No, the opposite.
Bigger cables are better.
That must be 3S2P to halve the volts from 6S. Thats a solid configuration and it should produce as well as 6S.
Hi and thank you, I really think so from what they say. I noticed that at most I reached 140 volts, in variable weather conditions, with sudden rays of sunshine that caused the tensions to rise suddenly.
No, the day is very cloudy and it has also rained slightly. In short, no sun. Yesterday in this configuration I got peaks of 800 watts, even if at 136v I also reached 1000w. I set everything up just yesterday, so I should try well on sunny days. Today at most always with maximum cloudy weather 400 watts. The panels have a voc of 23.1. Before mounting the new configuration I checked the voltages of both series and they marked 70 volts per string, empty ....
19,1 wmp
So in reasonably good sun, your array should reach 69.3Voc to start the SCC. It will pull the voltage down to near 57.3V which at times might be too low. My understanding is that once started, they usually keep functioning much closer to battery voltage.
After thinking about this, i wonder if you can make a case to EPEver to get a different SCC because you spent a bunch of money and expected their specs to be correct (150V solar capable).
However, at the moment the weather is not clear, but as written I looked at what it had produced in the evening and arrived at about 3.1 kwh. Think that the day at the production level had a break of 1 hour (change string from 1 string in series to 3s2p) and in any case the accumulation result is different. As I told you, the only doubt is only the voltage of the 69.8 volts which I hope is at least sufficient for the 48v accumulation.
If the array voltage once charging has started, only needs to be a few volts higher than battery voltage to work.
In my opinion, in my situation I am at the limit for what concerns the departure, as I had written in 3s2p qin that sunny day I saw 800 watt tips. these days there is bad weather or rather no sun and despite this I managed to produce about 1.4 kwh. Maybe the optimal configuration would be 4s2p to get almost 90 volts, but I think at the time to stop. What I can't digest ... is the fact that we discussed the famous 150 volts of epever.... I would like you to give me your opinion about what I am about to write :
This would be a good test. There is clearly something going on in the Epever that we do not understand.
Yes but this would involve spending another 250 euros I think about 260 dollars .. if we then consider that epever 64200 costs 300 dollars .... But what I have to do is this compressed, which frankly was not calculated based on what was promised by the manufacturer .. in short, their 150 v
I would say yes,
Thank you now I evaluate the situation and I will keep this alternative that you propose.
Hi, today I was able to do the first test with a sunny day except at 13.40 PM that the sky showed variability. At about 12.00 if you look at the voltage of the panels is 63.84 volts and during the morning the delivery from 8.30 AM began to touch 400 watts and then remained around 650 with 720 watt punt but all in a not sudden but fluid way. I ended the day with 3,100 kwh of accumulation equal or little more than the 6-panel series with 136 volt voc. So compared to the series configuration, my personal impression is that clearly the 136 volts push better or a little better in the morning, but on the other hand I believe that the 3s2p conftour is more efficient when not all the panels produce in the same way, this having 2 strings if one string produces less the other makes up for the lack of power. I am very interested in your opinion for the values you see in the graph in particular the voltage of the panels if in your opinion it is in this sufficient configuration or it is always good to evaluate other solutions. However, even if today I accumulated 3,100 kwh because the batteries were quite discharged, but the system managed to go into float (I had seen about 1,97 amps in absorption). In addition, the maximum peak voltage in 3s2p was 59.44 (so there will be the same a small drop to the 58.80 maximum charge of the batteries .... ) . I had also seen at a particular moment where the voltage of the panels was maintained around 64 volts (practically when the batteries were sufficiently charged so the voltage rises and the current decreases ..) . As written, I am happy to wait for your technical point of view. Thank you as always .
Yep, as expected.
The SCC is probably not working as hard (more efficient) converting 64V into 58V (smaller difference). I have heard mention of this before so i am not surprised.
Sounds like its working great! If you can charge empty batteries to float on a winter day, its doing well.
As expected. If current tails off as charging completes, the voltage should rise in proportion to the current decrease (ohms law: amps x volts = watts).
