OnTheRoadAgain
Solar Enthusiast
- Joined
- Feb 22, 2021
- Messages
- 643
Hello,
I just recently ordered a Rebel LiFePO4 100Ah battery and it's scheduled to arrive Wednesday.
Seems there are a number of new ready made LiFePO4's coming on the market.
Since these batteries are sealed and you cannot open them to get to the BMS and cells, I am exploring options for verifying the battery is of good quality and will last.
The choices are overwhelming. So many brands with so many reviews. I ultimately decided to just go for ONE of them. I was going to go SOK but they were unavailable last week. I was going to go AmpereTime, but the price went up. I looked at Chins...to many bad reviews.
Sure it has a 5 year warranty, but that warranty is null and void if the company folds next year.
So the question ultimately becomes....HOW can you check your new battery?
A capacity test is about the only test I know.
Resistance? Is it even possible to test a LiFePO4 battery resistance if you cannot reach the BMS?
I have no reason to doubt Rebel. But as a former famous President once said....."Trust, but verify"
That said, I know full well that if I open it, the warranty is void, they even say so. So Will's way will not work for most of us.
Imagine I open it anyway and find some really crappy cells with wildly varying resistances and discharge rates?
At that point I have no warranty anyway.
Do you avoid totally sealed ready made LiFePO4 batteries for that reason?
As the prices for 100Ah LiFePO4 ready made batteries come down, I would venture a guess that we will see more and more of them sold.
So what if any ways are there to test the quality of these ready built, sealed LiFePO4 batteries?
I just recently ordered a Rebel LiFePO4 100Ah battery and it's scheduled to arrive Wednesday.
Seems there are a number of new ready made LiFePO4's coming on the market.
Since these batteries are sealed and you cannot open them to get to the BMS and cells, I am exploring options for verifying the battery is of good quality and will last.
The choices are overwhelming. So many brands with so many reviews. I ultimately decided to just go for ONE of them. I was going to go SOK but they were unavailable last week. I was going to go AmpereTime, but the price went up. I looked at Chins...to many bad reviews.
Sure it has a 5 year warranty, but that warranty is null and void if the company folds next year.
So the question ultimately becomes....HOW can you check your new battery?
A capacity test is about the only test I know.
Resistance? Is it even possible to test a LiFePO4 battery resistance if you cannot reach the BMS?
I have no reason to doubt Rebel. But as a former famous President once said....."Trust, but verify"
That said, I know full well that if I open it, the warranty is void, they even say so. So Will's way will not work for most of us.
Imagine I open it anyway and find some really crappy cells with wildly varying resistances and discharge rates?
At that point I have no warranty anyway.
Do you avoid totally sealed ready made LiFePO4 batteries for that reason?
As the prices for 100Ah LiFePO4 ready made batteries come down, I would venture a guess that we will see more and more of them sold.
So what if any ways are there to test the quality of these ready built, sealed LiFePO4 batteries?
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