Lithium LifePo4 12v Batteries - Time For An Upgrade?
- Thread starter Dellmassive
- Start date
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- lithium battery
I just filtered “Sold’ prices; £281 with a starting price of £150, looks like they have increased the starting price to £280.
Any idea what they were used for previously, renewable energy, UPS? Manufacturing date?
Looks like you have the Valence BMS, not sure that I would need that with a single battery, just a voltage monitor should be enough and a pair of chainsaw trousers for the first trip in the canoe with an ’unknown’ 138Ah battery between my legs.
If I do get one I think I’ll get the local battery specialist to give it a check over.
Cheers for the pointer, it’s significantly cheaper than the Renogy.
I take it if you have three you are happy with them.
These batteries have an internal BMS, i have the USB cable and software to read the BMS,
so the screen shot above shows the data from the battery, . . .
ie, charge discharge cycles, total wh discharged, any alarm etc etc etc.
I've got another one in my battery box . . . . . . . . .
www.t6forum.com
.
so the screen shot above shows the data from the battery, . . .
ie, charge discharge cycles, total wh discharged, any alarm etc etc etc.
I've got another one in my battery box . . . . . . . . .
12v Lithium Leisure Battery Box 138Ah 1766Wh -- How I Done It --
12v Lithium Leisure Battery Box 138Ah 1766Wh -- How I Done It -- It's about time that I got this long-overdue project sorted out. The missing parts are on order and completion is in sight . . . . . . . . ready for the Post Pandemic 2020 Camping Trips (Hopefully) This is where it started. p1...
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Where do you source the software and cable?These batteries have an internal BMS, i have the USB cable and software to read the BMS,
so the screen shot above shows the data from the battery, . . .
ie, charge discharge cycles, total wh discharged, any alarm etc etc etc.
I've got another one in my battery box . . . . . . . . .
12v Lithium Leisure Battery Box 138Ah 1766Wh -- How I Done It --
12v Lithium Leisure Battery Box 138Ah 1766Wh -- How I Done It -- It's about time that I got this long-overdue project sorted out. The missing parts are on order and completion is in sight . . . . . . . . ready for the Post Pandemic 2020 Camping Trips (Hopefully) This is where it started. p1...
.
After weeks on the internet I gave up ....... I Made my own cable.
With comparible software....
I've got the cable and software listed for £19.99
For the green v2 versions.
With comparible software....
I've got the cable and software listed for £19.99
For the green v2 versions.
-- Whos Got What ---
heres a nice little peek at @Deaks twin Valence V1 (130ah + 130ah) Black Lifpo4 + Victron install.
currently work in progress . . . .
.
www.t6forum.com
.
shows us your Lifpo4 installs . . . . .
heres a nice little peek at @Deaks twin Valence V1 (130ah + 130ah) Black Lifpo4 + Victron install.
currently work in progress . . . .
.
Do I need a (240v) feed fuse for victron charger?
So I’m running all the cables for the conversion and all is going well, despite always needing more cable!! The test install of the victron kit has been successful, so now I need to put the finish panel behind and re fix it all back. The space to the right of the MPTT solar controller is for...
.
shows us your Lifpo4 installs . . . . .
Where do you list the cable and software?
I only have Apple products (IOS), is the software compatible, I’m guessing not as I would need a USB port anyway?
Is there another plug in device that can be used an an bluetooth interface?
i had a few on ebay,
software is windows based.
***********************************
best way then (for you) is just to fit a Victron Smart shunt or BMV712 and use any device to monitor via bluetooth . .
ie voltage, current, watts, SOC etc etc etc.
software is windows based.
***********************************
best way then (for you) is just to fit a Victron Smart shunt or BMV712 and use any device to monitor via bluetooth . .
ie voltage, current, watts, SOC etc etc etc.
update and testing . . . .
**********************************
I've just bagged myself a third Valence U27-12XP Series 12V 138ah Lifepo4
and they have more in stock - get yours here -->
lifepo4 battery Valence U27-12XP Series 12V 130 amp | eBay
1off lifepo4 battery Valence U27-12XP Series 12V 130 amp. Condition is Used. sold as is where is you decide if fit for use, no warranty given or implied, improper use can lead to injury or death, and no returns. Cash on Collection in person only, and you can pick out your own, check out...
rover.ebay.com
**********************************
its in to its time to start testing . . .
ID-3 this time . . .
first up is a full top charge to 100% . . . The trusty Victron 12/20/1 had this done in no time.
next up was to fully discharge the battery via a power meter. . . . and read the ah, then full charge to 100% again.
that way we will have discharged, and recharged value that the battery can achive, , ,
we then compaire this to the as-new value . . . . for this battery its 138ah new.
lets get started . .
first up lets hook it up.
were using these meters to monitor.
BM2,
current shunt,
bmv712
12v round meter
victron conect to inverter,
all connected via the bus bars . .
lets start so . . . . . 12A to start with via a heat gun . .
all good, . . .
so time to up the power draw . . .
now adding a dehumidifyer . . . now drawing 45A.
this is what we have on the thermals at 45A draw , . . .
heatgun and inverter . .
.
dehumidifyer and battery in background . .
.
notice the heat build up over the trip switch isolator !!!!
.
hours later we were at 126ah and the battery voltage started to fall of the clif...
.
.
the bm2 results back up the inline meter . . . . 129ah used.
and a final BMS check . . . . (note the issue with internal BMS showing 99% full when its empty - but doesnt effect us here)
so there we go, the discharge test acheived 126 129 ah from a 138ah battery
im very happy with that.
edit:
---
start rest voltage @ 13.5V
45A draw cycling for about 3.5hrs.
discharged capacity from full charge down to 11v cut off @ 126ah.
recharged capacity from 11v cut off to 14.6v float/storage (less than 1amp draw) @ 1256ah
91% capacity from new spec (138ah / 126ah * 100 = 91.3)
---
**********************************
I've just bagged myself a third Valence U27-12XP Series 12V 138ah Lifepo4
and they have more in stock - get yours here -->
lifepo4 battery Valence U27-12XP Series 12V 130 amp | eBay
1off lifepo4 battery Valence U27-12XP Series 12V 130 amp. Condition is Used. sold as is where is you decide if fit for use, no warranty given or implied, improper use can lead to injury or death, and no returns. Cash on Collection in person only, and you can pick out your own, check out...
rover.ebay.com
**********************************
its in to its time to start testing . . .
ID-3 this time . . .
first up is a full top charge to 100% . . . The trusty Victron 12/20/1 had this done in no time.
next up was to fully discharge the battery via a power meter. . . . and read the ah, then full charge to 100% again.
that way we will have discharged, and recharged value that the battery can achive, , ,
we then compaire this to the as-new value . . . . for this battery its 138ah new.
lets get started . .
first up lets hook it up.
were using these meters to monitor.
BM2,
current shunt,
bmv712
12v round meter
victron conect to inverter,
all connected via the bus bars . .
lets start so . . . . . 12A to start with via a heat gun . .
all good, . . .
so time to up the power draw . . .
now adding a dehumidifyer . . . now drawing 45A.
this is what we have on the thermals at 45A draw , . . .
heatgun and inverter . .
.
dehumidifyer and battery in background . .
.
notice the heat build up over the trip switch isolator !!!!
.
hours later we were at 126ah and the battery voltage started to fall of the clif...
.
.
the bm2 results back up the inline meter . . . . 129ah used.
and a final BMS check . . . . (note the issue with internal BMS showing 99% full when its empty - but doesnt effect us here)
so there we go, the discharge test acheived 126 129 ah from a 138ah battery
im very happy with that.
edit:
---
start rest voltage @ 13.5V
45A draw cycling for about 3.5hrs.
discharged capacity from full charge down to 11v cut off @ 126ah.
recharged capacity from 11v cut off to 14.6v float/storage (less than 1amp draw) @ 1256ah
91% capacity from new spec (138ah / 126ah * 100 = 91.3)
---
Last edited:
next up was the recharge test to see if the numbers add up . . .
back indoors . .
power meter showing the flat battery at 11.9v . .
time to re charge . .
30A charge from the victron 12/30/1 . . . .
which gets HOT at 30A
.
20ah into the charge . .
thge BM2 readout . . .
....
i shut it down over night . . . . and carried on the next day . . .
.
the final result . . . .
4x charge sessions . . .
69.6ah
38.9ah
12.5ah
5.4ah
which total 126ah . . . . . so the numbers add up.
126ah discharged (to 11v) and recharged to float.
im very happy with that . . .
so much so in fact I've ordered another one (to make 4 total )
*****************************
so if you want to test your batteries capacity, now you know how.
full charge to float - till the battery draws less than an amp.
discharge through a power meter to read ah used. down to flat or 11v
fully recharge again as above.
the discharge and recharge numbers should add up.
*****************************
How awesome is Lithium . . . basically you can use 100% of the stored energy . . .
you cant do that with a SLA or AGM lead based battery !!!!!!!!!
next to no volt drop or sag . . .
pulling 45A for hours on end !!!!
i love them.
********************************
edit:
---
start rest voltage @ 13.5V
45A draw cycling for about 3.5hrs.
discharged capacity from full charge down to 11v cut off @ 126ah.
recharged capacity from 11v cut off to 14.6v float/storage (less than 1amp draw) @ 1256ah
91% capacity from new spec (138ah / 126ah * 100 = 91.3)
---
back indoors . .
power meter showing the flat battery at 11.9v . .
time to re charge . .
30A charge from the victron 12/30/1 . . . .
which gets HOT at 30A
.
20ah into the charge . .
thge BM2 readout . . .
....
i shut it down over night . . . . and carried on the next day . . .
.
the final result . . . .
4x charge sessions . . .
69.6ah
38.9ah
12.5ah
5.4ah
which total 126ah . . . . . so the numbers add up.
126ah discharged (to 11v) and recharged to float.
im very happy with that . . .
so much so in fact I've ordered another one (to make 4 total )
*****************************
so if you want to test your batteries capacity, now you know how.
full charge to float - till the battery draws less than an amp.
discharge through a power meter to read ah used. down to flat or 11v
fully recharge again as above.
the discharge and recharge numbers should add up.
*****************************
How awesome is Lithium . . . basically you can use 100% of the stored energy . . .
you cant do that with a SLA or AGM lead based battery !!!!!!!!!
next to no volt drop or sag . . .
pulling 45A for hours on end !!!!
i love them.
********************************
edit:
---
start rest voltage @ 13.5V
45A draw cycling for about 3.5hrs.
discharged capacity from full charge down to 11v cut off @ 126ah.
recharged capacity from 11v cut off to 14.6v float/storage (less than 1amp draw) @ 1256ah
91% capacity from new spec (138ah / 126ah * 100 = 91.3)
---
Last edited:
Great info again. I dont have all the kit to do that charge and recharge to test it. :/
On the victron mppt and chargers I use the default Lifepo4 setting for the Valence battery.
.
.
So 14.2 will fully charge the battery not 14.6?
Yes. 14.2v or 14.6v will fully charge the lithium as the charged rest voltage is around 13.5v.
Valence U27-12XP Lithium Ion 12v 138Ah U-Charge Battery Modules
FREE SHIPPING! Lithium energy density is double that of a standard acid battery; which means a battery half the dimensions can offer an equivalent quantity of power. They’re lightweight and compact which translates to better efficiency for transportable outdoor or RV applications compared to...
www.mullerindustriesusa.com
Valence U27-12XP Lithium Ion 12v 138Ah U-Charge Battery Modules
FREE SHIPPING! Lithium energy density is double that of a standard acid battery; which means a battery half the dimensions can offer an equivalent quantity of power. They’re lightweight and compact which translates to better efficiency for transportable outdoor or RV applications compared to...
These are used
Gotch. Those are used second hand ones, in the USA , states.Valence U27-12XP Lithium Ion 12v 138Ah U-Charge Battery Modules
FREE SHIPPING! Lithium energy density is double that of a standard acid battery; which means a battery half the dimensions can offer an equivalent quantity of power. They’re lightweight and compact which translates to better efficiency for transportable outdoor or RV applications compared to...
Thought they were new ...lol.
These batteries normally sell for £400 up . second hand in the uk
Last edited:
I dont think it would fit under my seat stood up anyway 
