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Comments on: what happens if i connect a solar panel to a battery thats lower than the operating voltage? http://www.xfsolarpanels.com/blog/solar-panel/what-happens-if-i-connect-a-solar-panel-to-a-battery-thats-lower-than-the-operating-voltage 'Cause Not Paying For Energy Is Fun! Sat, 11 Feb 2012 14:06:56 +0000 http://wordpress.org/?v=2.7 hourly 1 By: ericnutsch http://www.xfsolarpanels.com/blog/solar-panel/what-happens-if-i-connect-a-solar-panel-to-a-battery-thats-lower-than-the-operating-voltage/comment-page-1#comment-4794 ericnutsch Mon, 28 Sep 2009 22:47:59 +0000 http://www.xfsolarpanels.com/blog/solar-panel/what-happens-if-i-connect-a-solar-panel-to-a-battery-thats-lower-than-the-operating-voltage#comment-4794 You would typically have a blocking diode in place to prevent battery discharge (even cheep panels have this). Your 9v panel is actually at 11.5v when there is no current. So you may be able to very slightly trickle charge a dead battery. I doubt you will be able to witness any results however. The simple solution is to purchase a 12v panel :) Another solution, if you do not wish to purchase a new panel, is to get a charge controller. A charge controller can boost the voltage to the proper charging values and protects the batteries when they are full. Check them out at: http://www.aurorapower.net/products/list/1/categoryid/13/level/a.aspx Best of luck to you!<br><b>References : </b><br>Im a Mechanical Engineer for an alternative energy company http://www.aurorapower.net/ You would typically have a blocking diode in place to prevent battery discharge (even cheep panels have this).

Your 9v panel is actually at 11.5v when there is no current. So you may be able to very slightly trickle charge a dead battery. I doubt you will be able to witness any results however.

The simple solution is to purchase a 12v panel :)

Another solution, if you do not wish to purchase a new panel, is to get a charge controller. A charge controller can boost the voltage to the proper charging values and protects the batteries when they are full.

Check them out at:
http://www.aurorapower.net/products/list/1/categoryid/13/level/a.aspx

Best of luck to you!
References :
Im a Mechanical Engineer for an alternative energy company
http://www.aurorapower.net/

]]> By: Yaacov http://www.xfsolarpanels.com/blog/solar-panel/what-happens-if-i-connect-a-solar-panel-to-a-battery-thats-lower-than-the-operating-voltage/comment-page-1#comment-4793 Yaacov Mon, 28 Sep 2009 22:07:59 +0000 http://www.xfsolarpanels.com/blog/solar-panel/what-happens-if-i-connect-a-solar-panel-to-a-battery-thats-lower-than-the-operating-voltage#comment-4793 The panel rating is supposed to be higher than the battery rating And yes it is possible but highly not recommended to connect the panel directly to the battery, it might open the door to the possibility of Over Current (too much current). It is absolutely recommended to have a Charge Controller to handle the current To get more insight you may view http://www.solar-energy-for-home.com/charge-controller.html<br><b>References : </b><br> The panel rating is supposed to be higher than the battery rating
And yes it is possible but highly not recommended to connect the panel directly to the battery, it might open the door to the possibility of Over Current (too much current).
It is absolutely recommended to have a Charge Controller to handle the current
To get more insight you may view http://www.solar-energy-for-home.com/charge-controller.html
References :

]]> By: veggie boy http://www.xfsolarpanels.com/blog/solar-panel/what-happens-if-i-connect-a-solar-panel-to-a-battery-thats-lower-than-the-operating-voltage/comment-page-1#comment-4792 veggie boy Mon, 28 Sep 2009 21:25:59 +0000 http://www.xfsolarpanels.com/blog/solar-panel/what-happens-if-i-connect-a-solar-panel-to-a-battery-thats-lower-than-the-operating-voltage#comment-4792 I suspect it may "reverse bias" to solar panel so that it does not contribute any charge at all, unless the 12V battery is COMPLETELY dead. Even then, it would not give the battery a useful charge. Sorry; you need a 12V solar panel.<br><b>References : </b><br> I suspect it may "reverse bias" to solar panel so that it does not contribute any charge at all, unless the 12V battery is COMPLETELY dead. Even then, it would not give the battery a useful charge. Sorry; you need a 12V solar panel.
References :

]]> By: Leciv http://www.xfsolarpanels.com/blog/solar-panel/what-happens-if-i-connect-a-solar-panel-to-a-battery-thats-lower-than-the-operating-voltage/comment-page-1#comment-4791 Leciv Mon, 28 Sep 2009 21:11:59 +0000 http://www.xfsolarpanels.com/blog/solar-panel/what-happens-if-i-connect-a-solar-panel-to-a-battery-thats-lower-than-the-operating-voltage#comment-4791 voltage sources with different voltages in paralell will probably cause a fire.<br><b>References : </b><br> voltage sources with different voltages in paralell will probably cause a fire.
References :

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