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Thank you so much for your reply. I’m afraid I have no idea about the cell voltages, or how the SOC is monitored. I just use the data cable with which the battery bms is connected to the inverter. I have attached a picture of the loads just before the SOC dropped. Also attached is the manual...

Hello, About 4 months ago, I exchanged by 8 lead acid batteries for one LiFePO4 100Ah battery, made by Unicoba, which is a renowned company with decades of experience in manufacturing batteries here in Brazil. At about 10:30 pm every night, I switch the inverter, a Growatt SPF3500ES, to battery...

I have been using the Growatt hybrid inverter for more than 2 years now with lead acid batteries, and have never had a problems. Recently I bought a Narada 48NPFC100 battery (details in attachement) which are used a lot in Asia, South Africa and Australia. I live in Brazil where it is difficult...

Thanks again fo all your replies. To me the 16 kW a day my 10 panels produce in the summer seems perfectly normal. Like mentioned above, the conditions have to be perfect to achieve 330W per panel per hour, and this is theorectically only possible 5 to 6 hours a day, often more like 3 or 4...

I don´t think I can complain. My ten 330W panels generate about 15 or 16 kW on a good summer´s day, and around 12kW during the winter.

Thank you again for your input. All 10 panels are mounted at a 23°, as is the lone panel. The 10 panels are facing north, whereas the other panel is facing a bit more north-west. Do you feel this really could be an issue?

Thank you! This too is very useful information. I think I will give it a try.

Thank you for your input. Yes, the lone panel is at a slightly different angle, but receives sun from the same time as the other panels and is never shaded. Our house is exactly on the tropic of Capricorn, so especially in the summer, the sun is straight above us. Could I really loose more than...

Thank you for replying so quickly. I don´t think I´m too worried about those small losses if I can add about 10% to my array with a panel that is otherwise being useless. I will connect the panel tomorrow then, and see if my production improves a little. The temperature shouldn´t be a problem as...

I have ten 330W panels in series about 100ft from my inverter on a 48V system. There’s another 330W panel I used to use for another smaller 24V system, which now is no longer in use. This panel is about 20ft from my inverter. My inverter supports up to 500V VDC, so I was thinking adding the...

Thanks for your input and suggestion. I‘ll order some of those. I don’t think I’ll get much higher than 20amp, so those should be perfect!

Thanks!

Thank you very much. I think I won’t be having too many problems connecting those two arrays then. If I use a MC4 fuse in the strings, is that only on the positive wire, or the negative also?

Thank you for your reply. I will be joining two strings of about 300Vcc and 9.5A each, so I suppose that should be fine. Should I use a 20A fuse or maybe just a little higher? Thanks again.

Hello, I have Growatt SPF 3500 ES hybrid inverter and now have nine 330W solar panels connected in series as the inverter can handle up to 430 Vcc. To add more panels I would have to build two arrays of 6 or 7 panels, and connect the two in parallel. I would really like to know if it’s OK to...

Hello, I hope this isn’t a silly question, but I don’t really understand what my Growatt Shine app is showing me. I have attached two photos which show how much much energy my panels have produced, how much I imported from the grid, how much battery power I used (storage power) and how much...

Hello, I have this all in one Growatt hybrid inverter but am having some problems with the AC output voltage. The power I receive from the grid is only about 205V but I have set the inverter 220V and 60Hz as is normal where I live. When I set the inverter to solar only, SOL, the output...

Hi again Michael, Thanks so much for your suggestions. I have tried the 8 panel suggestion on Monday, but it didn’t make much difference. BTW, I live in the sub tropics, so about 8 degrees Celsius (about 46 F) is about as low as it gets, just one or two weeks a year, so I think I’m safe for my...

Hi again, I finally managed to do all you suggested in your previous messages, and exchanged the battery wires dor the size you suggested. I’m afraid that so far it hasn’t had the desired effect yet. A few things I have noticed though, which I don’t know maybe could important are these: - the...

Thanks again. The voltage drop I mentioned is only what it appears to be for me for a few milliseconds, I didn’t actually measure anything, only kept my eyes on the inverter’s display which does’t show anything abnormal to me. All the wires, connections and batteries are new, so I can’t really...

Hello Michael, thank you so much for your reply. I have checked all the connections, and can’t find any screws loose at the breakers or at any other connections. The cables to the battery are 1*2AWG, one size thicker than the manual stated, and I have tried to wire the whole system one size...

Hello, I am still fairly new to this solar stuff, so I hope this isn’t a silly question. I have just installed a Growatt SPF 3500ES inverter to help power some appliances and to power all my lighting in my house. It is connected to nine 335w solar panels and eight 115Ah lead acid batteries...

Thank you again for your input. With the help of people like you, I am slowly learning about solar energy and how to install it myself. I think I have calculated all the fuses from the panels to the controller and the AC in and out. The one I find complicated thought is the fuse from the...

Thank you so much for your extensive reply. It definitely has cleared a few things up for me. I have installed one string of 10 panels for now, but not connected it yet until I have calculated which fuses and switches I need to use. This is complicated for me, and I want to be sure I get it...

Hi again, I decided to go for 10 panels, just to keep a safe margin. I have started installing the system, and have connected everything but the batteries. I think I have managed to install all the corect circuit breakers and fuses, except for the batteries. I have 8 batteries, 4s2p of 115 Amp...

Thank you for you reply. It’s nice to get confirmation that I’m starting to understand this solar business a little. I’m a newby and need to figure everything out by myself. There are no solar shops near where I live unfortunately.

I have just bought the SPF 3500 ES model, but am still relatively new to solar, but am trying to do it myself. I only have 335W - 37,8V - 9,3A panels. As the distance between my panels and Inverter is about 100 feet, I wanted to put as many panels as possible in series to keeps the Amps down...

Thank you for sharing your experience so far. In hindsight, do you think it was worth the extra money getting the ES model, or do you think the HVM would have been good enought?

Hi, I have been looking at these inverters as well, and what has made me decide for the ES series is that you can run it without having any batteries if you want to. The other inverter always needs to be connected to a battery bank, from what I understood.

Thank you for your answer. I´m afraid my knowledge is lacking a bit as to understand everything you wrote. My PWM definitely isn´t the best, but also not the worst, so I presume it has the basic standards and protections. My lights are good quality ones, and I always try and wire things one or...

Again, thanks for your reply. I used normal wire that would normally be used for wiring in homes. it doesn´t get warm or anything, so I presume it´s OK.

Thank you very much for your quick reply. Unfortunately I can´t find anything in the extremely thin manual about the output current rating. I presume just over 2A won´t be much of a problem then? Thank again!

Hi, newbie here I´m afraid. I have set up a small off grid system at home, just to deal with some power outages we have here, so we can keep the TV, Internet and fans running. I have an Epever 60A charge controller, hooked up to my solar panels, and six 115 Amp batteries connected in series and...

T Thank you so much again for your reply. I will do what you said, and see what results I get. The battery with the low voltage has been connected this way for about a week now. Shouldn’t it be charged by now?

Hi again, I didn’t manage to measure the batteries before work this morning, but tomorrow I definitely will. I did however disconnect everything at the end of the day, and left the batteries ‘rest’ for an hour. The total of my 4 batteries was 26,3V The top string in the picture was 26,4V and the...