Edited by Stokeme, 20 July 2020 - 04:30 AM.
Low cost DIY Lithium camper batteries.
#191
Posted 12 April 2019 - 07:56 PM
#192
Posted 12 April 2019 - 09:50 PM
Thanks for your feedback on those panels. They have a 200W model for $240 also. I was think of wiring it 24v (better for long extensions) and using MPPT.
Also, I just ran across this site: https://batteryblocs.com/batteryblocs/
It might be of interest to someone using individual cells. I think it will work on the ones mentioned in the OP.
Edit: Doh! No they won't fit. Our cells are 32mmx70mm.
Edited by rruff, 28 April 2019 - 01:07 AM.
#193
Posted 12 April 2019 - 10:23 PM
That would have saved me a number of hours soldiering all those cells together!
2016 Duramax 2.8 Diesel long bed Colorado 4WD with 2011 Eagle
#194
Posted 15 April 2019 - 08:14 PM
I am corresponding with battery manufacturer now. The 100AH batteries are sold out. They do have 90AH battiers available. I have attached the spec sheet. Price per piece is $40USD and Door to door shiping to SoCal is $168USD. For a 180AH (8pcs) delivered would be a total of $468USD or $2.71/AH
CWD... did you end up getting these? I am getting closer to buying batteries for the next build, and seriously looking at LiFePo. I need about 300AH because the wife wants an Induction Cooktop (1800W = 144A draw on high!)
I spotted these guys on Alibaba, https://www.greensun...attery_p62.html
and frankly, I find shopping there rather intimidating.
Any leads anyone has on DIY or pre-built would be most welcome!
2012 ATC Puma Shell build - https://www.wanderth...012-puma-build/
Power considerations thread - https://www.wanderth...e-power-scotty/
Building out an electrical system - So, you want to setup a good electrical system in your camper? - Electrical, Charging, Solar, Batteries and Generators - Wander the West
#195
Posted 15 April 2019 - 09:30 PM
Vic,
As I recall Alley Kat had an induction cooktop in his camper at one time. You may want to contact him for his experience as I think he has removed it now but I cannot recall why.
Regards,
Craig
1993 Dodge Cummins W-250 Club Cab long bed, 2007 FWC Keystone
#196
Posted 16 April 2019 - 04:58 AM
I still get about 4-8A of charging out of my alternator, even at 13.5V, so I wouldn't totally write off alternator charging. It is way less current than you could get out of the alternator, but is about the same as winter time solar charging.
Another inexpensive option I think I mentioned earlier would be to add a DC-DC converter and wire the output to the input of solar charge controller (assuming an MPPT charge controller). Something like this would get you at least 20A of alternator charging if your MPPT is rated for it:
https://www.amazon.c...boost converter
With 2 blocking diodes (one on the DC-DC converter and one on the feed from your solar panel) you wouldn't even need a switch or anything - it would just work whenever the alternator is running.
rando, can you add a bit of info to this idea? I get that the blocking diodes prevent pushing voltage back into the PV array. What I don't get is how the two "inputs" 1) PV and 2) alternator output converted to 24V by that Uxcell --- are connected.
Would you put them in parallel? If so, how would the Victron MPPT (100/50 model) react as it tries to manipulate the input load/current to optimize the output of the PV array, which is now in parallel with an entirely different kind of output device?
Not to mention my confusion about the spec's on that Uxcel... last I checked 30A at 24V = 720W, not the 360 that Uxcell device is listed as being.
I've also tried to find out what I can realistically expect my alternator to put out. As we've noted before, it is kinda "spicy". I believe I have a 145A alternator, and have seen it dump 80A into my AGM batteries, but only for a short time. LiFePo batteries could suck in more, and for longer. That Uxcel would limit the current... so something like 30A (if it is a 360W device). Would that be a level the alternator can sustain for a full day of driving (plus all the other stuff that it has to keep running as well)?
2012 ATC Puma Shell build - https://www.wanderth...012-puma-build/
Power considerations thread - https://www.wanderth...e-power-scotty/
Building out an electrical system - So, you want to setup a good electrical system in your camper? - Electrical, Charging, Solar, Batteries and Generators - Wander the West
#197
Posted 16 April 2019 - 06:19 AM
CWD... did you end up getting these? I am getting closer to buying batteries for the next build, and seriously looking at LiFePo. I need about 300AH because the wife wants an Induction Cooktop (1800W = 144A draw on high!)
I spotted these guys on Alibaba, https://www.greensun...attery_p62.html
and frankly, I find shopping there rather intimidating.
Any leads anyone has on DIY or pre-built would be most welcome!
Vic, I did not. I set up an account with Alibaba a few years ago, but have never purchased anything from them, but I have purchased quite a few items from Aliexpress and they are essentially the same company. Alibaba is more business/wholesale and Aliexpress is retail/individual. I would buy from either without worries. Sometimes I get delivery faster from China than from across the USA
You know....it's not just the 1800W Cooktop. Then you need a bigger fridge to carry the extra food and ingredients that needed for the Cooktop. And the food processor to prepare the ingredients, pluss the vacuum sealer for the leftovers from said Cooktop. The waffle maker, don't forget the waffle maker! I'm thinking 500Ah!
Edited by cwdtmmrs, 16 April 2019 - 06:29 AM.
#198
Posted 20 April 2019 - 04:25 PM
Hello again rando !
Attached Files
2016 Duramax 2.8 Diesel long bed Colorado 4WD with 2011 Eagle
#199
Posted 11 May 2019 - 10:50 PM
I still have yet to attach the battery management monitor. Does this need to be done first?
IMG_4342.JPG 97.19K 29 downloads
2016 Duramax 2.8 Diesel long bed Colorado 4WD with 2011 Eagle
#200
Posted 15 May 2019 - 04:00 PM
You don't need a tender for LiFePo4, and I wouldn't charge it without monitoring the voltage.
Also tagged with one or more of these keywords: Lithium, LiFePO4, LFP, DIY, Batteries
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