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MSEE, PE -
I think you are misreading the description or do not really understand the terms you are using.well this site
describes a good way to build solar panels using caps so if others are doing it than my idea must in some little way work,
Almost any DC to DC convertor design will use capacitors, although you can also build a DC to DC convertor for use as a battery charge controller without using capacitors for power handling.
But you cannot build a DC to DC convertor out of capacitors without including switching elements like transistors (including those integrated into more complicated IC packages.)
So, yes you can build a DC to DC convertor using capacitors, but characterizing it that way would be like me saying that I can build a DC to DC convertor using wires. An accurate statement, but it does not say anything useful.
SunnyBoy 3000 US, 18 BP Solar 175B panels.Comment
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yer i dont know if i can change it now but anyway i am trying anyway i can boost to get pwm charging more constant instead of for like 5 minits and then stopps lol i cant get any more big panels but i cud get smaller £20 panels and i cant offord an mppt charge controller right now!I think you are misreading the description or do not really understand the terms you are using.
Almost any DC to DC convertor design will use capacitors, although you can also build a DC to DC convertor for use as a battery charge controller without using capacitors for power handling.
But you cannot build a DC to DC convertor out of capacitors without including switching elements like transistors (including those integrated into more complicated IC packages.)
So, yes you can build a DC to DC convertor using capacitors, but characterizing it that way would be like me saying that I can build a DC to DC convertor using wires. An accurate statement, but it does not say anything useful.
i got 20 16 volt caps coming real cheap so i will put a switch on this so it will boost wen its not enough to charge and then eventually auto switch off the caps wen there not needed!Comment
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An interesting thought, but unless your PWM CC is defective, the capacitors should not make much difference at all in the results. It is correct that letting the panels charge the capacitors during the time that the PWM switch in the CC is closed will allow more current to flow from the panels through the CC when the PWM switch closes.
But what you are not considering is that
1. when the CC is in bulk mode (where you need the maximum current) the PWM switch is going to be closed constantly, letting the maximum panel current through. And
2. when the CC is regulating the voltage to the battery, the current cannot go any higher without increasing the battery voltage so your capacitor boost will be useless.
You have taken a potentially valid concept and then ignored how the PWM CC actually works when trying to apply it.
It may help if you think of the PWM CC as using PWM to regulate current from the panels, not voltage. Any particular current value will produce a corresponding battery voltage. But the current cannot exceed that produced by the panel full time.Last edited by inetdog; 03-23-2014, 09:32 PM.SunnyBoy 3000 US, 18 BP Solar 175B panels.Comment
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you mean all £2.00 of it omg what shall i do, well we will see if it works il post back here, i think it will but time will tellComment
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Post back
Please do post back your results, I am getting a lot of chuckles from your messages.Originally posted by multimedia
Bruce RoeComment
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