Looking with my magnifying glass I've noticed the following...

 

There appear to be little differences between figures, for example:

Dyness LiFePo4 B3.

Max. continuous charge/discharge current: 50A

Calendar life 6000cycles.

Recommended C rating 0.5C

(small print [for calendar life] - 0.2C Charge/discharge @25*C, 80%Dod)

 

LBSA LiFePo4 24V(25.6V) 210Ah Smart Battery

Max Charge/Discharge Current (A): 100A

Nominal Power (Wh) >5.2kWh @ 0.4c (tested)

Cycle life ≥80% capacity state after 4800 cycles @ 100A, 25*C, 100% Dod

 

So I don't know, my brain hurts, but there seems to be claims of what it can do and is based on a test that does reflect what it will do. I feel a bit like I'm being sold a hot dog without the hot. Am I missing some arcane dog detail? Please help..

 

Let me be the first to go:)

 

The Dyness specs seem more limited ito performance. The battery is only rated for 6000 cycles, at a very slow discharge rate of .2C, or 10A in this case, and only down to 20% SOC. What the state of the battery is after that is unknown(?)

Also, the actual discharge/charge current is quotes as 37.5A in a few places, not 50A

 

The LBSA says it'll still have 80% of it's new capacity when discharged at 100A (.5C) to 0 SOC, so a much better result.

 

This also means the useable kWh of the Dyness is going to be less if you're trying to get max cycles from it.

That's all on paper - real world results might vary.

 

Btw, why are you comparing 24V and 48V batteries?

 

Ian

 

 

Edited March 31, 20224 yr by Ian

Hi @Ian

Thanks for responding.

So my comparison was not intended to be about 24 vs 48V per se, those were just the first two datasheets I pulled up. It was more of a ramble about the nature of spec sheets and their clever figures...to be honest, I thought of scrapping the post as it was one of those things someone blurts out as they discover a new fact that alters the fantastical claim they just read, or were just told by a smiling man with a eco-beard.

I've only been studying up on solar/electricity/etc for about two weeks now so it's a bit of roller coaster ride of "hooray I've found something" to "damn them precious, they'z thiefses".

RRG welcome to the new world of electrons and snaky claims. Best to try and compare on the same values like discharge rate and DOD.

A lot is claims and in years to come we will know.....

Important factors in battery comparison are chemistry (e.g. lifepo4, NMC etc), depth of discharge, recommended and max charge and discharge rate (C) and cycle life (including remaining capacity at end of life).