optics

I can change output source priority on SA for my Growatt SPF5000ES.

Thanks for this information Sparky.

I don't think it will work. https://solar-assistant.io/help/getting-started/prepare-device

Just some feedback in this regard. My installer fixed the earth-neutral bond on the inverter output and it never trips again in more than a month. Thanks for everyone's input.

I did this a few minutes ago. 1 Reading on DB between earth and neutral is 0.015V 2 Inverter input side Reading on SOL setting is 0.247V This setting is my current setting. Reading on SUB setting is 0.912V Reading on SBU setting is .529V Inverter output side Reading on SOL setting is 0.001V This setting is my current setting. Reading on SUB setting is 0.645V Reading on SBU setting is .003V

Just for information. I just got home and I switched off the earth leakage. The power consumption then shows 10W. As soon as the electrician gets here within the near future we will check the voltage between earth and neutral. I will give feedback. Thanks for all the help so far.

Could it be related to the update frequency (I think it is 5 minutes) of the software server?

Will that be on the main DB or on the inverter output side?

Thanks very much for this. I will get it checked out.

Thanks for this information. Could you please direct me to the source of this information. I need to bring it under the attention of my installer.

Thanks for all the replies from everybody. I need to learn a lot.

I just got hold of my installer and he also suggest that I attend to the earth-neutral bond. He will come fix it.

I have no idea.

Thanks for the reply. According to the installer the inverter supply is before the earth leakage as it will keeps on tripping the earth leakage if connected after the earth leakage.

I have the following installation. Growatt SPF5000ES, 1 X Pylontech US3000C battery and 8 X JA 540 solar panels. I am planning to add a PylonTech UP5000 soon. Stove and geyser is not connected to the system. My problem is that the earth leakage sometimes (not always) trips in the morning at 05:15. I have no equipment that is scheduled to start at that time of the morning. Could it be Solar panel related as it is the time that the panels start receiving sunlight? It happened exactly when the changeover from Grid to Solar happened according to the inverter monitor software. Can anyone suggest where I can start looking for the problem. Any help would be appreciated.

I know it is a bit late. https://lithiumbatteriessa.co.za/collections/inverters/products/sunforce-bp-5kw-m5000h-48bp-pure-sine-wave-hybrid-inverter-with-wifi-dongle

@Quwatush Shams Thanks very much for this useful information. Now I understand the automation portion. Thanks again for your time. Regards

Hi Quwatush Shams Thanks for the advised settings. This is precisely what I need as this is not my field. Program 29 setting of 46.5/46 is that the voltage where the inverter will switch off or wants to go back to utility? What % DOD will that gives me? From what I understand from your post is that Lithium batteries needs to be used daily. This system will only be used for backup in times of load shedding. Other times, load will be supplied from utility via inverter. In this case the batteries will not be used at all. Does he have to switch off the inverter everyday and let it drain the battery by about 20%. Do I understand this correct? Do you suggest that we leave the fridge and freezer part of the system? But then the load might go higher than the 1Kw. Can I assume that the load might then not hold for two and a half hours. He does plan to get another module in the future. I will certainly look into the ICC option. Currently he is using Watchpower to check the system but I am not sure what ICC can or cant do? Thanks for everyone's patience with me. Regards

Hi Ian Do you mean overcharging by the inverter or overload by the load drawn from the battery. Thanks for the rest of your reply.

@Ian our calculation for the appliances excluding the fridge and the freezer, comes to 916W. The fridge and freezer will be excluded from the backup system in future. From what I understand is that this 1Kw can be easily manage by the 5Kv inverter as it doesn't use the full capacity of 5Kw from the inverter. None of the appliances have a huge startup requirement. From what I can make out from your calculation is that if the load shedding last for two hours we will need a 2Kw supply. If it last for 2.5 hours then we need 2.5Kw supply. With 3.5Kw lithium battery and a useful capacity (80%) of 2.8Kw it seems that it might make it for two and a half hours. Please correct me if I do not understand this. You also brings 110A into the argument that only complicate things for me. Will the battery be compatible with the 5Kv inverter. keeping in mind it doesn't use the full capacity of the inverter. It doesn't matter if it will not last for the two hours. If yes, are there any specific settings in the inverter required for the setup. Thanks again for your time.

@Ian Thanks very much for the reply. I assume it makes sense to get the load first. I will get them to tally the amount of W usage at a time. This is all Greek to me. I will come back with more information. Yes it is a 48V system.

I am new on the forum and new in this field. Please have mercy on a retired person. I need help with a system that my son uses at home. It is a Mecer 5KVA inverter that he uses as a backup for load shedding. It is connected to the utility supply and takes over automatically. When in use it is supplied by four 200A/h gel batteries. No solar panels involved. The system is in use for two years now and the batteries has packed up. I suspect that the batteries discharged to low. When the system is in use, it supplies a fridge, freezer, two fans, three 40" TV's, modem, 2x decoders and PS4 with monitor for about 4.5 hours when the batteries were still fine. During load shedding all these appliances runs full time. Load shedding does not last 4.5 hours anymore but only 2.5 hours in general. He wants to replace this batteries now with a 3.5KW/u Lithium ion battery. First I want to know if this battery will be compatible with the inverter. Secondly, how does this battery compares with the 200A/h gel battery. (How many hours will it be able to supply and how many years will the battery last in comparison in general.) Thirdly are there any settings that we should take note off for this inverter that should be specific for this battery. He is currently looking at a Pylontech battery. I've read some stuff about this on the forum but to me as an old mechanical noob it doesn't make sense at all and I would appreciate any understandable advice from our learned friends on the forum. Thanks very much for your time in advance.