Battery amp per volt

[The_Traveller]

Ok so I'm clueless when it comes to battery terminology, so I'm wondering how does a 12v 100Ah battery work...

If I want to know how many amps per volt will I get from a 12v100ah battery , do I just say 100ah/12v=8.33A? And then to calculate how many watts that is do I say 8.33A x 48v (if inverter voltage is 48v) = 400w. ..

Hope I'm even a little accurate otherwise :facepalm :

 

[Magnum]

Sigh. Google AH rating before posting here...These Banshees will shred you.

Ah is Amp hour. meaning you will get 100 Amps for one hour. or 50 amps for 2 hours. Now there is also a C rating in which it is described how fast you can discharge the battery if I remember correctly.

Also batteries don't like to be discharged completely. Deep cycle is 50% discharged. lithium much less in the region of 25% .

Now that I have pointed you in the right direction... GO GOOGLE!

 

[Azbubu]

Rated 100AH @ how many hours or how much current?

 

[Magnum]

well 100A is current. Don't know what you are asking.

 

[The_Traveller]

Thanks for the reply magnum...

I'm not really wanting to know how many amps per hour, but amps per voltage.

For example, on my 4 x 12v100ah setup , power cut at 8pm and after two hours the inverter was showing 50v remaining.

So I still had a further 6v of battery to keep my house powered.

So that 6v = ?A

Take it easy on me guys ...

 

[Arthur]

Rated 100AH

100 Amp-Henries? What's inductance got to do with it?

 

[Magnum]

100 Amp-Henries? What's inductance got to do with it?

Beats me. No sleep. deadlines and a MAD boss on my back which is going to get a beating soon because he is barking up the wrong tree...

Thanks for the reply magnum...

I'm not really wanting to know how many amps per hour, but amps per voltage.

For example, on my 4 x 12v100ah setup , power cut at 8pm and after two hours the inverter was showing 50v remaining.

So I still had a further 6v of battery to keep my house powered.

So that 6v = ?A

Take it easy on me guys ...

ok.12 x 2 = 24v @ 100 Ah.
or 12 x 2 = 12v @ 200 Ah.
first is serie. Second is parallel.

How many amps did you pull at what lenght of time. That would be watt hour. Saying you have 6v left is incorrect. I think Inverters cut out @ 10.8 v on low voltage for 12 v setup and 21.6 v on serie setup.

You need some in dept education to answer the question you are asking. Most kids can't do this with a 1 year Physics crash course.

 

[Azbubu]

well 100A is current. Don't know what you are asking.

Battery capacities are specified for certain rates. It's probably the default 20 hours if not stated otherwise. So his 100Ah can source 5A for 20 hours.

 

[thehuman]

Thanks for the reply magnum...

I'm not really wanting to know how many amps per hour, but amps per voltage.

For example, on my 4 x 12v100ah setup , power cut at 8pm and after two hours the inverter was showing 50v remaining.

So I still had a further 6v of battery to keep my house powered.

So that 6v = ?A

Take it easy on me guys ...

Does this inverter shows load as in wats ? Or sometimes an % of total load
Its very hard to meusure state of charge from a battery that is being discharged ( needs to stabilise for a hour)

 

[Magnum]

Ah ok. Well the OP himself does not know what he is asking. No offense but he is not even a layman. With that division he did there I recon he is poking a very angry Crock with a very short stick. he needs to familiarize himself with all the terms, ratings, and calculations.
Like I said I did the whole higher grade high school Physics from Gr 8 to Gr 12 in 3 months last year as a refresher and most guys couldn't crack it . Now I remembered why I hated Newton so much...If I can only get my hands on him.

 

[alkit]

Much easier - amp hours x volts = 1200wh
Then times by 80% running battery down fast) and 50% (preferred depth of discharge).
That gives you 480wh
So you can run a 100w TV for 4.8 hours before needing to recharge the battery

 

[Magnum]

Much easier - amp hours x volts = 1200wh
Then times by 80% running battery down fast) and 50% (preferred depth of discharge).
That gives you 480wh
So you can run a 100w TV for 4.8 hours before needing to recharge the battery

forgot to include inverter consumption.

 

[The_Traveller]

Ah ok. Well the OP himself does not know what he is asking. No offense but he is not even a layman. With that division he did there I recon he is poking a very angry Crock with a very short stick. he needs to familiarize himself with all the terms, ratings, and calculations.
Like I said I did the whole higher grade high school Physics from Gr 8 to Gr 12 in 3 months last year as a refresher and most guys couldn't crack it . Now I remembered why I hated Newton so much...If I can only get my hands on him.

The only Banshee shredding me is you. And I do take offence because this is a forum to discuss matters. I clearly admitted that I am ignorant in this matter so will obviously make a layman look good. So back off !

Thanks to the others who chimed in with decent replies even though you're also/probably wanted to shred me Banshee style.

Peace, out !