Henwilsch

@BritishRacingGreen thanks for the explanation. It is good to know.

Call me a Idiot and I would agree. Found the problem, I was connecting the PV reverse polarity. I will not go into details how this happen, but it happened and I am totally embarrassed. Every thing calmed down after I connected it the right way round. @BritishRacingGreen yes nothing happen regarding solar charging when the battery was 52V and the PV at 53V. I didn't even get a PV voltage registering on the display. I then increased the PV voltage to 65V and SCC came alive and after a few seconds started to charge the battery. I am just totally amazed at how hardy the SCC is and that it took my abuse with a smile and protected itself! Thanks guys for all you help.

@Coulomb thank you for the explanation. I think that you maybe solved this. The battery and the solar input is just about the same voltage so it might be that the SCC does not power on and no control over the circuit is happening. I will try with higher PV input voltage and report back. A few questions: 1. Can the SCC work stand alone or must it be plugged in to the inverter? 2. What is the 4 wire cable that plugs into the control board used for? 3. What is the 2 wire cable that plugs into the inverter main board used for? 4. Does the SCC have its own PSU to power the CPU or does it rely on the inverter to power it?

@Coulomb I tried to test the SCC again but no joy. I use a 53v power supply(not current limited) but to do current limiting I use 24v 21W globes. I used 2 in series witch should limit current to 0,8A. I got a small battery(5Ahr 52v) connected to the battery input. When I turn on the solar power supply a relay click and then the globes light up. I left it for a while but it just stay like that. If I measure at the solar input terminals I get a reading of -11V. I added more globes to give current limiting to 2.38A and same result. I removed the SCC and did some multi-meter test but I could not find any component that is short or could cause the problem. The SCC looks good. I would just like to know if it works. Any ideas what I can try or if there is something wrong?

Thanks for your explanation. I will rethink my test setup and maybe tests with solar panels.

Thanks I will check that. @Coulomb any input? The battery is very small (5AHr) so it will not draw a lot of current.

Is there a special way to test the SCC. I tried connecting a 53v power supply to the solar input with a battery connected to Battery input. I have a 30A fuse inline with the solar input. When I turned on the solar input PSU it want to start and I can hear a relay click but then the 30A fuse blew. I then put some high wattage resistors(1,5 ohm 25W) inline thinking that it has to do power point tracking but the resistors got hot and the voltage at the inverter input measures 0v. With the inverter off the solar input measures high resistance. Does this mean SCC is faulty or am I testing wrong.

Hi I replaced all the Capacitors with Hitano Low ESR capacitors and that solved the problem. I must still just test all the functions but all looks good so far. Thanks for your help.

Thanks I will try that and let you know.

Thanks for your reply. I see your tread, but it is lengthy. Any pointers where to look or what is the main causes for this problem.

Hi Peterj, Where are you located? I have the same problem with my Axpert. It started when the Eskom power was restored after load shedding one Sunday. The LED,s flicker on and off and I can hear a relay clicking. I disconnected everything except the battery but still the same. I opened it this weekend and looked for any obvious damage, nothing the eye could see. I even removed the SCC board, but still the same. If someone could point me in the right direction I would appreciate it very much. I am a electronic technician and can do board level repairs.

Hi, You can mail Jeff at [email protected] and ask him to send it to you. If you get it be sure to share it here.

You use Batteryview to load the firmware to the Battery via the Console port. If you Scroll up to a post from PurePower July 9, their is a link to another thread where you can download it and the instructions document.

Please take note this is not for the US3000 but for the new US3000C battery.

Hi this from Pylontech: "I will send you the latest firmware through WeTransfer. But v2.2 has not much change, just some improvements on internal operation logic."