Silly Question- 12V or 24V system

[Guliver]

As I am new and am leaving the boxing gloves off I just want the correct information. Thank You!

No boxing gloves here, click the link at the bottom of my post that you quoted.

[theservicegroup777]

Sorry Paul, you're statement is incorrect.

Connecting in Series
When connecting your batteries in Series you are doubling the voltage while maintaining the same capacity rating (amp hours). This might be used in a scooter, Power Wheels kids vehicle, or other applications. Just use a jumper wire between the negative of the first battery and the positive of the second battery. Run your negative wire off of the open connector from the first battery and your positive off of the open connector on your second battery.

Connecting in Parallel
When connecting in Parallel you are doubling the capacity (amp hours) of the battery while maintaining the voltage of one of the individual batteries. This would be used in applications such as laptop batteries, some scooters, some ups backups, etc. Use a jumper wire between the positives of both batteries and another jumper wire between the negatives of both batteries. Connect your positive and negative wires to the same battery to run to your application.


Connecting Batteries in Series or Parallel

As I am new and am leaving the boxing gloves off I just want the correct information. Thank You! Now back to the task at hand. What are some good Inverter options? Names? 24V of course .

Oh and the poster that said 6v golf car batteries a few post up. I would love to but costco doesnt show that they carry it or what kind of price it should be.

[theservicegroup777]

No, if you have 4 12volts 100amps hours, you have 400 AHs, if you connected 2x2 you have 2 times 200ahs =400 ahs, if you connect 4 in series you have 4 times 100amps = 400 ahs. if you connect them 4 time 100amps in parallel you still = 400 ahs.

The total amp hours in a battery bank don't change just like total watt hours.

Your contradicting yourself...

[Guliver]

The total amp hours in a battery bank don't change just like total watt hours.

Sorry Paul, you're statement is incorrect.

Connecting in Series
When connecting your batteries in Series you are doubling the voltage while maintaining the same capacity rating (amp hours). This might be used in a scooter, Power Wheels kids vehicle, or other applications. Just use a jumper wire between the negative of the first battery and the positive of the second battery. Run your negative wire off of the open connector from the first battery and your positive off of the open connector on your second battery.

Connecting in Parallel
When connecting in Parallel you are doubling the capacity (amp hours) of the battery while maintaining the voltage of one of the individual batteries. This would be used in applications such as laptop batteries, some scooters, some ups backups, etc. Use a jumper wire between the positives of both batteries and another jumper wire between the negatives of both batteries. Connect your positive and negative wires to the same battery to run to your application.


Connecting Batteries in Series or Parallel

[paulcheung]

No, if you have 4 12volts 100amps hours, you have 400 AHs, if you connected 2x2 you have 2 times 200ahs =400 ahs, if you connect 4 in series you have 4 times 100amps = 400 ahs. if you connect them 4 time 100amps in parallel you still = 400 ahs.

The total amp hours in a battery bank don't change just like total watt hours.

[theservicegroup777]

The Ampere hours is like watt hours. it won't change no matter how you arrange the batteries.

Not so sure about this?

So if I have 4 100ah 12v batteries in Parallel , your telling me at the end of my string I still have just a 12v 100ah battery?

[paulcheung]

Sorry Parallel, but you get my drift.



Yes the Ah change the Watt hours do not.

The Ampere hours is like watt hours. it won't change no matter how you arrange the batteries.

[Guliver]

Didn't I bring that up a few posts ago?

And 8 x 100 Ah in parallel would be an 800 Ah 12 volt system = 9600 watts not 4800 watts

Sorry about that not sure Watt I was thinking.

[SunEagle]

the part in bold is incorrect it would be 8 batteries in PARALLEL

Didn't I bring that up a few posts ago?

And 8 x 100 Ah in parallel would be an 800 Ah 12 volt system = 9600 watts not 4800 watts

[Naptown]

the part in bold is incorrect it would be 8 batteries in PARALLEL

[theservicegroup777]

There is an advantage for cabling and lower losses as you say, there really isn't a difference in battery size or price between A 100 AH 48v battery = a 200AH 24v battery = a 400AH 12v battery.

Your 12V battery will consist 8 X 100Ah batteries in series, 400Ah X 12V = 4800 Watt hours.

Your 24V battery will consist 8 X 100Ah batteries in 4 strings of 2 X series with the strings in parallel, 200Ah X 24V = 4800 Watt hours

Your 48V battery will consist 8 X 100Ah batteries in 2 strings of 4 X series with the strings in parallel, 100Ah X 48V = 4800 Watt hours.

Same watt hours and cost in each case.

IM SOOOOOO CONFUSED. Wouldnt this be 12V at 800ah = 9600 Watt Hours Unless your explanations are showing a 50% state of discharge? If so I missed where you mentioned this. Obviously using 100% of a bank is foolish.. Maybe someone can explain where im calculating wrong

[theservicegroup777]

Sorry Parallel, but you get my drift.



Yes the Ah change the Watt hours do not.

Is it not Watts = Amp X Volts Totaling 9600 WH?

[Guliver]

Better check your math. 8 x 100 Ah batteries in series will get you a 96volt 100Ah system.

Now 4 x 100Ah 12 volt batteries in parallel will get you a 12 volt 400 Ah system or 4800 watt hours.

Sorry Parallel, but you get my drift.

Wouldnt this 48V bank have a 200AH ??

Yes the Ah change the Watt hours do not.

[theservicegroup777]

There is an advantage for cabling and lower losses as you say, there really isn't a difference in battery size or price between A 100 AH 48v battery = a 200AH 24v battery = a 400AH 12v battery.

Your 12V battery will consist 8 X 100Ah batteries in series, 400Ah X 12V = 4800 Watt hours.

Your 24V battery will consist 8 X 100Ah batteries in 4 strings of 2 X series with the strings in parallel, 200Ah X 24V = 4800 Watt hours

Your 48V battery will consist 8 X 100Ah batteries in 2 strings of 4 X series with the strings in parallel, 100Ah X 48V = 4800 Watt hours.

Same watt hours and cost in each case.

Wouldnt this 48V bank have a 200AH ??

[SunEagle]

There is an advantage for cabling and lower losses as you say, there really isn't a difference in battery size or price between A 100 AH 48v battery = a 200AH 24v battery = a 400AH 12v battery.

Your 12V battery will consist 8 X 100Ah batteries in series, 400Ah X 12V = 4800 Watt hours.

Your 24V battery will consist 8 X 100Ah batteries in 4 strings of 2 X series with the strings in parallel, 200Ah X 24V = 4800 Watt hours

Your 48V battery will consist 8 X 100Ah batteries in 2 strings of 4 X series with the strings in parallel, 100Ah X 48V = 4800 Watt hours.

Same watt hours and cost in each case.

Better check your math. 8 x 100 Ah batteries in series will get you a 96volt 100Ah system.

Now 4 x 100Ah 12 volt batteries in parallel will get you a 12 volt 400 Ah system or 4800 watt hours.