Comparing wet to dry batteries?

[Colvic Watson]

I’m getting my watts mixed up and fack to brunt.
I want to compare the useable capacity of wet lead batteries to LiPo. Taking each of the 100ah lead acid batteries which have about 60Ah of useable capacity. At 12.5v that’s 750w.
Now I’m thinking of adding a power station which has lots of different outputs but that’s rated at 230v and has 1.5kwh of useable capacity.
I know I’m comparing an apple to an orange but what’s the comparable energy amount?

Thank you!

 

[PaulRainbow]

I’m getting my watts mixed up and fack to brunt.
I want to compare the useable capacity of wet lead batteries to LiPo. Taking each of the 100ah lead acid batteries which have about 60Ah of useable capacity. At 12.5v that’s 750w.

Max sensible discharge from LA batteries is 50%, so your 100ah batteries have a usable 50ah. Watts do not come into "usable capacity".

Now I’m thinking of adding a power station which has lots of different outputs but that’s rated at 230v and has 1.5kwh of useable capacity.
I know I’m comparing an apple to an orange but what’s the comparable energy amount?

Thank you!

How are you converting 230v to 12v ? If that's part of the power station there will be some losses. Without more detail it's not possible to make a comparison.

Link to the power station ?

 

[VicS]

I’m getting my watts mixed up and fack to brunt.
I want to compare the useable capacity of wet lead batteries to LiPo. Taking each of the 100ah lead acid batteries which have about 60Ah of useable capacity. At 12.5v that’s 750w.
Now I’m thinking of adding a power station which has lots of different outputs but that’s rated at 230v and has 1.5kwh of useable capacity.
I know I’m comparing an apple to an orange but what’s the comparable energy amount?

Thank you!

Taking your figure of 60Ah useable capacity, at 12.5 volts that's 750wh or 0.75 kwh. That is half of the usable capacity of the "power station".

 

[Colvic Watson]

Yes there is some loss, converting by digital battery charging so about 12% loss. The huge difference is weight and size.

 

[Colvic Watson]

Taking your figure of 60Ah useable capacity, at 12.5 volts that's 750wh or 0.75 kwh. That is half of the usable capacity of the "power station".

Thank you. So watts are the key? Just compare watt to watt and ignore the volts? In my muddled mind I was assuming that 1500w at 230v was more than twice the power of 750w at 12v.
Thank you

 

[PaulRainbow]

Thank you. So watts are the key? Just compare watt to watt and ignore the volts? In my muddled mind I was assuming that 1500w at 230v was more than twice the power of 750w at 12v.
Thank you

As i said in my earlier post, watts are not a measure of capacity. Ah or Wh are.

 

[simonfraser]

Just compare watts from the different supplies that will give you a guide
It’s obviously over time, so you should think about Wh = watts per hour
How many watts you can get out of a battery varies with capacity, from the main likely indefinite

 

[S04]

It’s obviously over time, so you should think about Wh = watts per hour

Well not really, if it was Watts per hour it would be written W/h. A Watt is a Joule per second therefore Watts per hour would be Joules per second per hour. Wh is Watts x hours not Watts / hours.

 

[PaulRainbow]

Just compare watts from the different supplies that will give you a guide

Noooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo

A Watt is a unit of power.

It’s obviously over time, so you should think about Wh = watts per hour

A Wh is a unit of power. 1 watt for 1 hour is 1 Wh.

How many watts you can get out of a battery varies with capacity, from the main likely indefinite

No. You can get the same watts from two different capacity batteries, just not for so long.

 

[simonfraser]

Yeh we’ve had this discussion b4, for the lay person, inc me, a watt from the power point at home or my boat battery is the same amount of energy

So if I want to compare the mains supply or batteries I use watts, per / over whatever seconds hours joules etc

 

[simonfraser]

Poster is asking about capacity, that varies with what supplies the power, I’ll leave you all to this

 

[Alan S]

Dear oh dear.

 

[Alex_Blackwood]

I’m getting my watts mixed up and fack to brunt.
I want to compare the useable capacity of wet lead batteries to LiPo. Taking each of the 100ah lead acid batteries which have about 60Ah of useable capacity. At 12.5v that’s 750w.
Now I’m thinking of adding a power station which has lots of different outputs but that’s rated at 230v and has 1.5kwh of useable capacity.
I know I’m comparing an apple to an orange but what’s the comparable energy amount?

Thank you!

Don't really have any idea what you are on about. However I suspect that you are trying to compare LA batteries to a "PowerStation" containing LiPo batteries.?
Watts= Volts X Amps. Etc.
With your 12.5 volt 100ah LA battery having a useful capacity of 50ah, If you run a load of 625 Watt (12.5 x 50) it will last for an hour.
If your "Power Station" has a capacity of 1.5Kwh @230 volts, it will provide 6.25 amps for hour into a 1.5Kw load. If the internal LiPo battery is 12.5 v. it will provide 120 amps. (120 ah) for that hour. (NB. Half an hour for 3Kw.)
Does that help?
PS You would need at least 240ah LA battery to run the "Power Station" at 1.5Kw for the hour.

 

[PaulRainbow]

Without providing some information as to what this "Power station" is, this thread is largely pointless. It's even more pointless without knowing the OPs intended use and how he'll charge it.

It sounds like it might be a IfheP04 battery in a box, but if it outputs 240v it must have in inbuilt inverter, which will have losses, typically 10%. If it's only intended for 12v systems it's a waste of an inverter, the OP only needs the LifeP04 battery.

More info needed........................

 

[Sandro]

I may be dumb but I could not understand what the OP is looking for.
There is a thick fog.

If this can help:
ENERGY: Joule, W*h, kW*h, kgf*m, Lbs*foot, torque*angle, money, capital, £.
POWER: W, kW, Joule/sec, kW*h/h, kWh/day, HP, salary, wages, rent, £/month, $/week.

Please do not mix up.

 

[AngusMcDoon]

If this can help:
ENERGY: Joule, W*h, kW*h, kgf*m, Lbs*foot, torque*angle, money, capital, £.
POWER: W, kW, Joule/sec, kW*h/h, kWh/day, HP, salary, wages, rent, £/month, $/week.

You forgot one - in the FFF system power is firkins times squared furlongs per cubed fortnight. I tried to work out the scaling factor to kW but it made my head hurt and after a couple of dozen microFortnights I gave up.

 

[Alex_Blackwood]

I suspect the OP is talking about these Who knows
power station - Google Suche

 

[PaulRainbow]

I suspect the OP is talking about these Who knows
power station - Google Suche

Most likely, but which one ?

As is often the case, scant information, even when specifically asked for something.

 

[Alex_Blackwood]

Most likely, but which one ?

As is often the case, scant information, even when specifically asked for something.

Paul, Confusion between Electrician and Magician Easily done Trouble is we are not psychic

 

[Colvic Watson]

Here’s what I’m trying to compare: a power station that has a useable capacity of 1.5kwh at 230v
Vs lead acid batteries through an inverter.
To get the same 1.5kwh from lead acid am I right in saying that I’d need three 100ah 12v batteries? i.e. 3x50x12?

Of course the power station has significant advantages, it’s lighter; has lots of charge/discharge sockets; and crucially can charge its full capacity in 70 minutes. Doing that with lead acid would boil the acid off.