diy solar

diy solar

What am i missing?

Solarfun4jim

Solar seduced :-)
Joined
Sep 22, 2019
Messages
743
Location
Sunny Scotland
Was looking at a 48V 300AH battery, which states that it is only 3840WH. By my calculations, i make it 14400WH....where am i going wrong?
Also, it states that it is Lithium Ion, but then states further down in the spec that the chemistry is LiFePO4. They seem to use the wording interchangeable. Is there an easy way to be sure of what you are getting from voltage specs etc?

Confused!!!

 
If it's lithium of any type something is amiss there. Lithium lifetime cycle count is usually 80% of initial capacity with each discharge being down to 20% charge or so. That Wh figure is at only 1/3 discharge yet later on they cite 300Ah is 100% DOD. There is no mention at all of cycle count. I wouldn't be spending $16000 with any company that can't even get the information on their own web site internally consistent, let alone one that won't openly tell you the cycle count the battery is rated at.

I wouldn't be surprised if its a Chinese drop shipper with a flashy web site to draw in suckers. IMO, avoid.
 
Thanks gnubie....had no intentions of spending that sort of money, but wondered how i was miss calculating.
It is like 12.8v(4@3.2v) x 300ah = 3840WH instead of the expected 48v x300ah = 14.4KW

You need to be quite the detective to work out what you are getting. At least at 4@3.2v cells nominal(12.8v) or multiples thereof, is likely to be LiFePO4 where as Lithium Ion is usually around 4@3.6v nominal = 14.4V ....as far as im aware :cool:
 

diy solar

diy solar
Back
Top