less than 2 hours. That last 5 - 10% takes forever due to the converter dropping the current output toward the end of the cycle. But a couple hours every 2 or 3 days you should be able to go forever..... Unless your trying to charge with the 12 volt output on the gennie???? If so, you shouldn't.
We have two six-volt batteries operating in tandem. They take longer to recharge, but also longer to draw down.
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