12V Lithium (LiFePO4) Masterclass - Everything you need to know Pt1

Sit back, relax and get ready to find out everything you need to know about Lithium Ion and Lithium Iron Phosphate LiFePO4 12V batteries with our resident 12V expert Cahn. Lithium batteries offer a couple of huge benefits over typical lead acid batteries including the fact that they’re super lightweight, they have a high energy density (lots of power in a small package) and they have a much longer cycle life.
In this video we cover the difference between different types of Lithium Ion and Lithium Iron Phosphate batteries, the difference between LiFePO4 and AGM batteries, how Lithium batteries ‘work’ and how to get the most out of them including charging and storage tips. Finally we cover what to look for when doing your own research and focus on how important it is to get a battery with a high quality Battery Management System or BMS.
Follow Cahn's adventures here: / cahnturner
If you’re keen to update to a LiFePO4 setup in your vehicle, make sure you check out the Adventure Kings 120Ah Lithium Battery: bit.ly/2YcWomo and the Adventure Kings 200Ah Lithium Battery: bit.ly/3q33iWO
To check out the full range of Adventure Kings Lithium and AGM batteries click here: bit.ly/3q5j4QY
Make sure your Lithium Battery is being charged properly with a Kings Lithium Compatible DC-DC charger: bit.ly/3wmgt6A
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► OTHER VIDEOS YOU MAY LIKE:
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• Off Grid 12V Battery Masterclass: bit.ly/3c8uICO
• Solar Regulators Explained: bit.ly/3fBvXNd
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*NOTE: This description contains links that allow you to find the items mentioned in this video. Thank you for your support!

[@CalaisRider]

Greatest presentation I've see on Lithium batteries. Thanks for taking the time and sharing your knowledge

[@odnewdylee]

I operate a lot of equipment out of my work truck. This is the only channel I can find with similar topics. Thanks for the videos.

[@youreanuncoordinatedcuckcu7812]

Clear, concise and well illustrated. Thank you.

[@darrylmunro96]

Most informative and concise explanation I’ve see so far. Extremely well presented, supported with easy to read and understand graphics. Keep up these awesome videos/topics. I just went out and brought a 120 Kings lithium battery because I felt better informed about the product and felt the price was more appropriate than competitors. Well done!

[@captainbabossa2628]

I’ve been trying to keep my lithium at a 100% Wrong ! Now I realised; thank you for the great video 👍👍

[@peterreisinger3459]

Everyone with lithium batteries should watch this if you want the best life for your batteries. Awesome information!!

[@0guiteo]

Thanks. This was very informative. I live in New Jersey - and it occasionally gets pretty cold here. I keep my LiPo battery in the basement along with an AGM and an inverter (and a bunch of other stuff) in case of losing electricity. I really learned a lot from this presentation, including not keeping the LiPo battery on the trickle charger like I do with my AGM battery.

[@javahead8]

Terrific comprehensive lecture - full of info.

[@Funcentric]

This was all very good and very relevant. I learned more in less time with your video than the previous 20 i've watched. Good job.

[@rogerbarker165]

Cheers mate, that explaination was brilliant !

[@robbief1]

Excellent Video - Well Done! Gives you the sense you really know what would make a successful / reliable battery!

[@AlpeshPatel-jh5ti]

Love the series of videos. Really well explained

[@clarkvalcoic1736]

Fantastic informative video , Has all the info I needed but didn't know how to ask for.

[@justcruisin109]

This was very informative. Appreciate the effort you went to to make this. Cheers

[@jasonyannuccelli2499]

Mate I love the level of detail you put into your videos. For some people it might be too much but for my brain it’s like good food thank you so much 🙏

[@JohnathanPrice-Williams-el5ki]

Ecclesiastes 9:10

[@garywinkworth3380]

explained beautifully thanks mate.

[@PandorasBox2]

damn one of best video ive ever seen about lifepo4 tnX man

[@danielb8901]

Fantastic explanation the best I have seen congratulations.

[@Leerox1]

Quality content, brilliant!

[@LiquidAudio]

Really great video guys, loads of useful tips there.

[@gregclaydon6727]

Best presentation I have seen to date..very knowledgeable and easy to understand..thanks

[@jeoffer]

Best explanation I have seen.

[@grahamwhittaker8844]

Thanks for that , awesome clip ,much appreciated 😊😊🐕‍🦺👍🍺🦘🐨🇦🇺

[@johnmettam1573]

Excellent video and information

[@andrewvillavicencio8496]

Excellent explanation, thank you!!

[@4wdsupacentreAu]

Glad it was helpful! Thanks for the comment! Cheers, Cahn

[@samartz]

Wasnt going to watch this but learnt a lot!

[@brucemcnair2]

Great presentation. Thanks

[@VideoShowMeHow]

Some good info here - thanks for the upload guys! Any plans for other size/AH in the lithium range?

[@WesternAustraliaNowAndThen]

Very interesting and informative.

[@lukerobins6850]

Great video. I was hoping to get more detail around charging. I have the Kings 120 AH Lifepo4 and a kings 25A DCDC charger and also a victron 12/15 smart charger. I'm wondering firstly, is it ok to leave my battery permanently connected to the DCDC charger? I've tracked the voltage supplied to the battery when fully charged, and it seems to supply more of a absorption level voltage (14.6V if I recall correctly) when I'd expect more of a float charge, say, 13.4V. Is the DCDC working correctly? Also, what are the best bulk, absorption, and float charge voltages for these batteries? I find the package insert with the battery was low on detail, and indicated a very high float charge, over 14V as I recall. Any ideas out there? Would love to hear from the channel on this. 🙏🏼

[@gwynneclark6372]

One of the best description of the difference between lifepro4 and agm batteries ,very well done and thank you for sharing your knowledge .

[@1989cranston]

There are literal electrical engineers videos explaining it and you somehow think 4wd supacentre made a better video hahaha. Hilarious

[@gwynneclark6372]

Nick Cranston I can’t see any of your attempts of explaining any thing ,your comments I find to be offensive please keep your silly childlike remarks to yourself .

[@slaavichii1129]

Kings Lithium. Sold. Awesome channel

[@jdoe4548]

perfect explanation

[@jerryallen34]

Excellent and thank you for taking the trouble to put up such an informative video.

[@ShanoShanmugalingm]

Great informative vedio. I am interested in the 200Ah battery. Does the current DCDC charger support this? Also it would be great if there is a battery box for the 200Ah battery.

[@CrazzyRandy]

Can you use Lithium battery in the engine bay as a second aux battery instead of AGM? Is temperature a problem in engine bay?

[@ryanminer1253]

Great video very helpfully. I have a question you Mention about hooking it up to a DCDC charger. I have a DCDC charger which is not a dedicated lithium DCDC charger will it support this battery or do have to change the DCDC charger.

[@fatmanoverlanding]

Great stuff 👍 Now you just need to also sell high quality battery boxes with built-in high quality DC-DC Chargers and MPPT Solar controllers. A much better quality than the flimsy basic battery boxes you currently sell. This is an opportune time for me, as I'm in the market for a lithum battery to replace my disasterous BainTech PowerTop V3, that only lasted 18 months. So I hope you also have a new range of better quality battery boxes coming. Including for the 200Ah Lithum battery you have shown here. 👌

[@HammerRocks]

A superb and extremely informative video. Learning about the different compositions of Lithium is handy. 👍Are you also releasing new battery boxes to fit these new range. Interested in the 200Ah but would look at getting a battery box with it. Having it with a built-in DC/DC charger would be enormously handy too. 🤞

[@4wdsupacentreAu]

Hey mate, No battery box yet, but stay tuned on our website. I'll let the team know of your interest! Talia

[@HammerRocks]

@@garyreed354 Do tell...

[@joevanniekerk2858]

Like to know what the possibilities is making a video open up a 100AH /200AH Lithium battery to show the internal Bms,wiring and the general workmanship?

[@nickhayley]

I came looking for the state of charge voltages for lithium batteries, expecting it may not be covered. I was pleasantly surprised.

[@michaelsweeney3241]

This bloke knows what’s up!!

[@michaelsweeney3241]

I’d love to see a tear down video of these batteries

[@MJ-yv9il]

Pity it has such low discharge rates

[@merkel2750]

Do you have any charge profiles available for us to go over?

[@cameronbennier]

Well done

[@simonwaite5815]

Great presentation with a lot of info to absorb. The percentage charged is confusing and its impact on the BMS. At 10 volts my BMS shutdown, but the battery protection on the Kings 90l fridge goes as low as 9.6 volts. I used this, and appear to have killed the BMS on my new 120 AH LiPo4 battery. Even on the high setting the protection shuts off at 11.1 volts which is (according to your chart) about 10% discharge of battery capacity. The battery I purchased from 4WDSupaCentre had no documentation with it, is this normal? as I had no real idea of the problems I have caused myself- now I need a charger with a 'wake up BMS' function. Cheers for the presso.

[@recommit]

Can the lipo operate a winch or is that type of current draw excessive?

[@andrewthomas2794]

Thanks this was the best video I have seen explaining lithium batteries and the different chemistry. Does the BMS in a KINGS 12v 300ah LiPO4 battery allow 2 of them to be connected in series to give a 24v output at 300ah?

[@pearcey1113]

Thanks for the information great video, I just rang up and brought the 200Ah my mate told me it’s the best battery and great for the price on sale for $800 I’ll let you know in a few weeks or months what it’s like, cheers

[@fozzy1000]

Very informative! How can you tell when a LiFePo4 battery is either 90% charged and 90% discharged.

[@warren.waters9930]

Great info i need to replace a 170amh slim battery i have 120w solar a 25amp redarc dc/bc charger. Running an old engal would 120amp slim be better/less weight

[@ripperracer]

My equipment installed Kings lithium 120 amp Battery Kings 25 amp DC DC charger mk 2 lithium Kings 160 watt semi flexible solar x 2 in parallel Victron 712 Smart Battery monitor Question - should the DC DC charger shut off when 13.4 volts is reached as this is what you have recommended in the video, it's currently at 13.55 and still putting power into the battery.

[@BM-wi9kt]

Thanks for video. Pity the kings ebay store are pairing the 3000w inverter with the 200a battery where it should have 2 x 200a battery to cover the current draw. A 2000w would be better matched. Thanks again

[@jacquesb5248]

would the bms in those kings batteries take care of charging them fully or to 99% and same with discharge?

[@danc8946]

Awesome video and great to see Kings getting into the lithium tech! Are you going to release a solar blanket that will work with lithium batteries in the near future?

[@4wdsupacentreAu]

Hi Dan, There are no current plans for this, however we appreciate the interest! Hopefully we can add this to our range in the future. Talia

[@sky73x]

I use a Kings solar blanket with a Lithium battery no worries. Presuming you've got a DCDC that doesn't have solar input? Lithium battery + Solar blanket/panel + Kings 25A DCDC is what you're looking for. Ditch the MPPT controller that comes with the solar and use a solar compatible DCDC.

[@HORTOJM]

Quick Question, can you put 3 of these in Parallel, say in a camper trailer. If so what are the minimum/recommended charging requirements? ie amount of AMPS? Thanks.

[@steveturton1425]

I’m using a Redarc BCDC 1225D charger. I know it will charge lithium batteries but possibly to 100%, will this be a problem and significantly reduce cycles?

[@davesmith5855]

Sweet AS !

[@benchampion4086]

Would you recommend a Lithium battery for a camper or small trailer I live in South Texas where it is hot 90% of the time.

[@coryanderson2371]

So which one should I go to the ones you're talking about and I guess so that part panel is I'm putting on my truck and I'm gonna watch eand I haven't got a black cheek and I haven't got everything done yet but I haven't got batteries yet either let me know if you get Your show is great and I like it I get to learn more

[@blairvigil1633]

I learned something today but its still alot of info question what battery type would be best for a class 8 truck in North America to run a A/C system and heater and other hotel loads we can be in 120 degree weather one day then go north to -40 bellow zero so what battery bank would be Best???? Thanks

[@andyjack2368]

nice video my question is how will lithium battery work out side in cold weather working runing power told on job side

[@kingchief4038]

Would you need an AGM as a second battery plus a lithum portable battery or is that overkill for running a fridge.?

[@JOSHJJ807]

what about running 5 of those 3.65v cells and having the charger cut once it reaches say 14.8v 85%+- in the interest of having more "storage" and a more stable voltage for longer or would this eventually start damaging things if it doesnt see 18v every once in a while?

[@moolkau]

Great video. I've since bought the Kings 120ah Lifepo4 battery. Since the kings mppt charge controller isn't compatible, are you able to list the recommended parameters to use with another MPPT charge controller? Most importantly- Bulk Charge Setting: ? Float Charge Setting: ?

[@rodgerames677]

Buy a Victron

[@martyntemple9135]

if I have a 25A kings dcdc charger mk2 but it is currently hooked up to an AGM, can I remove the AGM and replace with a Lithium by changing the wiring to the grey wire on the dcdc charger? or is it fixed to whatever battery type you first set it to (in this case the AGM configuration) and would I need to buy a new dcdc charger?

[@user-nd2nx2fm8d]

Hi there Cahn, should I fully charge (100%) my new 300amp lithium kings battery before I start using it and then keep it between 80% and 20%?

[@bvic3785]

Great overview and one piece of information I would really appreciate is how to keep the lifepo4 below 30 degrees when sitting in a parked vehicle on a hot day. Specifically, I have a 120 amp lifepo4 in a battery box I built supporting 12v/240, MPPT, DC-DC charger, inverter, shunt etc. The one challenge left is how to keep the battery cool when parked on a hot day. I've thought about using a closed circut liquid cooling system used in gaming PCs, or perhaps an evaporative portable cooling system. However each of these solutions as problems/limitations. Any ideas on a suitable cooling system that I've proposed or something else would be greatly appreciated.

[@JoelTheGamer]

Is your canopy insulated?

[@bvic3785]

@@JoelTheGamer Hi, thank you for the reply - I'm thinking about a passive cooling approach such as the insulation your suggesting. The box is in the back of a Pajero Sport (so no cabin). However, I looked at a company in QLD that custom makes quality solarscreens for all windows for about $400 so I might go for that option first as it would handy the whole vehicle cool anyway and not just the battery as there are other electronics such as fridge, computers etc.

[@JoelTheGamer]

@@bvic3785 that and seeking shade as often as practical would be the most effective. You could try and insulate the roof of the cabin if heat is still causing you issues.

[@Doug4651Mac]

Great video. I have a question about storage. I have a 120ah Lithium installed into my canopy that is permanently hooked into a DC to DC charger. When on the road (Caravan hooked up Ect) I have a 75 Ltr Fridge and use the connected inverter often. When I am home and using the car locally, the fridge is turned off and there is nothing running off the battery so the DC to DC charger is still topping up the battery each time I run the car. Should I consider unplugging the DC to DC charger while only travelling locally without anything draining the battery?

[@TrickedHat]

I think the dcdc charger will just not charge it if it's full

[@doggies42]

Can you guys expand on if these can be run in parallel for both the 100 and 200 amps and by how many as i cant see this on your website and are these imported from china or made in Aus

[@miro_s]

Thanks for the excellent video. I’m used to AGM batteries for motorcycles. As they can sit unused for weeks, I constantly keep the battery under trickle charge. I’m confused as to what is best practice for LiFePo4 batteries in the same scenario: leave them be (anyway they have low discharge) or use a specialised trickle charger? And in the second case, some chargers have a specific “LiFePo4 mode” others just a generic “lithium mode”. Are these different? Do I risk damage using “lithium mode” for LiFePo4 batteries? Thanks for any help.

[@bruceskousen5451]

You are not going to damage your lifepo4 battery with a conventional charger. It just might take longer for a full charge. Some chargers have an equalizer mode. Lifepo4 batteries do not need/use this mode. Sometimes the equalizer mode goes above 14.6 volts, which isn't good for lifepo4 batteries, but the battery's BMS should shut down any charge input once the battery is fully charged. If you plan to not use your lifepo4 battery for a while, it's best to keep it at 50-80% charged (50% is the ideal range).

[@nordic5490]

@@bruceskousen5451 you should definitely not charge a lithium iron phosphate (LFP) battery with a conventional charger. Charging above 3.4v per cell will shorten the life of that cell. The conventional charger cannot monitor individual cells, amd will not balance the cells. What happens is, not all cells are equal. One cell will reach the max allowed 3.4v before the others. However, the total combined battery string voltage has not yet reached the 'max battery voltage, and the charger keeps on going, when it should have throttled back. Now that cell goes over voltage. Because that cell suffers degradation, its internal resistance can increase, and its capacity to take charge decreses. Both things lead to the 3.4v being reached even quicker next charge cycle, even earlier than last time. Eventually you have a dead cell. I know someone who did an ev conversion 10yrs ago, and I asked him why he hadnt installed cell balancing during charging (standard fare for Lithium anything in the RC world). "The kit supllier said it wasnt necessary". I warned him about wrecking a cell quickly, and that was exactly what happened. A very expensive mistake. We are talking several $k.

[@bruceskousen5451]

@@nordic5490 a conventional charger is NOT going to hurt a lifepo4 battery. It’s just not very efficient. The BMS in a lifepo4 battery has overcharge/overcurrent protection built in and will shut it down before any damage could occur, unless, of course, the BMS is defective…

[@qchatgreg]

having difficulty finding details on the BMS ratings as used in your 120Ah 12V liefpo4 battery. speciifcally i want to hokup 3 in series to power a 36V trolling motor for a boat. im aware the BMS voltage rating has to be suitable for >36V in this circumstance… pls advise details for the BMS. also any recommendations and suitability for using above battery in a series configuration. (perhaps a future video topic -musing lithiums in series and parralell) thx

[@jdfloats]

love to have these fitted to my new mt1 camper

[@4wdsupacentreAu]

Hi Dave, Feel free to get back in touch with your trailer rep, they might be happy to help you out. Talia

[@francismcclaughry3794]

my question will they hold charge over a period of time? I have a lithium battery actually two. an Echo flow with two batteries. so far I have not have had to charge it. my camping is in the in the summer. I do keep most of my batteries charged with shore power.

[@markhammond2326]

Chan a great and very informative video. I have a question about connecting LiFePO4 batteries in parallel, if two of these 120Ah batteries were connected in parallel, making a 240Ah battery, can you charge and discharge the combined battery at 200Ah? Or are there other limiting factors that means the charge/discharge rate should be limited slightly, say 190Ah, or 180Ah? Or is the rate simply limited to the single battery charge/discharge rate of 100Ah? Cheers.

[@spartannomad3036]

With lithium batteries you can connect in parallel but they have to be the same type and capacity ( buy them at the same time & hopefully from the same batch)- the limiting factor is the BMS as to how many you can connect in parallel.

[@zeealpal]

One important aspect when using batteries in parallel (especially LiFePO4) if you want to increase your discharge current is to wire them in opposite order on positive and negative, ensuring the same cable length from each battery to the load. E.g: Inverter (+) ==== B1 (+) ==== B2 (+) Inverter (-) ==== B2 (-) ==== B1 (-) Otherwise B1 would supply the greater current and discharge faster as it has the least losses to the inverter.

[@janloots52]

Can i use it in a ups, as mine with the battery (lip) only lasted just less than 2hr. Running a wyfy router and optics. cable box both about less than 2 amps.

[@chrismoore1981]

Hi Guys. Do you know if a new firmware update will be released for the Kings Battery Monitor to support LiFePO4 batteries?

[@sandspiral2009]

Thanks, this was a very informative vid. Don't forget to mic-up your presenter for the next video - this will eliminate the boomy echo, which is a bit of a distraction... :)

[@MrGundawindy]

Looks like he had a mic on his collar. I think it might just be the big mostly empty room.

[@big5astra]

Hi Cahn, great presentation and explanation - well done. 2 Questions: I have 2x 120aH LIFEPO4 Kings batteries. I've been looking at a simple LIFEPO4 charger that runs at 14.6 V (20A) but does not have a built-in tailing off of the current towards the end of the charge cycle. Is this Ok and will the BMS take care of the final charge time to reduce current from the charger? 2). How can you regulate the LIFEPO4 charger to stop the charging at say 95% full level? Do you need a sophisticated charger to do this? Thanks!

[@4wdsupacentreAu]

What chargers are you looking at - if it’s lithium specific it should still be ok Lithium doesn’t need a tailing current it just need constant current (bulk) and then constant voltage (absorption) which will naturally tail off as battery voltage gets closer and closer to charger voltage and eventually equalises. At this point (or near this point) the charger should switch off As for the second question yes you’d need a programmable charger where you dictate the final charging voltage! Cheers, Cahn

[@DasGav]

i just bought the 120ah and battery box, im wondering how do I tell when its fully charged? so i can then start using it? i have the 25amp dcdc and will have it wired in as a 2nd battery with solar

[@4wdsupacentreAu]

The DCDC will indicate the battery is full when it starts a slow flashing pattern on either the alternator or solar light (whichever is connected and charging) So it stays on for 2 seconds then off for 2s You can start using it anytime really - the usable voltage range is ideally between about 12V (10% remaining) and 13.6V (100% charged) As a note while it is actually being charged it’ll reach about 14.5V max! Cheers, Cahn

[@DasGav]

@@4wdsupacentreAu thanks Legend!

[@michaelmain9935]

Gosh, lots of very complimentary comments below. Why is it then that I lost understanding at the 10 second marque? Do these batteries have a on / off switch?

[@derykmacleod4979]

thanks!

[@cyclomad]

Hi , can I connect the 120ah and 200ah lithium batteries in parallel and run a 3000w inverter from the battery bank?

[@davidwicks8054]

You say that if you use the Lifepo4 battery from 100% to 0% repeatedly you would get 3000 cycles. Does this then mean that the AH rating of the battery is useable capacity ? ie @ 80% DOD

[@task82]

Very informative video!! What kind of warranty you offer with your lithium batteries?

[@4wdsupacentreAu]

Hi Mate - 2 Years - Cheers, Ash

[@Epicslats]

What percentage of charge do your lithium batteries come with off the shelf?

[@adrianford1971]

I’ve got 2x 209ah lithium batteries and both after a day charging off a 250w solar panel separately have tested at 13.2v. Will this still be ok to run them in parallel at this voltage?

[@dannybarnes5926]

Hi what charger do tksi need for 200ah 12v battery tks

[@MicckMicck]

What charger (from 240AC) you recommend for 300Ah lithium?

[@jasonjjj43]

wow...they are coming

[@paulpurcell5658]

Can they be used in a tiny house application Paul

[@paulb3214]

Hi Cahn / 4WD Supacentre, I've just bought the 120 lithium with battery box and 200w solar blanket. Is it okay to use the blanket with solar controller to charge battery while at campsite? Or do I specifically need a lithium compatible solar controller and blanket? Great presentation, thank you.

[@4wdsupacentreAu]

Hi Paul, If it's the MPPT controller, it is not compatible with Lithium. If you have the PWM it will be fine Cheers, Mia

[@paulb3214]

@@4wdsupacentreAu Hi Mia, thank you for your reply. It's the MPPT controller that I received with my King's solar blanket. Can you see another way? Could I run it through the kings 25amp DC/DC charger at the campsite, even if the DC/DC charger is not in the car? Or should I just get a PWM solar controller for solar blanket to lithium battery in the battery box at the campsite as will be away from the vehicle? Thank you very much Mia. Paul.

[@4wdsupacentreAu]

@@paulb3214 Hi mate, You can definitely use a Kings 25A DCDC charger - Ideally they should be permanently mounted in the vehicle but you could use one externally. Just make sure it's out of the weather and protected. Otherwise, the PWM is another option. You'd simply connect the blanket to the solar lead, to the PWM and then onto the battery itself. The PWM should be set to b04 in the settings to suit Kings Lithium Batteries. Cheers, Mitch

[@lucysoutdoors]

The term drop in battery=== means can be charged by a standard charger on agm cycle..

[@CMWobby1]

If as you state it’s better to only charge one’s lithium battery to 80% how if it’s attached to a lithium battery charger and a solar controller, and B2B, both of which in my case are Victron, can one limit the charge level. My Kia Niro has the ability to set charge limits but that doesn’t seem to be the case with my Motorhome leisure battery.

[@johnx9318]

Mate. That was a bit good! I don't suppose you have a fact-sheet on the 120a unit? I am after the numbers to put in for a Victron charger. Thanks for this video!

[@4wdsupacentreAu]

Hi there, this information is found in our manual for the premium MPPT regulator under Default Lithium settings. The batteries use the F04 setting. We hope this has assisted

[@johnx9318]

​@@4wdsupacentreAu Thanks - I found the PDF with the numbers!

[@LVNITUPM8]

Can these kings lithium batteries be linked in parallel?

[@collowood]

How do I set up a solar panel with the 200ah lithium battery please 🙏 😀.

[@paulday5164]

Hey Cahn....Is it better to have a lithium or AGM battery as the second/dual in the vehicle with fixed solar panels and dc dc charger as this will likely keep the battery charged to full most of the time? You stated that its better to have a lithium stored at 50% charge. So after a camping trip and the fridge is disconnected for weeks at a time, whats best mate?

[@4wdsupacentreAu]

G'day Paul, LiFePO4 batteries have so many benefits that it's hard not to immediately just say go Lithium... but you've raised some good points! 1. Most DC-DC Chargers that have specific Lithium charging profiles shouldn't have a float setting. So as soon as the battery reaches 100% the unit will disconnect and only start charging again once the battery is discharged again - this prevents the solar from constantly trickle charging the battery at 100% SOC. If you had an AGM in the same scenario, the permanent solar would need to constantly trickle charge the battery for those weeks when it's not in use to prevent possibly damage (sulphation) occuring in the battery. With the lithium the DC-DC charger would probably not even need to turn on in those weeks as the lithium would be sitting at close to full charge anyway. The ultimate for a lithium would be to charge it up before a weekend away, use it throughout the weekend and then if you weren't going to use it for a month or so, disconnect it so it's sitting at less-than-full charge... then charge it up before you next use it! As I said in the video, if you can avoid the very extreme ends of the Lithium voltage range, you'll get the most out of the battery, but even if you were cycling the lithium from 100% to 0% to 100% daily you'd still get ~2000 cycles out of it, compared to probably 300 cycles in the case of an AGM. That's a difference of about 5 years of use compared to 1 year of use! Cheers, Cahn

[@paulday5164]

@@4wdsupacentreAu Hey mate...thanks for the info.....So if I go Lithium, theres no real need to put fixed solar panels on the roof if I have portable ones to top the battery up only when needed? But if I stick with the AGM I have, fixed panels may be the better option so it keeps trickle feeding? I go camping for 1 or 2 nights on average so sounds like either battery (I have 138AH AGM) or a 120AH Lithium would last the whole time just running an Engel and some lights and maybe a few cups of coffee through inverter...In any case, I have the portable 250W solar panel and a 200W solar blanket for backup...does this sound right/adequate?

[@antonheidebrink7716]

dear supa center I want to put a solar installation in my shed, preferably in a thick metal closed or an official fire hazzard closed with a small non-functioning freezer box for battery protection against heat and cold and its rubber band on the lid is non air intake rubber os it is seald last summer we had temperatures outside of 35+ degrees Celsius and in my shed more than 50+ degrees Celsius now in the winter in the Netherlands it has almost never fallen below -10 in recent years now my idea was to use an old non-functional freezer box to insulate the battery`s against the heat and the cold what do you think about this ??? is this a good way to insulate and use it as a firebox? Sincerely, Anton Heiderink

[@lordcmdradama3969]

Good video, what’s the warranty on these batteries - nothing listed on the website. Thx

[@4wdsupacentreAu]

Hi AJ, The product comes with a two year warranty! Talia

[@tucker2074]

Thankyou

[@petervanoosterom2794]

Can these be used as a drop in replacement for a lead acid/agm battery with having to change voltage regulators and chargers given it has a built in BMS?

[@4wdsupacentreAu]

Hi there, With battery systems such as lithium you do generally require an extra level of compatibility in matching batteries and regulators. Cheers, Courtney