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Open Roads Forum  >  Tech Issues

 > Camping 3 months with single 100Ah Lithium

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Kayteg1

California > Nevada

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Posted: 10/31/21 01:13pm Link  |  Quote  |  Print  |  Notify Moderator

How much lithium battery weight?
They sure are technological future, but at present cost -not much economical.
I am not young anymore (regardless how I feel mentalny) but I can still lift the battery from my sedan and put it into camper when going on vacation.
Making it free power storage and less worry about battery sitting in my sedan for months without checking.





S Davis

Western WA

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Posted: 10/31/21 01:36pm Link  |  Quote  |  Print  |  Notify Moderator

Kayteg1 wrote:

How much lithium battery weight?
They sure are technological future, but at present cost -not much economical.
I am not young anymore (regardless how I feel mentalny) but I can still lift the battery from my sedan and put it into camper when going on vacation.
Making it free power storage and less worry about battery sitting in my sedan for months without checking.


The 280ah battery pack I just put together is a little over 50lbs.

280 ah battery pack.

jaycocreek

Idaho

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Posted: 10/31/21 06:01pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks for the update Ralph..Do you use the Victron default lithium mode or put your own parameters in it?

As to lifepo4 100ah batteries cost and weight,right now for $329 you get 100ah and the weight is listed at 25#..


Lifepo4-380ah/Lithium NMC-140ah/Solar-400 watts/Wagan & Giandel PSW/Engel & Iceco 3-1 compressor fridge freezer/5K Window AC/Honda 2K

bighatnohorse

Gig Harbor - Cave Creek

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Posted: 11/01/21 08:18am Link  |  Quote  |  Print  |  Notify Moderator

Thanks for the report. I looked into the AmpereTime 100Ah 12v LiFePo4 and found the price / performance very attractive.
However, reviews state that the battery does not have low battery cutoff and can be damaged by charging below 32 ° and while we try to avoid climate extremes temperatures are not an obstacle.
Our present camper has a Zamp solar controller which, to my knowledge, doe not have low charge voltage cutoff.


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StirCrazy

Kamloops, BC, Canada

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Posted: 11/01/21 09:07am Link  |  Quote  |  Print  |  Notify Moderator

Kayteg1 wrote:

Good report, although I think the title is misleading.
You camped 3 months on solar power, where battery was just a storage and it did not matter if that was lithium, or lead-acid.


I am not sure i agree, yes he camped with better solar but he also improved is solar storage.. so the one day he used 30% of the availble AH, with the original batteries he would have used what 60%? and the recovery each day would have been longer so I do think the batteries are part of the story also. so ya maybe the title should mention them and the solar..


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ajriding

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Posted: 11/01/21 09:07am Link  |  Quote  |  Print  |  Notify Moderator

The general thinking is that the Li batteries can use all their power and lead batts can use about half. SO a 100ah Li batts gives you the same use as a 200 ah lead battery that should not be discharged past 50%.

All my devices that use Li batts can be fully discharged and charged back (one cycle) around 1,500 times. I think these big batteries have fewer cycles, but one cycle is a lot to do in one day and hard to do unless you run a furnace the whole time.

If a laptop runs the battery down in 3 hours you have big problems. Look at your little laptop battery and look at your big 100ah battery. Those little laptop batts can run a laptop for 6-8 hours or so, so, how are you running your camper battery low? not make sense....
Something else is draining it, or you are starting with a low camper battery to begin with.

The worry about recharging below 32 degrees is real, but in reality, if your batt is inside, then how often is it going to get below 32? Keep the rig warm and the batt where it can stay warm from the rig and then you can recharge. This will be different for everyone.

noteven

Turtle Island

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Posted: 11/01/21 10:02am Link  |  Quote  |  Print  |  Notify Moderator

Question for the Pendantic Police:

If I posted “went camping for 3 months with a left front tire on my truck” without specific details of the attachments, spindles, the other tires and wheel

Is that just the one infraction of the three of them?

ticki2

NH

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Posted: 11/01/21 02:26pm Link  |  Quote  |  Print  |  Notify Moderator

So let’s add to the informative discussion by comparing a sedan starting battery with a 100ah lithium and call it equal .


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EYEMLOST

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Posted: 11/01/21 02:44pm Link  |  Quote  |  Print  |  Notify Moderator

Ramblin' Ralph wrote:

Before I started ramblin' this summer, I replaced my two lead acid batteries with a single 100 Ah lithium. I also added a second solar panel to go from 125w to 225w.

I was on the road almost five months, and three of those were dry camping every night. Usually at the end of the day my battery was down to around 90%. The next day it was quickly up to 100%. On Labor Day weekend I camped in a shady spot for four days. At the end of that my battery was down to a little less than 70%. It took a couple of days to get back to 100.

I don't have any high power devices on my camper. My furnace draws the most, at 4 to 5 amps. I only ran it for about 15 minutes in the morning, when needed. All my lights are LED. My fridge was running on propane the whole time. I installed a DC-DC converter before I left home, but never used it.

FYI, my setup is a single AmpereTime 100Ah 12v LiFePo4 ($540 last Jan when bought and $400 now, on Amazon), 225w of solar panels, Victron MPPT 75/15 solar controller and battery temperature/voltage sensor, and an eBay purchased battery monitor that records amp hours. Turned out the battery doesn't have low temperature charge protection, but the Victron solar controller takes care of that.

I'm very happy with my installation and doubt now that I'll ever need other than my solar charging. Now I don't have to remember to check battery water and strain my old body to lift a battery. [emoticon]


Informative post; thanks for sharing.


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jaycocreek

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Posted: 11/02/21 06:18am Link  |  Quote  |  Print  |  Notify Moderator

What a couple people are missing is this is the truck camper forum where weight and space come at a price..Some truck campers only have room for one battery like mine...I have room for one group 27 battery at 64# and 50 usable amp hours..Should I replace that with my 120ah lithium battery, I would gain 70 amp hours and lose 35# in weight plus be able to charge it 100% in 4-5 hrs via 20 amp charger or to 70-80% without any harm time after time..

One 100ah lifepo4 battery in a truck camper, as Ralph posted, does the job of two group 27 AGM batteries and is over 100# lighter with 8-10X the cycle life..

Ralph did good for those that understand..

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