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 > Back up batteries for boon docking

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WoodGlue

Los Angeles / Montana

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Posted: 11/30/13 08:49pm Link  |  Quote  |  Print  |  Notify Moderator

Get two AGM 12v Deep Cycle Marine batteries (probably group 34) and you should be good to go for 3 days. Just be judicious on the use of lights, etc.

WoodGlue

Mik68

Perth, Western Australia

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Posted: 11/30/13 08:53pm Link  |  Quote  |  Print  |  Notify Moderator

So the only way to charge the batteries is from being hooked up using normal AC power or going the solar route? As we are flying into Dallas, purchasing a truck & FW & wanting to hit the road ASAP, there are possibly companies in or around Dallas that could install a system for me?

enblethen

Moses Lake, WA

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Posted: 11/30/13 08:57pm Link  |  Quote  |  Print  |  Notify Moderator

The truck will charge the batteries. It will take sometime to get a full charge. Plugging in overnight should do the trick.
Have you thought about a small genset? A 2000 watt inverter style( Honda or Yamaha) will charge the batteries while dry camping and allow you to use things like the microwave.
You could pick one up at many locations and be on the road right away.


Bud
USAF Retired
Suzuki XL7 pushing Pace Arrow



Mik68

Perth, Western Australia

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Posted: 11/30/13 09:11pm Link  |  Quote  |  Print  |  Notify Moderator

enblethen wrote:

The truck will charge the batteries. It will take sometime to get a full charge. Plugging in overnight should do the trick.
Have you thought about a small genset? A 2000 watt inverter style( Honda or Yamaha) will charge the batteries while dry camping and allow you to use things like the microwave.
You could pick one up at many locations and be on the road right away.

Yes, this is another posting subject for me. I equally know nothing about genset's? How much are they, roughly? And how does it compare to solar pricing? The only negative I can see in going solar is having to park in the sun all the time. Not something we do here in Oz especially as I have worked out in our baking hot sun for the last 20+ years.

CincyGus

Cincinnati

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Posted: 11/30/13 10:35pm Link  |  Quote  |  Print  |  Notify Moderator

Mik68,

Woodglue points you in the right direction. Since you say you are inexperienced and you mentioned "12v car batteries" I'm going to repeat a significant point. You want deep cycle batteries, not car batteries. They are built to take the charging/discharging much better and will last significantly longer.

So regular car batteries are < 12v deep cycle batteries which are < 6v batteries in ability to take discharge and last longer.

The class of battery (or group such as 24, 27, 29, 32, etc.) refers to how much power they can hold with bigger numbers indicating more power and generally larger size.

As mentioned, charging by driving is going to be very ineffective due to the length of the wire run from the vehicles alternator and the size of the wire. Your choices are going to be buy a genny and feed it gas to recharge every 2-4 days (depending on what size and how many batteries you end up going with and your power usage) or adding enough solar to recover your batteries back up to 90%-95% each day from the usage you had the previous day.

Use the search to read some fantastic posts about both Solar and batteries as both have been covered in much greater detail than I have above, I just wanted to get you some basic info before you went out and bought a couple car batteries that you would have been very disappointed in their performance.


2011 Silverado Crewcab 4x4
2012 Passport 238ML

Hope your travels are safe and the friendships made camping are lasting.


Mik68

Perth, Western Australia

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Posted: 11/30/13 11:57pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks CincyGus, yes that is very helpful, as has everyone else on this fantastic forum. We are not getting into all the nitty gritty until we arrive in April so just researching & gathering as much info as possible in the mean time. Solar sounds like a great idea with these deep cycle batteries you & Woodglue have mentioned.

* This post was edited 12/01/13 04:15am by Mik68 *

old guy

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Posted: 12/01/13 12:38am Link  |  Quote  |  Print  |  Notify Moderator

you sure don't want to use car batteries, they are not good for RV'ng you will ruin a car battery in short time with the high discharge you place on them

tenbear

Northern Vermont, USA

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Posted: 12/01/13 05:47am Link  |  Quote  |  Print  |  Notify Moderator

Not sure if you understand this. RVs run on 12v. You can get 12v by using 12v batteries or 2 6v batteries in series. You can then put these pairs of 6v batteries in parallel to give more capacity. A single 6v battery or 6v batteries in parallel won't work.


Class C, 2004/5 Four Winds Dutchman Express 28A, Chevy chassis
2010 Subaru Impreza Sedan
Camped in 45 states, 7 Provinces and 1 Territory


harold1946

Surprise Arizona

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Posted: 12/01/13 05:56am Link  |  Quote  |  Print  |  Notify Moderator

Many FW's come with an onboard generator, especialy in the 35 footers. More than likely it will also have at least a pair of 6 volt deep cycle batteries, possibly 2 pair.
Check it all out before making a purchase. Its better and cheaper to start out with what you want than to add later.


Harold and Linda
2009 CT Coachworks siena 35V
W-22 Workhorse 8.1L
Explorer toad

Shadow Catcher

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Posted: 12/01/13 05:59am Link  |  Quote  |  Print  |  Notify Moderator

Using solar can work very well. We spent eight days on the North shore of Lake Superior in a shaded camp site and our 185W high voltage panel supplied all our needs and we ended up at the end of the eight days with 64% state of charge in our 150AH AGM Lifeline battery. Our teardrop trailer was designed for solar LED lights computer case fans WAECO 12V refrigerator. High voltage panel(s) produce usable current from sun up to sundown and in shady conditions but do require an MPPT controller.
12V 6V makes no difference it is amp hours which may be easier to get with two 6V.
My suggestion is read http://handybobsolar.wordpress.com/ long but worth it. He has specific reasons for his recommendations that are for the most part very valid.

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