robby
Photon Vampire
- Joined
- May 1, 2021
- Messages
- 4,044
I currently have 16KWh of Fortress eFlex batteries and am thinking that I need about another 10Kwh of batteries to get completely off the Grid. I would love to buy two more eFlex packs, but at this time as I just cannot see that happening. So I was contemplating buying LifPO4 prismatic cells and making my own packs, but saving half the money only makes sense if you get more than half the amount of cycles without issues. If it's half the amount or worst yet less, then the extra work in construction makes it a bad investment.
I came across this interesting video and came to the conclusion that with this much testing going on it would seem highly unlikely that a Grade A cell is slipping out of a factory at Grade B prices unless it's intentional.
As you can see, swelling of the batteries is just one of the many reasons why a cell is rejected and sold as grade B.
A lot of the other issues are hard if not impossible to detect. Also the barcode on the top is not a guarantee of anything.
I had a talk with Fortress Batteries and they confirmed that the high prices you pay for Grade A cell packs from them and others is because they are tested to these high standards to assure that companies like them do not get a bombardment of warranty issues during the 10 year warranty period and also because these batteries are not just used in PV systems but are also used in critical systems.
I am interested in hearing other peoples thoughts on the subject.
I came across this interesting video and came to the conclusion that with this much testing going on it would seem highly unlikely that a Grade A cell is slipping out of a factory at Grade B prices unless it's intentional.
As you can see, swelling of the batteries is just one of the many reasons why a cell is rejected and sold as grade B.
A lot of the other issues are hard if not impossible to detect. Also the barcode on the top is not a guarantee of anything.
I had a talk with Fortress Batteries and they confirmed that the high prices you pay for Grade A cell packs from them and others is because they are tested to these high standards to assure that companies like them do not get a bombardment of warranty issues during the 10 year warranty period and also because these batteries are not just used in PV systems but are also used in critical systems.
I am interested in hearing other peoples thoughts on the subject.
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