Author Topic: Mnspd300vdc led on but mostly off  (Read 147 times)

mahendra

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Mnspd300vdc led on but mostly off
« on: March 22, 2021, 11:14:54 PM »
So I installed a Mnspd300vdc to an 12 array combiner and noticed that as the sun changes sometimes the spd led would sometime illuminate but mostly stays off. What can cause this my only guess is a floating ground. Any other thoughts?
1.5kw on Midnite classic 150(whizbang jr.) networked 0.660kw on classic lite 200 ,180ah CALB Lifepo4 48v battery bank,123SmartBMS bms(top balanced) Outback vfx3648

mahendra

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Re: Mnspd300vdc led on but mostly off
« Reply #1 on: March 26, 2021, 12:57:04 PM »
OK guys no need for a reply turns out it is a floating ground issue from a stripped screw thread in array panel. So issue solved when ground conductor from spd was placed on another available ground bus terminal.
1.5kw on Midnite classic 150(whizbang jr.) networked 0.660kw on classic lite 200 ,180ah CALB Lifepo4 48v battery bank,123SmartBMS bms(top balanced) Outback vfx3648

KyleM

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Re: Mnspd300vdc led on but mostly off
« Reply #2 on: March 26, 2021, 02:11:48 PM »
In hindsight that is so obvious .....   but that must have been a bear to find?
Thanks for the update.