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Thanks @Coulomb. After days of troubleshooting I have managed to figure out that it is a fault on the DC side of the Inverter. The manufacturer and the seller have agreed to collect it and take it for evaluation and repair/replacement.

@Raj35, the inverter doesn’t recognise the batteries at all - gives me a “No Battery Connected” fault code. Batteries are fully charged - showing 53.8v when measured at terminals with multimeter - as per Hubble data sheet. I’ll go into settings and give it a try though and let you know if it helped.

Thank you @BritishRacingGreen for the reply. I obviously didn't make it clear that when the fuse breaker is closed before the battery its turned on, the battery will send an alarm light immediately and even after a reset, it won't change. If I disconnect the fuse breaker and turn on the battery and reset it, it then shows as fully charged. This is all done with the inverter off. What would cause this, and how can I troubleshoot it? Any help is appreciated!

I’m hoping someone can help me out with this problem….. I have a Mecer Sol-I-Ax-8m inverter connected to 2xHubble AM-2 batteries connected as a backup system - no solar yet. The whole system was working perfectly fine until a kettle was plugged into the wrong plug and turned on. The batteries’ alarm light turned on and the inverter circuits turned off. After bypassing the inverter, the batteries will only reset when the battery disconnect fuses are disconnected. They show as fully charged and working. As soon as I close the battery disconnect to connect to the inverter, the batteries’ alarm light goes back on and I can’t reset them. This is done with the inverter off. Any help or ideas as to how I can sort this out will be appreciated!

I’m hoping someone can help me out with this problem….. I have a Mecer Sol-I-Ax-8m inverter connected to 2xHubble AM-2 batteries connected as a backup system - no solar yet. The whole system was working perfectly fine until a kettle was plugged into the wrong plug and turned on. The batteries’ alarm light turned on and the inverter circuits turned off. After bypassing the inverter, the batteries will only reset when the battery disconnect fuses are disconnected. They show as fully charged and working. As soon as I close the battery disconnect to connect to the inverter, the batteries’ alarm light goes back on and I can’t reset them. This is done with the inverter off. Any help or ideas as to how I can sort this out will be appreciated!

Thank you for the response - much appreciated! I will follow up with both of these.

Hi, After much deliberation we have decided to go off grid!! I have a backup system installed but need to add the solar PV's. Does anyone have a any good recommendations for a solar installer who will do a proper job in the Pretoria East area of Gauteng? Any advice would be appreciated. Thanks!

Hi @HubbleLithium, I am about to install 2 x Hubble AM-2 5.5kwh batteries to my system which runs 2 x Axpert 5kva inverters in parallel. When I install the CloudLink, how do I connect it to both batteries and inverters? Or do I just connec to the master inverter and master battery?

How do I go about connecting a 48V HA02 Battery Balancer to my Solar Gel Batteries? I did find a thread about it earlier, but I can't decipher the pretty pictures - I need a step by step if anyone is willing to do that for me. I have 2 banks of 4 x 12v 200AH in series, then connected in parallel. Do I just connect the balancer to the one string (red to positive and black to negative) and it will balance all 8 batteries, or do I need a second Balancer for the second string? I'm quite useless when it comes to this stuff...... Thanks in advance for the help!

@Beat& @Irocmaster - Thanks for your input. Anything that can help me figure this out is appreciated!

Very much a noob to this and I’m quite clueless when it comes to working with these inverter but I’m slowly learning. Is it possible to install a time delay relay on an inverter circuit where the inverter is being used as a UPS - no solar? The circuits draw too much power when the inverter kicks in at load shedding or a power failure so I want to set them to delay turning on until the inverter has stabilised after switch over. Is this possible? I'm running 2 x Axpert 5kVa/4kw inverters with 48V 400ah total battery bank (8 x 12V 200Ah Gel batteries - 2 banks of 4 in series then both banks connected in parallel), Any feedback is much appreciated.

Thanks so much for your insight @Arandoza and @Coulomb! After more testing today, what you have said now actually makes sense to me. I generally have about 300W running continually and that then climbs when we use a kettle or a toaster or the microwave. We have 2 fridges and a water cooler that are on the inverter and I think when power changes over to the inverter, those draw too much for the 48v 400ah gel batteries to handle, hence the super fast drop off (at least that is how I understand it after your explanations?). Today I shut off the fridge circuits and turned the mains off. The inverter dropped from 54.4V to 52.2V and stabilised. Hovered between 52.2V and 52.3V for over an hour. I then turned the fridge circuits back on and the system dropped to 50.0V where it stabilised at 50.2V and sat for another hour before I turned he mains back on. With the fridges running, my max load is only about 800-900W (add laptops and 3 Smart TVs and a few LED lamps). I see my only solution being 1 of 2 things: - I remove the fridge circuits off the inverters and back to mains; - I place a time delay relay on the fridge circuits so they each come on 2-3 mins after everything has switched over and stabilised on the inverter. I’m not even sure if this is possible? Thanks again for the help. Much appreciated!

Anyone who can shed some light on this problem I’m having now - your input would be greatly appreciated! As stated before, I’m generally quite clueless when it comes to this so any help is hugely appreciated!! My system is set up purely as a backup/oversized UPS system - no solar. - 2 x Axpert 5kVa 4kw in parallel - 8 x 12v 200ah solar gel batteries (series/parallel connection to get 48V 400ah total - 2 series strings of 4 batteries connected in parallel) We had a massive power failure last week which lasted 2 days. This was the first time we had lost power since I put the system in, so I was interested to see how it would fare. Lasted all of 2 minutes before Error 04 started flashing on the screen and the alarm kept beeping! My settings on each inverter are as follows: 01 - Uti (Discharge Priority) 02 - 30A (Total Charge Current) 05 - USE (Battery Type) 12 - 49.0V (Back to Utility) 13 - 54V (Back to Battery) 16 - CUt 26 - 57.4V (Charge Voltage) 27 - 54.4V (Floating Voltage) 29 - 48V (Battery Cut-off) I was so disappointed. I chose to ignore it and went to the forums to see if there was a similar story that I could perhaps pick up some pointers from. I use the system purely as a backup/oversized UPS - no solar. The whole lot is not even 2 months old so I cannot understand how it can last 2 mins before it starts to send an Error 04…… From what I have read in the forums, maybe my batteries aren’t fully charging? Or they aren’t in sync (or whatever the term is)? Or they are damaged? I decided to test the system again today to see what it was doing. When I threw the mains off, it switched over normally and continued as it should. The voltage dropped from 54.4V to 52.2 in the first 2 seconds (the battery display dropped to 2 bars out of 4). Then it slowly and steadily dropped 0.1V every few seconds. At just over 2 mins Error 04 came up and the alarm sounded. The voltage was 49.8V (and battery display was on 1 bar out of 4 and flashing). All these readings taken off the inverter display. Switched mains back on and it switched over without any fuss, alarm stopped, Error 04 stopped displaying and batteries started charging back to 54.4V. Stopped charging within 5 mins of change over. I really have no idea. Any help would be appreciated…..

Thanks so much for the feedback @Coulomband @KLEVA. Very helpful indeed! I will adjust my setup accordingly and hopefully get the best out of my batteries and the setup as a whole!!

Hi Coulomb, I’m really quite clueless when it comes to this stuff. I did find an info sheet on the side of the battery that was hidden by the installer (who clearly knew how to install but didn’t know how to set up correctly). I’ve included it below. Any info you can help with would be greatly appreciated! I’ve changed setting 02 to 10A on each inverter which has stopped the fans running continuously. Is this ok to charge up between Load Shedding or should I rather keep it at 20A? I take it Gel and AGM can be seen as the same type of battery? I’ll make the change on 27 to 54.4V , but please could you see what you think of the info from the sticker I posted below and let me know if it’s correct? Thanks again for the help!

Hi, I'm new to the forum, but been looking through it for a while. I have recently had 2 x Axpert 5kVa Hybrid Solar Inverters installed in parallel with 8 x 12v 200ah Gel batteries in a parallel series connection to total 48v 400ah. The system is only for backup and load shedding so no PV's installed as yet (long term project). 1st Question: I would like to ask if anyone can give me the correct settings for the batteries on the system. I scrounged around different forums and managed to find something that could work with the following settings: 01 - Uti (Discharge Priority) 02 - 50A (Total Charge Current) 05 USE (Battery Type) 12 - 49.0V (Back to Utility) 13 - 54V (Back to Battery) 16 - CUt 26 - 56.4V (Charge Voltage) 27 - 55.2V (Floating Voltage) 29 - 48V (Battery Cut-off) Not sure if this will work, but anyone with a similair setup that could give me some useful info to get my setup correct would be most appreciated. 2nd Question: The fans run continuously - with big loads or almost no loads. Is this normal? Many thanks!