Lithium Batteries on Sale

BC Coast Pilot said:
Costco has good AGM'S for half of what most retailers charge. Can most likely get a new AGM for the price of a used.
I put in 31 series marine AGM at 289 each and am very happy with the performance
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Yeah I grabbed one when I redid my electrical a couple of years ago. It really has been great. Now their group 24 agm is that price. Still a good choice for starting battery and not needing the complication of a dc-dc charger. At the time lifePO4 were more expensive and I went for a Victron smart shunt for monitoring the batteries.


 
I'd suggest keeping an emergency starting jump starting battery on hand.. this is not that.

The BMS on this might fault out if you try to start off of it, on over current.

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kaelc said:
Amazon Prime days tomorrow. This battery, which I've been running in my camper, is already priced at $280.99 after the coupon $80, which might be even more on sale tomorrow. Pretty happy with it, but I still have another solar panel to install and having two to replace my two heavy lead acid deep cycles would be nice. #ad https://amzn.to/3Y3rSYT
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Thanks for the heads up. AGM in my trailer is getting tired. Been waiting for a sale to replace. Will definitely grab one of these. Will be interesting to see if it actually goes on sale, or if they’ll jack up the price and then discount it equally 🤣
 
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I put a lithium in my travel trailer. RV tech said there is no issue charging from my truck alternator while driving.
 
Samnjoe said:
I put a lithium in my travel trailer. RV tech said there is no issue charging from my truck alternator while driving.
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Pretty sure my truck will only charge my RV's lithiums to 80-90%. The charger in the trailer also will only charge to 80-90%, but the solar panel is set up for lithium so keeps it at 100%. Either way, the solar was able to keep the batteries at 100% at allouette lake with lots of tree coverage for my first camping trip with the travel trailer so I'm happy.
 
You need a charger or alternator that can charge with 14.6V for fully charging a Li battery. Normal lead-acid chargers only charge with 13.6V which will not nearly achieve 100% capacity in a Li battery.
 
Corey_lax said:
Pretty sure my truck will only charge my RV's lithiums to 80-90%. The charger in the trailer also will only charge to 80-90%, but the solar panel is set up for lithium so keeps it at 100%. Either way, the solar was able to keep the batteries at 100% at allouette lake with lots of tree coverage for my first camping trip with the travel trailer so I'm happy.
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Same..90% is pretty good.
 
chris73 said:
You need a charger or alternator that can charge with 14.6V for fully charging a Li battery. Normal lead-acid chargers only charge with 13.6V which will not nearly achieve 100% capacity in a Li battery.
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Lower capacity... but longer lifespan as a result?
 
macro said:
Lower capacity... but longer lifespan as a result?
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There may be a bit truth to that but the newer generations Li batteries have come a long way from earliers and can now easily provide thousands of full charging cycles with little capacity loss. The problem with Li batteries is that it is very difficult to measure charge status. Some here guess that their truck alternator may charge to 90% but there is no way to tell. It could easily be only 60%. Unless you start counting used Amps you can't measure because unlike lead acid batteries, Li batteries don't have a gradual Voltage loss when being used. Li batteries operate literally with full 14.6V right up to the moment their are depleted. So, if you charge a Li battery with an old 13.6V charger/alternator you just cannot nearly achieve a full charge. It might be nearly empty still but your charger will stop and think its done.
 
chris73 said:
There may be a bit truth to that but the newer generations Li batteries have come a long way from earliers and can now easily provide thousands of full charging cycles with little capacity loss. The problem with Li batteries is that it is very difficult to measure charge status. Some here guess that their truck alternator may charge to 90% but there is no way to tell. It could easily be only 60%. Unless you start counting used Amps you can't measure because unlike lead acid batteries, Li batteries don't have a gradual Voltage loss when being used. Li batteries operate literally with full 14.6V right up to the moment their are depleted. So, if you charge a Li battery with an old 13.6V charger/alternator you just cannot nearly achieve a full charge. It might be nearly empty still but your charger will stop and think its done.
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Most manufacturers make a blue tooth enabled lifep04 version for $25 to $50 more or you can get a cheap or expensive victron shunt that will give you a good idea of what it's been charged to or depleted too. The noco and victron battery chargers are pretty affordable and are all lifep04 comparable these days so worth the upgrade if you already have onboard charging. Prime Days are coming up so Noco and others will be on sale. This is what I went with https://amzn.to/44muXEG #ad
 
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