Hi all,
I have a horsebox here in the UK, I have 2 solar panels on the roof to charge the truck batteries (24v system) with one cheapy solar controller that came with the panels. This works as expected. I however also have a 12v 110amp leisure battery that all the lights etc run off that is always draining, that i would like to keep topped up from the solar panels.
I currently have a split charge relay from the 2nd battery of the 24v truck batteries (they're 12v each in series) - this used to trigger when the truck was running to charge the leisure batteries. For some reason that has stopped working and i'm tempted to rip it out as it's only useful when i'm out and about driving the horsebox (once every 2 weeks at most for short journeys)
What I'm hoping is that there is a way of using existing 2 solar panel circuit to also charge the 12v system. I know that I can't used mixed voltages on one controller, so what are my options? I don't want to spend a fortune on voltage converters etc, but some form of intelligent battery charging would be nice.
I have another spare charge controller, i'm assuming I cannot use the 2nd output from the 1st controller (the one that charges the 24v system) and connect to the input of the 2nd controller (as if it's the solar panels) and then output to the 12v battery?
Thanks
Ryan
I have a horsebox here in the UK, I have 2 solar panels on the roof to charge the truck batteries (24v system) with one cheapy solar controller that came with the panels. This works as expected. I however also have a 12v 110amp leisure battery that all the lights etc run off that is always draining, that i would like to keep topped up from the solar panels.
I currently have a split charge relay from the 2nd battery of the 24v truck batteries (they're 12v each in series) - this used to trigger when the truck was running to charge the leisure batteries. For some reason that has stopped working and i'm tempted to rip it out as it's only useful when i'm out and about driving the horsebox (once every 2 weeks at most for short journeys)
What I'm hoping is that there is a way of using existing 2 solar panel circuit to also charge the 12v system. I know that I can't used mixed voltages on one controller, so what are my options? I don't want to spend a fortune on voltage converters etc, but some form of intelligent battery charging would be nice.
I have another spare charge controller, i'm assuming I cannot use the 2nd output from the 1st controller (the one that charges the 24v system) and connect to the input of the 2nd controller (as if it's the solar panels) and then output to the 12v battery?
Thanks
Ryan
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