I've had my 48 V opsolar battery and 6.5kw inverter for less than a year.
I also have a 2KW off grid solar panel set up with this system.
Until today I was producing circa 1500 watts an hour when the sun was up, which would charge my battery and other loads.
Today when I went to check on my system at around noon in full sun, I noticed my inverter only producing about 100 Watts on each of the two MPPT strings (200 watts total) to charge my battery, and my battery would not get above a 40% charge level.
When I put another load on, the inverter then quickly went up in production to about 1300 watts, but my battery still did not charge beyond 40% with the inverter.
Anyone have any clues for this, and how to rectify the situation?
Another thing I noticed is that despite my turning the battery off and the inverter off, the inverter stayed on until the sun disappeared. Is my inverter supposed to stay on with the sun up, and the power button turned off? When the solar power to the inverter finally stopped and the inverter turned off, the inverter started a nonstop clicking noise. For fear of damaging the inverter, I turned the battery and inverter back on to stop the clicking noise.
You might want to tell us more about how your system is configured. Typy of batteries? Are the batteries smart batteries that are communicating back to the inverter, or are they just connected to the the inverter via the main power (48V)? I am using the OP batteries and before I have the correct communications to the batteries I used "User Mode" in the inverter to regulate the charge on my batteries.
The settings were:
Program Setting 05 05 or USE 26 57.6V 27 54.1V
These voltage settings were provided by the battery specification sheet. Yours might be different.
A better way is to have the batteries communicate directly to the inverter. There is setup info on how to do this on another blog. It requires a special cable and to daisychain the battery controllers together. Hope this helps.
If this happen again, please take a photo, and apart from checking the battery SOC, also check the battery voltage. Thanks.