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@crossy and rodrik: OMG. Please forget I ever asked and thank you so much for asking me to re-check. I did not think I could get this wrong, but I surely did. The battery terminal right next to it is red for - and black for +, so I just assumed it would be the same. Just an explanation, no...

@AntronX: OMG. Please forget I ever asked. I did not think I could get this wrong, but I surely did. My SunnyBoy had plug terminals, so I never thought about the polarity of solar panels much and since the battery terminal right next to it is red for - and black for +, I just assumed it would be...

It's been some time since the last post in this thread, but has anyone found a cure yet? I just connected a solar array to a Growatt SPF 5000 and get the same strange result as GaryB. The open circuit voltage (Voc) is confirmed 400V, the short circuit current (Isc) calculated 8A. As soon as I...

Hello Guys, My off-grid setup consists of only one 3kW solar array, a Growatt hybrid inverter (SPF 5000ES) and a 13kW battery. To use the full potential of the SPF5000, I want to add a second solar array, but that inverter can only handle one. A Growatt 5500MTL-S that can handle two arrays...

Thank you very much, I didn't know that. What a great way to tell the GT to shut down. I always wondered how they do that. So this setup would work with a MultiPlus, or if the SPF 5000ES could do frequency shifts, which you say it can't right?. I was kind of hoping that the Growatts could...

With solar panels connected, I can measure only around + 1.5V DC at the PV terminals in the middle of a sunny day, although the unconnected open circuit voltage of the array is 400V (Voc) and the short circuit current is around 8A (Isc). I measured both, just to be sure. The Display of the...

Thanks, I will and will get back to you.

I'll look into that. Thanks again.

This might be totally normal, but the default parameters for the Over Voltage Protection and Recovery in the BMS suggest otherwise (57.60 and 54.00V). The 48V LiFePO4 Battery is made of 16 EVE LF280K A-Grade Cells (3.2V 280Ah). They are controlled by a Seplos BMS (3.0 200A with 2A Active...

Thanks for the charts BentleyJ. Interesting fact, that the voltage is higher when charging, but it makes total sense of course. And no, I haven't verified the voltages but I should have. I also have to admit that the 53.33 V were right after the inverter stopped charging, so it might have...

Hi all, Thanks for the advise. I tried monitoring today, but there was not enough sun to get above 95%. I'll try again tomorrow. I did find a log file from when I charged the battery via the Growatt Inverter from 240V grid power. The Over Voltage Alarm was triggered at 57.62 V and...

Makes sense now. Even to me. Thanks again.