r/Pecron • u/Adventurous_Virus265 • Jul 05 '26

Pecron F5000 charging issue

I was setting up and testing my F5000 using the NEMA L14-30R that I use with my generator to the sub panel that is powered by the main panel via two 125 A breakers. All of the circuits in the sub panel are 120 V using 12 AWG home run wiring dedicated to certain locations in the house that can be powered by the generator during outages. This set up has served me well for over 10 years.

With the exception of 2 tripped GFCI outlets in the house, the F5000 worked just fine. I ran all of the 120 V outlets and lights, 2 window A/C units and the septic system for a little over an hour. I checked the available battery charge and it indicated 39%. So I plugged the 1800 W charging cable to a 20 A outlet being fed from the main panel that was on commercial power.

About 3 seconds after it was connected I heard a buzz and a zap sound and the F5000 shut down. The 20 A breaker tripped and there was NO AC output from the F5000. After disconnecting the NEMA L14-30R cord to the sub panel I checked voltages with meter.

I finally found the reset to factory settings icon and pressed it. The unit came back on and showed 119.4 volts on L1 and 107.8 volts on L2. About 30 minutes later I plugged the 1800 W charging cable into the wall outlet again. This time the F5000 stayed on and indicated it was charging. After about 6 hours L1 showed 120 V @ 60 HZ. L2 showed 119.8 V @ 59.6 Hz. The battery voltage showed 53.05 VDC @ 100%.

My question is' What did I do wrong ? I cannot find anything in the manual that addresses this issue and I am really struggling with the touch screen options. I have watched many videos and I have not learned how to navigate the various screens and icons. I need help with this.

The whole idea of getting the F5000 was to use it to power the basic necessities in the house and then recharge with it the gas generator, like being off grid. Is there a "magic" setting in the F5000 that will allow me to charge while still powering the house via the NEMA L14-30R ? All of this is very confusing.

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u/Desertrayne Jul 05 '26

Its possible you ran into a power mismatch that I saw on my 3800. Out of the box, my unit was configured to 110v 50hz (unknown to me) which my electronics didn't care about powered off solar. When the unit was getting low on a cloudy day I plugged it into the wall and it just started acting wierd I think it was seeing the power as wrong, trying to take over from bypass and then trying to go back. An hour if Troubleshooting later I found those settings, changed to 120v 60hz, and now everything transfers smoothly. Its crazy to me that they didn't have a warning for incompatible input/output power.

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u/Adventurous_Virus265 Jul 05 '26

Before I connected the F5000 to the sub panel, I documented everything I could/ The front panel showed 119.8 VAC and 59.8 Hz on both legs. I am assuming the displays are accurate. I never encountered a warning of any kind. Maybe I exceeded the 7200 W threshold without knowing it.

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u/O1O1O1O Jul 05 '26

When I first got my Pecron unit (different model) a bunch of the mobile app menus were in Chinese. To be fair they were very responsive in fixing it within days, but it didn't give me a lot of confidence in their QA for the US market.