Renogy: How to Troubleshoot Your Solar Panels

Hello! Welcome to the Renogy Troubleshoot Series.

This short video will go over how to test your panels and determine whether or not they may be defective.

Thanks for tuning in! Please subscribe, and let us know what you think in the comments. Have suggestions on other videos you’d like to see? Comment, and we’ll be sure to take it into consideration. Have a sunny day.

We’re open Monday-Friday 8:00 a.m.-5:00 p.m (PST).
Give us a call at 1-909-287-7111 for any questions you may have, or for a free quote!
Email us at for further questions

Visit our website:

Stay connected with us at:


  1. Already disappointed. Ordered a simple charge controller and it is still travelling the country with USPS with no ETA…

  2. She mentions " you may have a bad diode" you can not test that out just pointing it at the sun with open circuit or current. You need to be able to test it while partially shaded and a load on it, and for those that called someone in the comments " intelligent" for suggesting a load, he is right. a load meaning connected to a charge controller. because the MPPT will drop the voltage down to about half in order to try to get the most wattage out of it. If your diodes are fine, the voltage will be " normal" Its easier to check with a series connection, because if one panel has a bad diode it will bring the entire string voltage down. I had to learn and figure this out myself. Because I called Renogy and explained that my panels dropped voltage from being 60volts to 14 volts after adding a 4th panel, the voltage should be 80 volts ( give or take a bit) and the MPPT of that is roughly 68 volts at 5.9 A- 6 A ( in optimal conditions). But with that bad diode it was bringing the panel string down to 14 volts and providing only 10 watts to 25 watts. I went one by one I removed a panel, until the MPPT was where it was supposed to be. The " technical support" I got from Renogy was ( and this is verbatim) " Apparently since the panel is new it needs to adjust" If I would have listened to that, I would still be in the same boat. She also said since I had my panels connected in series that Renogy only recommends charging 12 volt, so charging 24 volt could also be the problem….well I was not charging 24 Volts and had to explain to her how an MPPT charge controller worked…more voltage lower current DC to DC conversion and so on. Anyways, I opened up the junction box on the back of the problem panel, and it had had writing on the panel inside and the diodes you could tell had been recently either messed with or damaged and had either flux or a burned look on the solder, I don't know if this was a return of if someone at Renogy randomly writes inside the junction box of panels. The other panels were checked to compare, and they had no writing, and the diodes were in tact ( although the solder job on ALL the panels were sloppy, and also the problem panel had a piece of loose metal or solder inside, that could have also been a cause of the defect or damage. If you register your panel online with them for warranty GOOD LUCK…. well that's my non professional opinion. The panels that were not defective or damaged work Very well, even over their rated wattage, but it really stinks when you do receive a damaged panel and try to get "technical support" and the person who answers the phone knows nothing besides the script in from of them. They also panic when you tell them you have a charge controller other than Renogy ( even though you are calling about Renogy Solar panels).

  3. i have my Voyager flashing B01 .. Batteries were tested , perfect … I have 2 100w flex panels .. Need HELP please .. Thanks

  4. What about wiring two panels together when they are facing the direct sunlight and what order to connect and what problems if exist?

  5. Renogy is certainly cheaper then Zamp for example but they have no support. Before I bought their units I called to see if there were spare parts like Zamp provides – no replacement parts.Then one of their panels blew a diode so I called and they had no record of any of my 4 – 100watt panels. I asked why they have registration cards which i sent in. To give you a discount card, But … no they don’t track your serial numbers. So I provided the purchase info and even one month later I have never receive the tech followup.

    The panels work fine when they work but don’t expect any warranty support. Buy at your own risk and presume the panels are disposable.

  6. You need to have a load on the panel when you test it. You don't just plug your multi meter directly into the panel.

  7. If you found your panel is defective, Renogy won't honor your warranty if you bought it from Amazon Warehouse deal !!

Leave a comment

Your email address will not be published.