Good Sam Club Open Roads Forum: Tech Issues: Solar Charging and Amp Hours
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DarkSkySeeker

Freestone, California

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Posted: 04/20/20 04:56pm Link  |  Quote  |  Print  |  Notify Moderator

And the power output of the panel drops down? Eventually meaning a 100 watt panel no longer puts out any power?


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red31

Dallas

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Posted: 04/20/20 05:17pm Link  |  Quote  |  Print  |  Notify Moderator

yes, cuz it is not connected to anything!

excess power is not made, the panel is disconnected from the controller.
The on/off connection to the panel is done at high freq, the OFF time gets longer and longer to limit power to the controller/battery.

add a big load and then the battery is getting very little but the controller allows the extra to run the load.

time2roll

Southern California

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Posted: 04/20/20 05:21pm Link  |  Quote  |  Print  |  Notify Moderator

DarkSkySeeker wrote:

And the power output of the panel drops down? Eventually meaning a 100 watt panel no longer puts out any power?
Power (watts) = amps x volts..... Zero amps, zero power.


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DarkSkySeeker

Freestone, California

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Posted: 04/20/20 05:29pm Link  |  Quote  |  Print  |  Notify Moderator

Thank you for this help. In my mind, I thought only the battery side of the controller was modulated. Now I understand the charge controller allows current flow from the panel in the same way.

full_mosey

Oklahoma

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Posted: 04/20/20 09:49pm Link  |  Quote  |  Print  |  Notify Moderator

DarkSkySeeker wrote:

Thank you for this help. In my mind, I thought only the battery side of the controller was modulated. Now I understand the charge controller allows current flow from the panel in the same way.


Amps are DRAWN by the consuming device. That is why your 1 Amp incandescent bulb does not explode when connected the same battery that can send 200A to the starter motor. You explode the bulb by applying too much Voltage.

HTH;
John

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