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Thank you for the great forum, Safe Driving over the weekend. Sincerely Jason

Darknight

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  1. Hi Guys, Small update. So I managed to get the company I initially got the batteries from to allow me to get 2 x brand new Narada 200AH batteries by paying a small topup. Unlike the batteries I had previously, these are a different model that come sealed in boxes and are apparently more compatible to solar systems. I happen to know the company that sells them these batteries and I'm able to get 2 more brand new ones to increase my battery bank to 4 batteries. What I'm hoping the guys here could help me with is what values I would have to place on the following settings if I did decide to increase my battery bank to 4 batteries. Obviously because I'm running a 24v system, the batteries would have to be connected in such a way to keep the voltage at 24v while increasing the amperage to 400ah. MAX CHARGING CURRENT (UTILITY CHARGING CURRENT + SOLAR CHARGING CURRENT). At the moment this is sitting at 30A. I'm assuming this would increase if my battery bank increased to 4. Any idea what the setting should change to? MAX UTILITY CHARGING CURRENT. Currently this is set to 20A. I'm assuming this would also increase if the battery bank increased. I'm assuming this would increase to 40A (10% of battery capacity). I'm also assuming that my voltage settings would remain the same since it would still be a 24v system. Thanks
  2. Thanks I'll have to see if there is a manager or owner available. I honestly just don't want to have to deal with this same dude again.
  3. So just an update on the situation and an insight into how some of these solar equipment companies over here are operating. I contacted the company that I bought the batteries from to inform them that there seems to be a problem with the batteries. They told me that they would send a technician to my house to check the batteries. I had requested for them to send the technician today in the morning so that I could be available for the technician. The tech arrived late but was able to check the battery. The tech told me that one of the batteries had a problem and that his company has been experiencing a lot of similar problems with these batteries as they are intended for cell towers. The tech told me that they would replace the batteries but they did not have stock of these exact models. He told me to ask their sales team if they could provide me the solar compatible batteries they do have in stock if I was willing to pay a topup on what I had already paid for my current batteries. The tech asked me not to mention him when I spoke to the sales team. I spent the rest of the afternoon trying to contact the company only for them to ignore my calls. Eventually, at around 3.30pm, I got through. I informed the sales person that their tech found that there was a problem with the battery. I asked the sales person if I could top-up money to get the battery that they have in stock, at which point the sales person became irritated. I asked the sales person if he could give me some form of assurance that if I replaced the batteries with the same model, I shouldn't experience the same problem. The sales person became extremely irritated and began to shout at me over the phone. I calmly asked the sales person why he was shouting at me. This made him angrier. I then told him that If he wanted to shout and yell at me, that he should refund my money and take the batteries back as I did not wish to deal with a company that shouts at their customers. I then hung up the phone. I then whatsapped the sales person to inform him that his customer service was poor and that I did not want to deal with his company. I requested for my money to be refunded. He proceeded to tell me that I was bullying him (even though he was shouting at me on the phone) and that he would not refund my money. I then told him that the only way I would accept the same model of batteries was if they were delivered still in their boxes and with some form of proof that they were brand new (As a side note, when I bought my batteries initially, they were not in boxes. They were simply cling-wrapped). I told him that If he could not do that, I would prefer to be refunded. The sales person then went on to label me a racist even though I never once insulted him, or his race, or raise my voice. I actually referred to him throughout the conversation as "my friend". I decided to block his number. So that's pretty much how my search to fix my batteries has gone. I am a service provider by profession and some of my clients sell batteries. Namely the Trojan and Allgrand batteries. However, they are quite expensive and I don't really have the cash at the moment to sink into a new set of batteries. I may be able to get the Allgrand batteries on terms, however I'm not sure how good these batteries are. I honestly don't mind replacing my current batteries with a brand new set of the same model at no cost but I'm not sure how to continue communicating with this company that I bought my batteries from initially after dealing with their sales person.
  4. I'm really interested in how this would work? If your power is cut during the day, would you be using your generator?
  5. I've changed the setting 02 this evening to 30A. I'll monitor it during the day tomorrow. I think my batteries are definately shot. Reason being that today I allowed utility to charge my battery fully. The inverter showed 100% SOC on the battery icon. This evening I changed my charging priority to OSO and the SOC% immediately dropped to 50% with the battery voltage sitting at 25.8v. Within about 90 minutes the SOC dropped from 50% to 25% with the voltage sitting at 24.6v. After that, I decided to change the charger priority back to CSO which started charging the battery with utility. The voltage immediately shot up to 28v.
  6. Thanks for the feedback @Coulomb I'm a little confused on how this max charging current setting works. According to the inverter datasheet the max solar charging current is 50A. In the settings there's setting 02 - max charging current (UTILITY CHARGING CURRENT + SOLAR CHARGING CURRENT) and setting 11 - MAX UTILITY CHARGING CURRENT. If I lower setting 02 - max charging current to 30A, does that mean that I'm using less solar power to charge the battery since 20A of the 30A is from utility? Or does that mean that during the day, when my batteries are being charged through solar, 30A of solar power will charge the battery and in the evening when there is no solar, 30A of utility will charge the battery. In this scenario, that would mean that in the event that both utility and solar are charging the battery together, the max amount of power charging the battery will be 30A? At the moment, my setting 11 - utility charging current is set at 10% of ah capacity which is 20. My setting 02 - max charging current is set at 50A. Should I change both setting 02 and 11 to 30A or just one of them? Would this not risk overcharging the battery? According to the battery sticker, the float is 2.25vpc which is 13.5v per battery module. If I set the float to 28v, that would mean 2.33vpc. Is this difference safe enough to charge the battery without damaging it?
  7. Well that sounds depressing. I only got the batteries about a year ago. Nope, not that I could find in the inverter manual. Does 24v sound good for this? For a 24v battery bank, how do you know what voltage is 100%, 50%, 0% etc? I can't wrap my head around this. I saw in another person's post that you had advised him to lower his max charging current from 40A to 20A. Do you think I should do the same?
  8. Hi Guys, I have a Growatt 3kW 24v inverter. I currently have 4 x 330w panels (however, I've bought 2 more to add to it.). I have 2 x 200ah Narada 12v batteries. From what I've read and been told from other members here (thanks @Coulomb and @Jaco de Jongh), the firmware on the Growatt is similar if not identical to that of an Axpert. Anyway, after some help from you guys and some research during the early stages of my solar installation, I finally understood how my inverter was operating and I've been able to get it to work more or less the way I was hoping it would. This leads me to my current predicament, with which I'm hoping you guys would be able to help me out with. I live in Zimbabwe, and the utility provider (ZESA) have increased their tariffs dramatically and so I'm trying to reduce my utility bill as much as possible which is why I'd like my batteries to charge only on Solar. My current settings are; 01. OUTPUT SOURCE PRIORITY - SOL 02. MAX CHARGING CURRENT (UTILITY CHARGING CURRENT + SOLAR CHARGING CURRENT) - 50A 11. MAX UTILITY CHARGING CURRENT - 20A 12. SETTING VOLTAGE POINT BACK TO UTILITY - 23v 13. SETTING VOLTAGE POINT BACK TO BATTERY - 27v 14. CHARGER SOURCE PRIORITY - OSO 19. BULK CHARGING VOLTAGE - 28.2v 20. FLOATING CHARGING VOLTAGE - 27v 21. LOW DC CUT-OFF VOLTAGE - 21v Through my inverter I'm running 2 freezers, lights, modem, and TV. During the day, there's enough sunlight to power my load and keep my batteries charged. My load on the inverter is less than 50%. At around 5pm, my inverter starts powering my loads with utility while the little sun-light available charges my battery. Once the evening has set, my battery is no longer being charged or used. What I've noticed however, is that my battery SOC dips from 100% to 25% in a matter of 30mins as the evening sets in around 6pm. From 6pm to 7am, my battery SOC dips from 25% to 10%. My battery voltage however, never dips below 23v during this time and my inverter never signals any alarms. I thought that if setting 14 - OSO was active, the battery would be charged to 100% by the evening and would only dip to maybe 50% by the morning wherein the solar would kick back in to charge it back up to 100% but that is not what is happening. This obviously leaves me with a problem if utility power is cut in the evening. Maybe some of my settings are wrong? Any help is greatly appreciated.
  9. So, I've been speaking to the Growatt technician in China and he is basically sticking to his guns that the inverter is working normally. He sent the following explanation; it's a battery protection mechanism, when battery is charged,battery SOC will go up to 100% finally,battery will send an order to PV charger to shut down,stop charging,avoid charging battery too much and damage battery, after a while using,if battery SOC drop below 95%,PV charger will start working automatically again to supply power to the load and charge battery until it's charged 100% fully again, in this way,if there is main grid outage,battery will always keep almost full, suggest use SBU mode in program 01 setting,it will use more power from battery, I might be wrong but doesn't constantly charging and discharging a battery reduce the lifespan of the battery? Or am I understanding this incorrectly?
  10. Sure. Below are the charts from 2 days this month when the weather was sunny with slight cloud cover. I also have a video of what is happening on the inverter screen if you want to check that out too.
  11. I've got a Growatt 3Kv inverter as well. To be honest, my own experience with it hasn't been fantastic though I've been having a different issue to yourself. I've been in contact with Growatt directly as well as the people I bought the inverter from but neither of them has been able to give me a solid answer about the issues I'm facing. The Growatt technician I have been in contact with sent me a firmware update for my issue but loading it didn't solve my problem so I'm not sure it would solve yours. You could possibly try factory resetting the inverter. The Growatt technician sent me a video on how to factory reset it so if you want the video, just let me know. You could try using the following settings on the inverter. 01 - SBU 14 - CSO
  12. Correct Speaking of firmware, the Growatt technician I was speaking to sent me an "updated" firmware along with the software and steps to push the firmware update to the inverter. I did the update without any issues. The technician said that I needed to factory reset the inverter after the update, which I also did. When I contacted him to tell him that the inverter behavior hadn't changed, he told me it was because I didn't factory reset. I told him that I did and I haven't heard back from him since then. I initially went to the company I had bought the inverter from and told them what was happening. I even showed them a video of the inverter screen. They told me that it was an issue they had experienced before and that it was due to an issue with the MPPT. They then sent their own technician to check the inverter but he didn't even check it. He told me that this inverter has a max solar input wattage of 1000w and that because I had more than 1000w, that's why I was having this problem. I contacted the Growatt people to find out from them what the correct max solar input wattage was for my inverter. They told me 1500w. The Growatt tech also said that as long as the voc of the solar panel array is less than 102v, the inverter will operate fine regardless of the size of the solar array.
  13. So, Just an update on my solar installation. In short, it's messed up. I've tried everything I could think of but it doesn't look like it's working properly. I've resigned myself to just living with it since I've already sunk money into it and the only way I could recoup my money is to sell what I have. I've put 4 panels (3 x 330w, 1 x 335w). The panels are wired in a series-parallel configuration. My inverter is now doing the same thing it was doing when I had just 3 panels wired in parallel. I've got the monitoring software for the inverter and from the depressing information I can see, the only conclusion is that the solar inverter I have, does not like solar energy. I've spoken with the manufacturers directly but they keep telling me everything is okay and the inverter is working "as it should". The reason I don't believe them is because I have 1320w (I know I'll never generate the full 1320w of power from the panels) of solar panels to power a load of 800w at max and yet, on a warm day, with minimal cloud cover, my batteries are never charged fully since they are frequently being used to power my load when my inverter decides not to draw any solar energy from my panels. This happens frequently during the day. On my monitoring graph's for these days, there are frequently periods of between 10 - 45 mins where my inverter is not drawing on any solar energy. Anyway, thanks for all the help you guys provided. I just made the wrong choices when it came to purchasing my inverter.
  14. I understand this 150%. I'm currently looking at getting a custom-fabricated mounting rack for my panels because the one my installer provided is a piece of aesthetic crap. Awesome!
  15. So just another quick update. I found a spec sheet for my inverter which specifies that the max PV power array is 1500W. This means if I add one more 330W panel to bring my total number of panels to 4, I should fall within the acceptable range. However, there is a new wrinkle which I need a bit of help on. The company I bought my 3 x 330w panels from had run out of stock of the 330w panels. They do however have the 335w panel from the same manufacturer and same panel model. The 3 panels I already have are the Canadian Solar 330W HiKu panels. The 335W panel that my supplier has in stock is Canadian Solar 335W HiKu panels. Below is a picture of the spec sheet for the panels. So my plan is to have 2 pairs of series wired panels in which both pairs will be wired together in parallel. Would I still be able to do that if the one pair of series wired panels consists of one 330W panel and one 335W panel? I've read that in the case of using mixed panels, the system will use the lowest rated panels output which I'm fine with since the difference in output between the two panels is quite unsubstantial.
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