Arctic weather killed my LiFePO4 batteries? Were they broken from the start? I run out of voltage suddenly in the middle of forest, and start troubleshooting what is wrong with my camper van Lithium-ion battery setup.

These battery self-discharge and capacity degradation DIY tests result to a Renogy warranty ticket with monetary compensation in my case. Now, I'm building a new DIY battery system with increased capacity, monitoring, self heating features and improved winter van life quality, safety and reliability ????

Summary:
I have 2 identical LiFePO4 Renogy batteries, seems like:
- Battery 1 has broken BMS (battery monitoring system), undervoltage protection cut-off is faulty.
- Battery 2 cells have premature degradation, capacity is 65 Ah in 170 Ah battery.

This video contains some tech talk as I explain how DIY electrical test setup is made with wiring connections and loads, why Lithium-ion battery recharging cycle and absorption is important and what voltage measurements are important and why ????️

Chapters for easy information:
0:00 Renogy Lithium battery warranty compensation tests
0:57 What happened, LiFePO4 low voltage warning
3:58 Renogy test for batteries
4:32 Battery self-discharge measurement
5:23 Components for electrical discharge test
6:45 DIY test setup for loading batteries
7:52 Battery Capacity Degradation test
8:33 Ensure full charge (13.4 V) voltage
9:03 Wake up the battery if hibernating mode
9:22 Failure, try recharge again
9:49 Recharge Lithium-ion battery & Absorption
10:45 Connect Positive & Negative battery terminal
12:33 Start capacity degradation discharge test
13:10 Different discharge slope between identical batteries
14:20 Battery 2 BMS undervoltage cell shutdown
15:39 Premature Lithium-ion cell degradation
16:42 Differences in LiFePO4 battery cell quality grade
17:38 Battery 1 Broken BMS battery monitor system
18:41 12 V LiFePO4 battery at 7.88 V voltage
20:17 Why did not BMS react and cut-off?
21:11 Test results documentation, Measured voltages
21:22 Camper van battery voltage protection
21:41 What is wrong with my Lithium batteries
22:34 Warranty case of Renogy and compensation

????⭐ Happy holidays to everybody! ????⛄

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???? Here is the full playlist of my campervan travels:
https://www.youtube.com/playlist?list=PLWvlmWfGgtui_1aYOwFgp5pI-kZkSdBZe

???? Here is the full playlist of my campervan DIY repair videos:
https://www.youtube.com/playlist?list=PLWvlmWfGgtuiNgo5jv_qHDmz9DKtogMzi

???? My partner and I have built this camper van conversion on our own ???? The complete building process is documented in my blog:
https://badasanaexperiences.wordpress.com/

All constructive advice and questions about my content are welcome ????

Disclaimer: The content provided in these videos is not intended and should not be taken as a guide, best practices, advice or tutorials of any kind. The creator is not responsible for any harm or damage if you follow the procedures or use the content as an example. Please always consult a qualified technician before you do any work on a vehicle or component. ???? Stay safe!

Recorded with OnePlus 10 Pro and GoPro Hero 13 with Media Mod,
Edited with free software (DaVinci Resolve)
https://www.blackmagicdesign.com/fi/products/davinciresolve
Music is from YouTube Audio library.

Living in a camper van (motorhome RV) in Scandinavia
Vanlife Suomi
Mercedes Benz Sprinter L2H2
Class B camper van
Medium wheel base MWB Sprinter panel van
OM-651 2.1 Liter, 4 cylinder engine, 2014
Sprinter W906 3,5t cargo van
Engine 316 CDI
OM651.957
Gear box MB 722.9 7G Tronic (NAG2), Mercedes 722.9 automatic transmission

Broken LiFePO4 battery problems and failure
Faulty Renogy Core LiFePO4 12V Lithium Battery
Bad lithium iron phosphate battery
Premature Lithium-ion cell capacity degradation
BMS battery monitor system failure
Do lithium batteries work in cold winter conditions?
Renogy 5 year guarantee and warranty ticket

Thumbnail Renogy 200 Ah battery image source:
https://eu.renogy.com/products/core-mini-12-8v-300ah-lithium-iron-phosphate-battery-w-low-temperature-protection?variant=46435566977281

Link for Renogy customer service and warranty ticket:
https://eu.renogy.com/pages/contact-us

#lithium #fail #error #troubleshooting #lifepo4 #lithiumbattery