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Post Info TOPIC: Pwm vs Mppt
oldtrack123


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RE: Pwm vs Mppt
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T1 Terry wrote:
oldtrack123 wrote:
vik351 wrote:

I have a set of panels doing nothing at the moment on a set of wheels ...!!!

vik...& expensive 

 

 

 That is only one set of panels  ,panels with varying specs would also be required.

 Then understanding all that , look at a full range of  operating conditions & Australia

Panels :

Designed mpp

MPP @ varying  panel temps [ big differences between Tassy  & NW Australia ]

 

Panel irradiation [light intensity on panel] varies greatly at time of day & location

Panel combinations [series  & parallel]

 Battery :

Battery types 

Battery state of charge  voltage[very important when comparing MPPs to PWMs ]

 Controlling all the conditions so all the test can be done under exactly the same  controlled conditions 

I could go on ,but the above  gives some indication of how real comparative tests need to be carried out' 

It is not just a question of changing regulators for a day or two & see which performs best 

Australia is a big country with widely varying  conditions .

What happens in  one location throughout the year ,say Tassy ,will be  totally different  to the northern parts 

So how do you think you can do a comparison between the two controller types Peter? Obviously a power supply on a lab bench isn't going to duplicate the conditions you just mentioned, it can't even duplicate a single solar panel's operation.

The battery SOC can easily be duplicated so that is not an issue. Panels that will fit on an RV roof can be easily duplicated or I can even reroute the cabling to change from parallel to series strings if that would solve that problem. I was thinking of a mths recorded data for each type of controller and a small panel in short circuit or high resistance load to measure irradiance levels to provide data to match solar conditions between each type of controller testing.

So, rather than just saying it can't be done, add any other test parameters you think will be required to do a side by side test?

 

T1 Terry 

 Read my post again Terry

I did not say it cannot be done!

What I tried to show , is  that it is beyond the capability of ANY back yard experimenter

That what I have been saying all along.

I am not sure why you keep harping back to bench top power supplies

Where did I suggest any such thing? what purpose would it serve?

Did you try that ,not realizing it cannot simulate a battery @ various SOC?????biggrin

In fact in no way simulate a battery

I think others  [those who have some knowledge of such things ] will well understand .

 but the T1 true believers will not ,but they do not need to worry, because as I have said many times  you have experimented until you found a set up that is very suitable for use with your LI BATTERIES



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T1 Terry


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Why the put down attacks Peter? The power supply is the preferred method used by those attempting to show how much better an MPPT controller is than a PWM controller and all I was saying was that it did not represent real world solar inputs.
So please bury the hatchet and let's try to get a test regime that the general RV user can relate to so we can set up a test to show which controller does a better job or if there is no real gain to be had. Surely that is what all this arguing is about and wouldn't this settle it once and for all?

T1 Terry

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T1 Terry


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Hmmm...... Seems the MPPT choir has lost its voice ..... or are not game to put their theories to the test ..... which do the members reckon is the more likely :lol:

T1 Terry

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Jaahn


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T1 Terry wrote:

Hmmm...... Seems the MPPT choir has lost its voice ..... or are not game to put their theories to the test ..... which do the members reckon is the more likely :lol:

T1 Terry

 Terry you do not know when to quit. Give us a break disbelief

Jaahn 



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Ron-D


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He will never get the message ,just hammers you into the ground with huge boring posts,and thinks hes the winner...



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Kebbin


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Now I understand why you were given the boot, your just an antagonist.

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Kebbin
T1 Terry


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Jaahn wrote:
T1 Terry wrote:

Hmmm...... Seems the MPPT choir has lost its voice ..... or are not game to put their theories to the test ..... which do the members reckon is the more likely :lol:

T1 Terry

 Terry you do not know when to quit. Give us a break disbelief

Jaahn 

I was trying to put this nonsense argument between the 2 types of controller to the test so members here could judge which was better based on facts rather than faith they weren't being mislead by those who have never actually put their ideas and theories to the test.

I thought the opportunity to put both ideas to the test to get a definite answer would appeal to members here, but apparently not.

 

T1 Terry



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You can lead a head to knowledge but you can't make it think. One day I'll know it all, but till then, I'll keep learning.

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Baz421


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Comparison,,,

120W of panels and 100aH Yuasu battery running truck fridge.

2 PMW controllers very average performance,,, MPPT far better in practice.

PMW just brought voltage up quickly IMHO before fully charged.

My 2 cents worth.

PS Just converted van to MPPT as well. OLd PMW died and cooked battery,,, see separate post today.

Cheers Baz



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T1 Terry


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Baz421 wrote:

Comparison,,,

120W of panels and 100aH Yuasu battery running truck fridge.

2 PMW controllers very average performance,,, MPPT far better in practice.

PMW just brought voltage up quickly IMHO before fully charged.

My 2 cents worth.

PS Just converted van to MPPT as well. OLd PMW died and cooked battery,,, see separate post today.

Cheers Baz

You mentioned in the other post the PWM controllers were 11yrs old and no mention of quality of either the PWM controllers or the MPPT controller. The bit about bringing the batteries up quickly before fully charged says more about the condition of the batteries rather than the controller ... just my 2 cents worth

 

T1 Terry 



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You can lead a head to knowledge but you can't make it think. One day I'll know it all, but till then, I'll keep learning.

Any links to any sites or products is not an endorsement by me or do I gain any financial reward for such links 
Baz421


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T1 Terry wrote:
Baz421 wrote:

Comparison,,,

120W of panels and 100aH Yuasu battery running truck fridge.

2 PMW controllers very average performance,,, MPPT far better in practice.

PMW just brought voltage up quickly IMHO before fully charged.

My 2 cents worth.

PS Just converted van to MPPT as well. OLd PMW died and cooked battery,,, see separate post today.

Cheers Baz

You mentioned in the other post the PWM controllers were 11yrs old and no mention of quality of either the PWM controllers or the MPPT controller. The bit about bringing the batteries up quickly before fully charged says more about the condition of the batteries rather than the controller ... just my 2 cents worth

 

T1 Terry 

Terry,,, this post is truck (Landcruiser UTe) other post was van. PWM on TRUCK brought new Yuasu battery up very quick

 



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Why is it so? Professor Julius Sumner Miller, a profound influence on my life, who explained science to us on TV in the 60's.
Baz421


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T1 Terry wrote:
Baz421 wrote:

Comparison,,,

120W of panels and 100aH Yuasu battery running truck fridge.

2 PMW controllers very average performance,,, MPPT far better in practice.

PMW just brought voltage up quickly IMHO before fully charged.

My 2 cents worth.

PS Just converted van to MPPT as well. OLd PMW died and cooked battery,,, see separate post today.

Cheers Baz

You mentioned in the other post the PWM controllers were 11yrs old and no mention of quality of either the PWM controllers or the MPPT controller. The bit about bringing the batteries up quickly before fully charged says more about the condition of the batteries rather than the controller ... just my 2 cents worth

 

T1 Terry 

Controllers on truck were new ones < 6 months old. Battery charging quickly was brand new Yuasu battery

 



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Why is it so? Professor Julius Sumner Miller, a profound influence on my life, who explained science to us on TV in the 60's.
T1 Terry


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Interesting, thanks Baz, so the PWM controller brought batteries up faster than the MPPT controller? Or am I reading that wrong confuse

 

T1 Terry



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You can lead a head to knowledge but you can't make it think. One day I'll know it all, but till then, I'll keep learning.

Any links to any sites or products is not an endorsement by me or do I gain any financial reward for such links 
oldtrack123


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T1 Terry wrote:

Interesting, thanks Baz, so the PWM controller brought batteries up faster than the MPPT controller? Or am I reading that wrong confuse

 

T1 Terry

 

Interesting, thanks Baz, so the PWM controller brought batteries up faster than the MPPT controller? Or am I reading that wrong confuse

 

T1 Terry

Before you get too excited ,best read it all again 

Especially this bit

"Terry,,, this post is truck (Landcruiser UTe) other post was van. PWM on TRUCK brought new Yuasu battery up very quick"

Note 

NEW BATTERY no doubt almost fully charged

 



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Baz421


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oldtrack123 wrote:
T1 Terry wrote:

Interesting, thanks Baz, so the PWM controller brought batteries up faster than the MPPT controller? Or am I reading that wrong confuse

 

T1 Terry

 

Interesting, thanks Baz, so the PWM controller brought batteries up faster than the MPPT controller? Or am I reading that wrong confuse

 

T1 Terry

Before you get too excited ,best read it all again 

Especially this bit

"Terry,,, this post is truck (Landcruiser UTe) other post was van. PWM on TRUCK brought new Yuasu battery up very quick"

Note 

NEW BATTERY no doubt almost fully charged

 

Yep voltage came up too quick I believe BEFORE battery was fully charged.  Yep was new battery Ralph. 



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Why is it so? Professor Julius Sumner Miller, a profound influence on my life, who explained science to us on TV in the 60's.
T1 Terry


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Date:
Permalink  

Baz421 wrote:
oldtrack123 wrote:
T1 Terry wrote:

Interesting, thanks Baz, so the PWM controller brought batteries up faster than the MPPT controller? Or am I reading that wrong confuse

 

T1 Terry

 

Interesting, thanks Baz, so the PWM controller brought batteries up faster than the MPPT controller? Or am I reading that wrong confuse

 

T1 Terry

Before you get too excited ,best read it all again 

Especially this bit

"Terry,,, this post is truck (Landcruiser UTe) other post was van. PWM on TRUCK brought new Yuasu battery up very quick"

Note 

NEW BATTERY no doubt almost fully charged

 

Yep voltage came up too quick I believe BEFORE battery was fully charged.  Yep was new battery Ralph. 

 From the opening post

"

Comparison,,,

120W of panels and 100aH Yuasu battery running truck fridge.

2 PMW controllers very average performance,,, MPPT far better in practice.

PMW just brought voltage up quickly IMHO before fully charged."

 

Last line prompted me to get a better clarification Peter, not quite sure how you managed to get your interpretation from what was written but it's not how I read it, so I'm guessing the OP will be the person best suited to clarifying just what he meant.

 

T1 Terry



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You can lead a head to knowledge but you can't make it think. One day I'll know it all, but till then, I'll keep learning.

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Bill B


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Here we go again no

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Bill B
T1 Terry


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Bill B wrote:

Here we go again no

Not a hope Bill B, not falling for Peter's tactics again wink

 

T1 Terry 



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You can lead a head to knowledge but you can't make it think. One day I'll know it all, but till then, I'll keep learning.

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