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Old 07-15-2015, 09:35 PM   #1
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MPPT controller

l have a solar set up that was already installed on our used TT. The indicator is no longer lit up. How do I find out if the controller is working?

thank you
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Old 07-15-2015, 09:57 PM   #2
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Can you please tell use what controller you have. A picture may help as well.
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Old 07-15-2015, 10:01 PM   #3
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MPPT Solar Charger Controller 12V/24V. The solar panel is a 175 watt. I do not have a good picture to attach.
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Old 07-16-2015, 09:08 AM   #4
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So is it the whole screen that is not lighting up? You are hooked up to your battery and solar panels? you need to make sure that you never have just the solar panels hooked up without the battery as this can damage the controller.
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Old 07-16-2015, 12:42 PM   #5
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My MPPT won't work without batteries hooked up. I just get a blank screen.
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Old 07-16-2015, 01:43 PM   #6
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We did find that one connector bolt was loose on one of the battery terminals. Would this have fried the controller?
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Old 07-16-2015, 10:40 PM   #7
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It is possible, can you disconnect the solar panels then the battery , then reconnect just the battery and see if you get a display. If not your controller may be toast.
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Old 07-16-2015, 10:53 PM   #8
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The controller MUST be connected to the batteries BEFORE the panels are connected to the controller. The ''loose connection'' at your battery could well have fried your controller.
What amp is your controller?
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Old 07-17-2015, 12:03 PM   #9
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My apologies for not responding sooner. I got stuck at work for 16 hours yesterday and couldn't do anything when I got home after 11pm last night. So this morning I started to do some unwiring and investigating, but as of yet have no answers. I did unwire everything and then wire everything back up to the battery terminals, still no lights.

I am including 4 pictures because of the questions asked.

Happy Vibe - you asked if the screen isn't lighting up - there are no indicator lights lighting up.

We haven't done anything with the solar panel connections. Everything has been working properly.

You also asked if there was a way I could only connect the controller to the battery. Reference the one picture of where all the wires go into the controller, everything is sealed. How would I disconnect the solar panels (2 middle wires)? There are splices where everything was connected, but these are all sealed. Should I unseal the splices?

Blackhat6mike - you asked what amp my controller is - I believe it is a 15A. Reference the one picture I included.


Is there a way to see if the solar panel is charging?
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Old 07-17-2015, 12:15 PM   #10
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I would suggest using a voltage meter to see if you are getting power from the panels to the controller, etc. Check the batteries as well. Also check for fuses, I'd expect you would have a fuse between the controller and batter.
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