600W Solar - Getting 420W Max
I have 5 120W Solar panels flat mounted. I am in Mission TX at a FHU park for the winter. It is giving me a good place to test my system out. Back in the NE there are to many trees. I have seen a max ...
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No, I call that cheating. You changed the ground rules. It's not an apples to apples comparison.
Some very smart people determined you need 36 cells to configure a 12V panel. If you have a 24V battery then you need 72 cells.
I believe your "24V panel" has only 60 cells. It is not a 24V panel, it's more like a 20V panel.
What does that mean? Since panel power does not change, if voltage goes down by 20% then current must go up by 20%. In other words, the "24V panel" has larger cells that produce more current.
You are giving the pwm configuration a 20% advantage from the get-go and then concluding pwm is better.
Your test and conclusion is one of smoke and mirrors.
Some very smart people determined you need 36 cells to configure a 12V panel. If you have a 24V battery then you need 72 cells.
I believe your "24V panel" has only 60 cells. It is not a 24V panel, it's more like a 20V panel.
What does that mean? Since panel power does not change, if voltage goes down by 20% then current must go up by 20%. In other words, the "24V panel" has larger cells that produce more current.
You are giving the pwm configuration a 20% advantage from the get-go and then concluding pwm is better.
Your test and conclusion is one of smoke and mirrors.
BFL13 wrote:
And that was all "apples to apples"--same panel, same wires, same batts , same day and time of day.
