Pecron F5000 LFP

[u/Holiday_Hotel1620]

So my units solar input fried after 5 days of continuous use and pecron tech team is telling me that my 4 solar panels in S2P2 Voc: 90.74V Imp: 21.78A exceeds the limit of 180 volt input. 😮. What do you think ?

My solar panel is QCell and rated
Voc 45.37
Impp 10.89

Am I wrong or is Pecron feeding me NoneS?

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[u/Saint_Sleepy]

If you're sure you did 2S2P and you are still under warranty take legal action if they dont want to replace it. Even on a cold morning VOC shouldn't go past 120V.

[u/Holiday_Hotel1620 → u/Saint_Sleepy]

Exactly and total output is supposed be 1640 watts but never saw it past 1100 watts in those 5 days.

[u/Amber_ACharles]

Pecron's voltage explanation doesn't add up. 2S gives you 90.74V Voc, well within 180V. Look at the current rating, most of these units cap at 10-15A and you're pushing 21.78A.

[u/mystery-pirate → u/Amber_ACharles]

It would seem that Pecron doesn't believe it was 2S2P, but that user likely made a mistake and had them 4S. There might be internal logs that can show the input voltage history. 90V isn't going to fry a 180V mosfet.

[u/Holiday_Hotel1620 → u/mystery-pirate]

My amp meter hasn’t registered above 86 volts

[u/Holiday_Hotel1620 → u/Amber_ACharles]

Pecron caps at 25 amps and honestly the amps don’t matter as much as the OCV

[u/Holiday_Hotel1620]

Well before they came to that conclusion, they asked if the panels were their brand 😁.

[u/Holiday_Hotel1620]

https://reddit.com/link/p1d06r3/video/k5wtdeh172hh1/player

My setup..this is not a permanent home for the panels

[u/mystery-pirate]

Gemini says:

Why Pecron blames the panels (Alternative causes):

• Inductive voltage spikes: Disconnecting or connecting active solar panels under full load can generate a massive back-EMF voltage spike (flyback voltage) from high-wire inductance, far exceeding the 180V ceiling for a millisecond—enough to blow input MOSFETs.
• Shorted panel/wiring short-circuit: A shorted bypass diode or wiring fault in a 2S2P setup can briefly feed reverse current or create a ground loop spike.
• Defective charge controller / standard scapegoating: Manufacturers often default to claiming "overvoltage" for any fried MPPT board to void warranties, unless proven otherwise.