Mampoer

I am very sure its com 1 as that is where watch power finds it and I set it to com 1 in the device manager, regardless of where windows enumerates it. There is also an indication that the inverter wants to start the update process as you can hear a relay in the inverter switch and after that its unresponsive to button press and watch power. Only a power down and up brings it back to life. Clearly there is coms but Im at a loss as to why it wont upgrade. Its been 2 weeks now and the best performing batteries are now just falling out as before, probably from undercharging. The rest I have charged every day and they seem fine. Im thinking about connecting them in parallel as soon as I get some lugs and wire to jump them in pairs. I am desperate as this solar system is now quit useless, running on utility all time regardless of ample sunlight. Should I take the inverter to the supplier and see if they can upgrade it?

Trying to update: https://photos.app.goo.gl/rtPzM8fqD1H6RNTj9 Restarting: https://photos.app.goo.gl/xQCANHQ544Awg2TCA

Correction, It turns out to be an HXD, not sure if it make a difference.

Thank you for the suggestions, I have been playing musical batteries over the weekend. I use a Multimeter and as the load increases I check which battery drops out. Ended up with 3 x 170Ah and 1 x 200Ah holding charge very well, remaining at about 51V as the clouds come and go and taking about 2A during the night on utility. I found 1 x 170 and 1 x 200 that fell out to about 8V under load of about 27 A. As I disconnect each out of the string they float back up to about 11 - 12 V. I have up to now charged them individually and the Charge current drops to about 2A at 13.2. Then leave them for a while and charge the rest. I must also add that while I was using the 170s only for the last 2 years, I kept an eye on the 200s. 2x sat at 12.8 and 2 x at 11.5 never really changing, I charged all individually and all stayed at 12.8 but I never left them on charge very long so they quickly dropped out when I started reusing them. After charging individually, all seems to have settled at about 2A at 13.2, jumping to 4A at 13.8 and then settling back to 2A at same. May just be wishful thinking but they seem ok and Im going to try them again, 1 by 1 and see if they hold or not. As for the Prolific, I used the tool and tried it on 2x usb serials, both identifying as Prolific but it looks different form the screenshots I have seen here, I has a 3 digit postfix, I think it was hxa, not sure if it will make a difference. As far as if the inverter is a PWM model, I cant say, but its time to open up and blow out the dust so Ill take a pic of the PCB if that will help, is there any identifying parts or any PCB markings that will indicate what model it is?

Hi All I have tried to go through posts on the 2 forums re firmware updates, I appologise if I am repeating. My Axpert just wont update firmware and destroys batteries. I use the Prolific USB to serial and I tried a FTDI as well. It just starts, you hear a relay switch off in the inverter and then nothing. It then just posts some text saying com port opened. The inverter is stuck on last screen and unresponsive. You have to disconnect battery power to get back to life. I thought maybe cpu2 may have some effect on the upgrade procedure and tried to update it as well but similarly it needs a battery disconnect to come back to life. I leave only solar and battery power on when attempting upgrade. Im quite desperate as I have now seemingly lost a 2nd set of AGM and its getting expensive. I bought the kit (panels, inverter, batteries) from Electrilabs in Midrand. the inverter is a 4KW/5KVA. My first set of batteries was 200AH PVC GEL they lasted about 2 years, 2nd set is 170AH telecoms, a bit tougher but as of this week doing the same. I have Isolated on both sets 1 batterie being the culprit. in both case 1 battery dropes to 8V. I used a car battery charger with a bulk charge switch to recover both and they hold charge while doing nothing so prob wont work in the system. To keep running I now broke the rules and put 1 of the 170 ah in with 3 200Ah but its most likely going to cause equalisation issues. I hope 1 of the 2 sets will still be usable, I even considered hooking them up in parallel but it may strain the inverters charger. Any help to get the damn thing upgraded will be appreciated. Any suggestions to revive an AGM will also be welcome.