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Voltage Runaway After Solar Panel Install

PostPosted: Mon May 21, 2012 10:42 am
by malon
I installed some solar panels recently. During our first long engine run, the regulator gave "Voltage Runaway" I removed the fuse from the solar panel wires to remove the solar charging source, and the alarm stopped.

The regulator seems to have worked as designed, so my question is, how can I prevent voltage runaway, while keeping the solar panels connected? Is there a widely accepted way of doing this?

Thanks
Sean

Re: Voltage Runaway After Solar Panel Install

PostPosted: Mon May 21, 2012 3:00 pm
by Coulomb
You'll have to disconnect the panel to avoid overcharge. You can automate that using a relay.

Re: Voltage Runaway After Solar Panel Install

PostPosted: Tue May 22, 2012 8:51 am
by malon
Thank you Coulomb. Good to know that I can automate with a relay. Any advice on what sort of relay to use or how to spec it would be much appreciated. I'm an electrical newbie.
Thanks
Sean

Re: Voltage Runaway After Solar Panel Install

PostPosted: Tue May 22, 2012 3:22 pm
by malon
I contacted the manufacturer of the controller, Blue Sky Energy. The solar charge controlller voltage limit is 14.4 volts. They recomended adjusting the threshold of the regulator alarm to 14.5 or 14.6 volts. Is that something that can be adjusted?

Thanks
Sean