4@12v = 24v

Salvo wrote:
Time to consider the gen again?

LOL.. yeah, that I understand. The series batteries act just like my solar panels.. I should have realized that.

Time to consider the gen again?

Boy, that is confusing. Thanks. It is 75 amps. The current is the same in every part of a series circuit.

Salvo wrote:
...The 4 6V batteries are all in series. This is one string. The exact same current (150A) goes through each battery...

Sal

If the power delivered was 3600 watts, but for an 1800 watt example with 4-6 volt batteries in series, each battery would provide 75 amps.

Your example is not correct.

"1800w/24v=75a.

4 6v batteries in series will share the load so...

75/4 = 18.75a.

No?"


The 4 6V batteries are all in series. This is one string. The exact same current (75A) goes through each battery.

When you operate the microwave, each 6V battery outputs 75A. If you were using 12V batteries then each 12V battery outputs 37.5A.

Sal

2oldman wrote:
My specific example is incorrect? Please don't just say 'yes'.

Salvo wrote:
In either system, each battery supplies the exact same power (1800W/4).

In either system, each array of batteries must provide the same wattage. But it seems to me the 24v system cuts the amps in half.

pianotuna wrote:
4 6 volt in series (= 24 volts), each and every cell has to put out 150 amps.

So we're pushing 150a @ 24v?

The load determines how much energy is needed or provided by the battery bank.

If losses are ignored, each battery bank of the same net voltage will provide the same net energy.

Energy in joules is equal to watts times seconds, where the watts for an energy source is calculated by voltage times amperage.

So as Salvo has stated, 1800 Watts divided by 4 batteries means each battery will provide 450 watts - losses not included.

My specific example is incorrect? Please don't just say 'yes'.

Salvo wrote:
In either system, each battery supplies the exact same power (1800W/4).

In either system, each array of batteries must provide the same wattage. But it seems to me the 24v system cuts the amps in half.

pianotuna wrote:
4 6 volt in series (= 24 volts), each and every cell has to put out 150 amps.

So we're pushing 150a @ 24v?

I used four 12V batteries. We can also calculate with 6V batteries.

1800W/12V = 150A
1800W/24V = 75A

Each battery in the 12V system supplies 150A/2 strings = 75A.
Each battery in the 24V system supplies 75A/1 string = 75A

If you use 12V batteries, each battery supplies 37.5A.
If you use 6V batteries, each battery supplies 75A.

In either system, each battery supplies the exact same power (1800W/4).

Sal

2oldman wrote:

Salvo wrote:
Yeah, that's wishful thinking. In the case of 4 batteries and a 150A 12V load or 75A 24V load, each battery will put out 37.5A, no matter which configuration.

Boy you lost me on that one.

1800w/24v=75a.

4 6v batteries in series will share the load so...

75/4 = 18.75a.

No?

Hi 2oldman,

4 6 volt in series (= 24 volts), each and every cell has to put out 150 amps.

4 24 volt in parallel, each cell would do 37.5 amps.

2oldman wrote:

Salvo wrote:
Yeah, that's wishful thinking. In the case of 4 batteries and a 150A 12V load or 75A 24V load, each battery will put out 37.5A, no matter which configuration.

Boy you lost me on that one.

1800w/24v=75a.

4 6v batteries in series will share the load so...

75/4 = 18.75a.

No?

I think it has to do with how the load is shared when in series vs when in parallel so in S/P you have to look at both ways.