Brad

Hi Coulomb, As per your previous post regarding Lead Acid and AGM. The inverter was indeed set to AGM and thus the low charging voltages. What should I set the Bulk Charging Voltage to and also what should I set the Floating Charging Voltage to? The Batteries are Royal 1150K batteries.

Hi Coulomb, Thanks for the update. They are not exactly the same batteries but are lead acid. I suspect I have the battery type setting as AGM. I will check which setting it is on and update if required. I hope this won't damage the batteries. I will revert back. I just have to say that it is very comforting knowing that there are people out there so willing to help. A huge thanks to everyone.

Thanks for this I will investigate but would much rather get my current installation working as I have enough expensive paper weights.

Hi Thanks for the speedy response. The system is installed on a mountain so I won't be able to check for the next week as I am on training at the moment. I will definitely go have a look as soon as I can. The absorb voltage as far as I remember is 56.4V. The strange thing is that when I first installed the system (over 3 years ago) it worked perfectly and would handle a bad weather stage of over 4 days without cutting out. We then replaced all 12 batteries and now 6 months later it is giving us these problems. I'm sure almost sure it is not the bug. I have changed a few settings since and I'm not sure if they have anything to do with it. I installed the Icc software on a raspberry pi and the graph is attached. Please excuse the time though it stopped charging at 16:30 (this was before I installed the solar tracker). You can clearly see that during the time the panels were delivering sufficient power, the inverter was under the impression that the batteries were fully charged but then as soon as we lose solar power, it drops immediately. If the inverter has the bug, which inverter would you suggest I buy to replace?

Hi, Thanks for the prompt reply. Sorry I made a mistake it's a 3kVA model SOL-I-AX-3Mplus48 The Mecer branded one

Hi To give a bit of background, I have 6x260W panels connected 3 panels in series and the 2 banks of 3 in parallel. They are mounted on a solar tracker which gives around 1.2kW from 9AM to 5PM. I have 12 x 100Ah batteries 4 in series to give 48VDC and the 3 banks in parallel for a total of 300Ah @ 48V. We constantly draw between 150W and 220W. The inverter cuts out at around midnight due to battery voltage too low. I think its set to 46V. My main concern is that when I look at the inverter the display says the batteries are fully charged at around 10AM and the battery voltage is 56 odd volts. With my limited knowledge and advise from my supplier, I have checked all settings and the supplier confirms the settings are OK. We have manually tested each battery and the batteries test 100% OK. They are only 6 months old. Can somebody please assist with which settings I should use. Thanks in advance