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boondocking and batteries

bcbouy
Explorer
Explorer
i'm waiting for my northstar 850 sc to be delivered and find i'm thinking alot about battery power.i'd really like to hear from the boondockers and especially the northstar owners as to what i should be looking at.my old pop up didn't even have a battery so i really don't know what i need a/hr wise for say,a 3 day weekend. we also disappear into the woods for weeks at a time a couple times a year and thats when the power really comes into play. i have a small 500 watt genny and i'm not interested in solar at this time but i welcome any and all opinions.i've tried the search function but i'm even more unsure now.
2012 ram 2500 hemi crew cab sb 4x4 2015 northstar 850 sc 14.5 g3 guide custom fly fishing boat
20 REPLIES 20

DWeikert
Explorer II
Explorer II
A lot depends on what you plan to do those weeks you disappear into the woods. I have 275 watts worth of solar feeding 2 grp31 AGM batteries and as long as I don't get more than a couple cloudy days in a row that will keep me charged. But I also have a DC compressor fridge and an automatic satellite dish to watch TV. If you replace all incandescent bulbs with LED's, keep the fridge on LP, use the furnace sparingly, and don't use any appliances to speak of, you could possibly get 3-4 days or more on a single grp27 before you need the genny to top it off. If you do any driving while in the woods, you may not even need the genny.
Dan
2008 Chevy D/A 2500HD ECSB
2010 Northstar 8.5 Adventurer

Dirtpig
Explorer
Explorer
Hey bcbouy, having 2 group 27 or 31 batts in your camper will get you by easily for over a week or longer in the summer and about 3 nights in winter if u use your furnace. These are my results. I Don't have tv's or high draw goodies. When go camping I go camping. Usually run a radio outside most of day to keep Cougars away. The 500watt gen may not be enough juice to run your new campers converter/charger but you could bring along a suitably matched battery charger and hook that up to your batteries.
2015 Nash 25C bumper pull /w 300watts solar my install
My Truck & RV youtube channel
2005 F-350 Diesel 4x4 CC SB SRW
2001 Honda XR400: many mods
12ft Lund WC boat & 9.9 Yamaha 4 stroke on custom loader.

trail-explorer
Explorer
Explorer
trail-explorer wrote:
Step 1 when you get it is to upgrade to LED Lights, unless it has them already.

I'm running lights from www.ledtrailerlights.com as are a bunch of other members here.


Here's my thread from a few years ago....l

My Easy LED Upgrade
Bob

bcbouy
Explorer
Explorer
Great info guys.i have 2 12 volt deep cycles in my boat that I charge with my little genny so I know it works.i think im leaning towards another one to learn my power consumption before I break the bank on an agm or 6 volt bank.i will try 100 amp hrs and see where I am at after 3 days.thanks very much. something i just thought of..i have a 1000 watt inverter that i hook to the truck battery.can i run a batt charger off it to the camper battery without damaging the camper charger/inverter?
2012 ram 2500 hemi crew cab sb 4x4 2015 northstar 850 sc 14.5 g3 guide custom fly fishing boat

Mote
Explorer
Explorer
what size of wire are you guys using to connect the second battery to the original ?
I am assuming you're matching the existing battery wire size.
2005 Dodge 3500
2001 Lance 1030
2006 Cougar 29RL

bka0721
Explorer II
Explorer II
Oh, my.

There is a lot of information that really is not helping the OP. As well as suggesting what he/she should or shouldnโ€™t do. One thing is for sure, a couple of batteries and a long weekend is a perfect way to enjoy your Truck Camper, in all seasons. Battery management is really the solution.

Jfet has the best information shared. To be successful boondocking and using your batteries is to monitor them. A simple battery monitor would help. The idiot lights you have in your camper are warning devices for when you are in need of charging, not so much as a warning.

While you are learning and testing your boondocking limits, invest in some inexpensive batteries. Wal-Mart and Costco are good places to begin, as they have excellent warranties. Buy yourself a good auxiliary Battery Charger Clicky. I would stick to whatever batteries fit into the area you have for your battery compartment, or the areas available in the foot wells, as many have done. Invest in proper cable sizing too. If the batteries are in a remote area (wheel well) use auxiliary charging posts/cable to reach them. We had these installed on the back of our race cars and bumpers/trunks of our patrol cars. Aux Battery Post Clicky

I had suggested the same thing to another RV.net poster (DJ) here and this is what he did to assist charging his own batteries that were located in a difficult to reach Battery Compartment.




Most will do fine with a long weekend with deep cycle batteries of the Type 27 to Type 31 sizes (200-300 AmpH, which is very different than cranking amps). When driving your alternator will suffice if the distance is a couple of hours. When boondocking you are usually in a location for a day or two. With daily use and weather events complicating things, you might draw your batteries down before you are driving down the road again. Just get the aux charger, attach it to the posts of your batteries and plug it into your now running invertor generator or outlets in your camper. Charge the batteries for a maximum of 1.5 hours at a time. Surface Charge will develop and you then are wasting generator time and money for fuel. Let the batteries rest for an hour or two and charge them again, using the same procedure. A good regime is first in the morning and then in the evening, all verified by your resting State of Charge. If it is getting down to 12.2-12.1v, then you need to charge your batteries. No matter what others uses are stated, your actual battery S.O.C. is what should dictate your charging parameters.

Yes, you can do it with just two 12v or 6v batteries. Whether Flooded or Wet Cell Batteries. My best advice, donโ€™t splurge on expensive batteries to begin with. Use this first set to learn the ropes, unless you are unlike me and have a really large checkbook. I just swapped out one of my battery banks after 5 years of hard continuous use, 1,825 cycles. The difference of the S.O.C. over this 5 year period to the S.O.C. of the new batteries is enormous. Things wear out the more you use them. But why wouldnโ€™t you use them? Enjoy. I have attached an AmpH Demand Survey I made for myself 5 years ago, below.

b

08 F550-4X4-CC-6.4L Dsl-206"WB GVWR17,950#
09 Lance 1191
1,560wSolar~10-6vGC2-1,160AmpH~Tri-Star-Two(2)60/MPPT~Xantrex 2000W
300wSolar~2-6vAGM-300AmpH~Tri-Star45/MPPT~Xantrex 1500W
16 BMW R1200GSW Adventure
16 KTM 500 EXC
06 Honda CRF450X
09 Haulmark Trlr

pianotuna
Nomad III
Nomad III
Hi,

Check out the converter and see what it draws in watts. Size the generator to 125% of that amount.

On the other hand, if you wish the battery bank to last years and years, add a modest solar system. Cost for all materials is under $2 per watt.
Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

ewarnerusa
Nomad
Nomad
I'm not terribly familiar with TC, but I'm assuming it utilizes a converter/charger for the 12V system. I don't think a 500 watt generator would run the converter at full load. I won't plug solar too much since you say up front you're not interested, but I do say you will need a bigger generator in order to run the converter to recharge the battery/batteries.

Based on the volume of boondocking you do, a minimum of 2 x 12V or 6V batteries and converting all lighting to LEDs would be what to start with. I'd shoot for 150+ Ah storage capacity. I see a nice fridge in the website pictures for that TC that I'll assume is 2-way (gas and electric) and will be a source of parasitic draw. So even if you use LED lights and water pump sparingly and no furnace, there will still be a drain on the battery. So a bigger generator for running the onboard converter would be a good idea (or solar, just saying...). I guess you can always fire up the truck to provide some trickle charging, or maybe upgrade the charge path from alternator to maximize that charging potential, but it will still basically be a few-hundred-horsepower trickle charger. With 2 x 12V or 6V batteries, I think you'll get by without needing recharging for your 3 day trips if you are stingy with your power use. But for those "disappear off grid" trips you've described, you'll need a way to recharge those batteries at some point.
Aspen Trail 2710BH | 470 watts of solar | 2x 6V GC batteries | 100% LED lighting | 1500W PSW inverter | MicroAir on air con | Yamaha 2400 gen

Crazy_Ray
Explorer
Explorer
Some people use over kill in their answer. JMO. as you see I have 530 watts of solar. can't help you but keep looking on the search mode. Happy camping
RET ARMY 1980,"Tiny" furkid, Class A, 2007 Bounder 35E, Ford V10 w/Steer Safe, 4 6V CROWN,GC235,525W Solar Kyocera, TriStar 45 Controller,Tri-Metric 2020,Yamaha 2400, TOW CRV. Ready Brake. "Living Our Dream" NASCAR #11-18-19-20- LOVE CO,NM,AZ

Jfet
Explorer
Explorer
woodhog wrote:


We were always told to discharge lead acid batteries to no more than 50% of capacity or damage would result..??


If so then why does Lifeline recommend a full battery drain down to 10.5V when you are checking capacity?

Cycle life IS reduced when you consistently drain below 50% but it isn't instant battery damage (as long as you don't leave the battery in a discharged state).

I think Lifeline publishes 500 cycle life if you drain 80% of the battery consistently. 500 cycles is still about 5 years of camping every single weekend.

woodhog
Explorer
Explorer
cruiseruser wrote:
We were newbies to boondocking and I had a large double slide truck camper with two 12v batteries. We were constantly worried about not having enough power when out and about for any length of time. We always would immediately turn off all lights, pumps, tv, etc.
It came time to replace the batteries. We were told to cycle the batteries down to nothing and then fully recharge. We turned on EVERYTHING that had any current going to it (lights,frig,inverter,two fans,tv,stereo) you name it.

SEVEN DAYS LATER... everything was still running!! Never worried about power again!!
Keep the genny, just in case!

Good luck. Worry less-enjoy more!!!!


We were always told to discharge lead acid batteries to no more than 50% of capacity or damage would result..??
2004.5 Dodge 4x4 SRW Diesel, 245/70R19.5 Michelin XDS2, Bilstein Shocks
Torklift Stable loads, BD Steering Stabilizer Bar, Superchips "TOW" Programed,Rickson 19.5 wheels

2006 8.5 Northstar Arrow, 3 Batteries 200 Watts Solar,
12 Volt DC Fridge.

bcbouy
Explorer
Explorer
tonymull wrote:
LED lights, AA powered CO2 detector and smoke alarm. Don't run the furnace except for a few minutes to warm up in the morning and then your only drain will be the small amount the refrigerator fan uses. If you need a microwave, hair dryer,and coffee maker....I wonder why you are camping at all.
wow,who said anything about all that.i know i said all opinions were appreciated but thats uncalled for.fyi when i camp i dont have a microwave,tv,stereo and i'm mostly bald.i need battery power to run led lights mostly,and the water pump.if you read my original post you'd have noticed i never had a battery.your post has no info that i was looking for at all.
2012 ram 2500 hemi crew cab sb 4x4 2015 northstar 850 sc 14.5 g3 guide custom fly fishing boat

mbloof
Explorer
Explorer
Besides my Monthly trips, I used to spend a week dry camping in the summer.

Your 12v power draw will usually go something like this:
- Furnace
- Whatever your plugging in
- Lights
- Water pump
- Parasitic loads (smoke/leak detector, exc.)

We found that if we just used the furnace for a while before going to bed and a while just after getting up we could save a bunch of power.

I used to plug in an inverter to charge an old power hungry laptop. I now have a less power hungry one and a DC/DC converter to charge it.

Old style CAR bulbs use an ENORMOUS amount of electricity. Back in the day I designed and built my own 1/2W LED replacements. These days there are 1W & 2W commercial models that put out a lot of light!! With LED's if you just turn on the ones that you need when you need them, they don't draw much power overall.

Personally I don't worry to much about the parasitic loads or the water pump, its not like we're pumping water all day+night.

Here's what I recommend. Get yourself a Digital Volt Meter. These can be had for 3-7$ at Harbor Freight or many home improvement or hardware stores.

There are a number of lead acid battery voltage=%capacity used charts on the internet, find one and copy the numbers down for reference.

Go camping in your TC just like you would normally but this time measure the battery voltage when you start camping, then just before bedtime and when you get up in the AM and finally after 24hrs of camping.

It is recommended that lead acid batteries are only discharged 30-50%. So your first reading (when you got there) hopefully verified that you have a mostly full battery. The measurement just before bedtime hopefully showed that you have enough energy to make it through the night and when you measured in the AM it hopefully not only confirmed that you had enough energy, but hopefully enough to last the full 24hrs after starting.

The idea here is that worse case your battery voltage should never drop below +12.1V. (50% charge) You may of dipped down to +12.1V fairly quickly or after 24hrs not at all. Now that you have an idea of your energy use you just have to ether add AH capacity so you can meet your total hours dry camping or use less power or add another power source to charge your batteries.

My 1st camper came with automotive bulbs and a type #24 battery. I could barely last 6pm-6am without starting my truck to recharge in the mornings.

tonymull
Explorer
Explorer
LED lights, AA powered CO2 detector and smoke alarm. Don't run the furnace except for a few minutes to warm up in the morning and then your only drain will be the small amount the refrigerator fan uses. If you need a microwave, hair dryer,and coffee maker....I wonder why you are camping at all.