Solar charge regulator

440

07:37:48

Source : http://www.talkingelectronics.com/projects/200TrCcts/200TrCcts.html
The pot is adjusted so the relay drops-out at 13.7v
The charger will turn ON when the voltage drops to about 12.5v.
The 100R Dummy LOAD will absorb 3.25 watts and that is the 
maximum wattage the panel will produce with 100R load.

I've added two switches to discharge the hold capacitor and the "battery". These are for testing purposes only. 

published 10 years ago

flowDAQ

10 years ago

I think the solar panel simulation could be improved. They act more like a current source once voltage is taken bellow the maximum power point. For a three watt 36 cell solar panel (e.g. SLP003-12, because I have it in hand) I would use 180mA current source in parallel with a 20V Zener (which gives the open circuit voltage) and then 16.5 Ohm to the push button. The 16.5 Ohm is the panels internal resistance. Once the panels output voltage drops bellow 17V the Zener will stop conducting.

flowDAQ

10 years ago

If I add 50 Ohm to the discharge switch I see the battery (1F cap in the simulation) drops bellow 9V before it starts to charge, and that would severely damage most lead acid batteries.

Karlberg

10 years ago

Thanks for the input. That would make this a more valid simulation.

Jonathan0612

10 years ago

Para que sirve?

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