Any battery experts out there that can explain ...........

[Taff015]

What's the difference between a leisure battery in ah and a solar battery pack in wh?

Currently I have 2 x 120ah batteries in my van and I'm looking at supplementing this with a solar battery thing (jackery for example) but their offerings are explained in wh ie a 1000wh battery pack .

I get that ah is amps and wh is watts but do I just do an ohms law conversion to see equivalence?

or is there no equivalence?

Basically my van doesn't have any 12v sockets and all i have is a 300w inverter linked to the 12v system that runs the tv and my wifi thing. all cool. But what i want to do is to be able to run some fans at night. I have a hubi 10k which can power 1 x fan via its 12v socket but I also have a 240v dyson fan that i was toying with using and these power banks caught my eye as they have 3 pin sockets built in

I could just replace my current inverter and go lithium but Im awkward and would also use a power bank when camping and not with the van


I'm just curious as to what size power bank would be the equivalent to my 2 x 120ah batteries I guess!

 

[Lenny HB]

1000 wh will be 83 ah at 12v
120ah is 1440wh

To work it out divide the wh by the voltage to get ah.
Or multiply ah by voltage to get wh.

 

[Ingwe]

1000 wh will be 83 ah at 12v
120ah is 1440wh

To work it out divide the wh by the voltage to get ah.
Or multiply ah by voltage to get wh.

Ohm truly grateful for your help.

 

[Taff015]

Just glad its as straightforward as that!!

 

[autorouter]

What's the difference between a leisure battery in ah and a solar battery pack in wh?

Watt-hours (Wh) is the energy capacity. Amp-hours (Ah) is the charge capacity.

To find the Wh from the Ah you need to know the voltage. Voltage tells you how much energy each unit of charge has.

For example, a 100Ah 12V leisure battery has an energy capacity of 100 x 12 = 1200Wh.

Because most automotive batteries are 12V, the Ah capacity is enough for people to decide on the size of battery. However many of the newer batteries, like 36V bike batteries and 3.6V phone charging power packs, have very different voltages so it's best to compare the energy capacity (Wh)

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[Insider]

To simplify(or perhaps complicate) it's a lovely useful equation - always remember to "wav"

W=A.V Watts=Amps x Voltage

move A or V to the other side of the = and they go below the line allowing you to do the maths. Add in hours to figure out capacity by adding a "hr" to both sides
W(hr) = A(hr).V

Your voltage is always likely to be 12V but it works for any voltage - you can see how long in theory your batteries will run an invertor etc. Just remember you can use 90% of your lithium capacity without damaging your batteries but only about 50% of lead acid battery capacity before having to recharge if you want to avoid damaging them.