Jaxone

This is what I have done for the past 2 weeks ... fighting with EaSun I write an e-mail , they answer after 2 days ... I reply within 10 minutes... they answer next day or next 2 days ... this is going to take a while but hopefully will be solved before I buy a new inverter.

@SmittySmit Inverter is an Voltronic licensed SMV IV 5600W ,you can see the details here : Next step is to change the inverter, even if I don't use the 4KW , I would like to know that is working as intended ... yeah , I am being to picky maybe for the price I paid for this inverter but still , others have same inverter , older firmware and works.

@GreenFieldsI would totally agree with you and your arguments IF I could see some peaks over 4000W , but looking at the PV power today during whole day , with load and no load and charge and no charge and all the configurations I have tried , the PV power is ALWAY 4000MAX !! If it would have went at 4200 sometimes or hold at 3900 or 4170 or something I would totally tottaly agree with you ... but something does not seem right to me. 4000W max with 14 panels , 4000 watt max output with 16 panels and 4000W max also with 18 panels ??? Seems a bit odd. But as I said , I've ordered 4 more panels , if the inverter will produce more than 4000W with this added to the array , I will shoot myself 😊

@Coulomb - I've talked this week with 2 more people that have same inverter as me. They have no problems getting 6K from this unit , BUT there is a big BUT here ... they have DIFFERENT firmware on them, older it seems. I have this version : While they have an older firmware on Secondary CPU : You don't happen to have this ?

Yes, that was the idea when I installed 18 panels , not because I need the 4000W but because I can get more power in the morning and late in the afternoon. And today I have ordered 4 more 390W panels just to convince EaSun Support that it's not a paneling problem. So I will run with 2 strings of 11 Panels which should give me around 8250W. I can always move some panels on West side to catch some more late sun. But I guess this topic can be considered closed for now Thanks everyone for input and moral support

Well,for me it is hard to believe that my panels can produce ONLY 4W Watt CONSTANTLY (with interruptions where I made various tests with the strings , stopping battery charge so I can test charging also later during the day ) from 12 to 15 , while sun changed position, without somehow being capped at 4000watt. At around 14:40 I reduced the battery charging current and left BMS to manage the rest.

I was thinking to go with a 3.6kw system at first that accepts 6000W on the MPT , then buy one more when I have money to expand. Or have the damn chinese sort my firmware 😊 We tested with both 10-11-12 in series and we always come at MAX 4000Watt. Tested with 2 strings of 6 and we come 3600Watt , acceptable loss , no problem. Then we tested with 2 strings of 7 … max 4000Watt at 17.9Amps Then we tested with 2 strings of 8 … max 4000Watt , amperage 16A Then we tested with 2 strings of 9 … max 4000Watt , amperage 13A So no matter how we combine the strings the inverter is ALWAYS limited at 4000Watt.

Today was a very sunny day and we made some tests. We tested with both 10-11-12 in series and we always come at MAX 4000Watt. Tested with 2 strings of 6 and we come 3600Watt , acceptable loss , no problem and it was around 10AM. Then we tested with 2 strings of 7 … max 4000Watt at 17.9Amps Then we tested with 2 strings of 8 … max 4000Watt , amperage 16A Then we tested with 2 strings of 9 … max 4000Watt , amperage 13A So no matter how we combine the strings the inverter is ALWAYS limited at 4000Watt. We tested this with load on AC side and load on battery charging. So it looks like panels are delivering both Volts and Amperes but the inverter just does not accept more than 4000W on PV or I have some very bad leackage on my wires. I have around 25M 6mm2 solar panel wire between the Panels and Inverter. I guess I will have to live with it until I get another inverter to test with. 😐

Not sure what you mean by 9S1P and 1S9P .. just starting my solar journey. I have them configured like I said, 2 parallel strings of 9 in series.

I will take it down No problem, for my peace of mind I will also try this. The photo is taken in the afternoon around 4-5pm , in the morning the shadow will never be there.

It's my flag pole but it is now shading the panels , even if it would , that small shade can not cause 2500watt loss

That's what I thought also when I found the alternative to Elerix, was trying to match voltage and current as close as possible to avoid to much loss. Even if the 375w pull down a bit the 380w I don't mind loosing 100-500w from the grand total of 18 panels. I was talking with @Scorp007and he suggested me some good brands and one of them is on the approved list , like Solis. So I am pending now between Solis and GoodWe which is also on the list. I just wanted to eliminate the bad panels configuration before I go to the next step and change the inverter. Here the list : https://www.danskenergi.dk/sites/danskenergi.dk/files/media/document/Solceller_0.pdf

Not sure if you can somehow pull some data from PVOutput ? https://pvoutput.org/

Any update on your case ?

Hi guys. As some of you have seen I am struggling to understand things about the power loss in my installation and thinking what and what not. I am running 18 Panels in 2SP , 9 in each string. I started with 12 Elerix 380W panels. 12 in one string was to much so for a while I was running with 11 in one string. When I wanted to order 6 more , it was out of stock and I could only order Canadian Solar 375W , Canadian Solar HiKu CS3L-375MS. Then I made 2 strings with 9 panels per string. As I am a noob and installed the 12 Elerix first , I added the HiKu where I could and where I had place. So each string is configured as : 1 x HiKu + 6 Elerix + 2 Hiku again. Now, the electrical characteristics of this panels is VERY close to each other and even if I have some loss , I would not mind with 100-200W per string , but I struggle to find the rest Characteristics for the Elerix Half Cut 380Wp 120 cells: Electrical Specification EXS-380MHC-B Maximum Power (Pmax) 380W Module Efficiency 20.90% Open Circuit Voltage (Voc) 41.30V Short Circuit Current (Isc) 11.69A Maximum Power Voltage (Vmp) 34.80V Maximum Power Current (Imp) 10.92A Electrical DATA@NOCT EXS-380MHC-B Pmax [W] 283.80 Vm [V] 32.40 Imp [A] 8.76 Voc [V] 38.70 Isc [A] 9.45 Characteristics for the : Hiku mono 120 Cels ELECTRICAL DATA | STC* CS3L 375MS Nominal Max. Power (Pmax) 375 W Opt. Operating Voltage (Vmp) 34.3 V Opt. Operating Current (Imp) 10.94 A Open Circuit Voltage (Voc) 41.0 V Short Circuit Current (Isc) 11.61 A Module Efficiency 20.3% ELECTRICAL DATA | NMOT* CS3L 375MS Nominal Max. Power (Pmax) 281 W Opt. Operating Voltage (Vmp) 32.2 V Opt. Operating Current (Imp) 8.75 Open Circuit Voltage (Voc) 38.8 V Short Circuit Current (Isc) 9.36 A I know , if possible one should not combine panels in one string , but this is the situation and I go with what I have. Could this configuration make me loose 2800Watt ? Here we think PANELS ONLY , no other factors like tilt , temperature , etc, thinking pure solar panels, I am trying to find the bottleneck by elimination process. Slap me , beat me , i'm fine with that as long as I learn something

Mine stops producing at around 8pm ... it's summer here. If I can show the same in the winter I would be happy

Today i am 100% sure the inverter is limiting the power at 4000W on PV side ! No question about it. I've set the max charging amperage at 100A and watched the PV load. I see how amperage and voltage play around just to come with same max wattage. I've seen peaks of 18A on PV side and then I see the inverter taking that down to 13A stable and 313V thus limiting the power at 4000W. Also if I increase the load on AC consumers I can clearly see the PV power going up until 4150W ... this is no coincidence. So there is NO question (at least for me) that the panels are performing as they should and the bottleneck is the inverter.

Hi guys , again with a question .... I was about to make the grounding for the panels when one page in the manual hit me ... and this seem to be on all Voltronic licensed products. WARNING: Because this inverter is non-isolated, only three types of PV modules are acceptable: single crystalline and poly crystalline with class A-rated and CIGS modules. To avoid any malfunction, do not connect any PV modules with possible current leakage to the inverter. For example, grounded PV modules will cause current leakage to the inverter. When using CIGS modules, please be sure NO grounding. My inverter is grounded and the rest of the installation also , I was only missing the panels and I made separate ground point for them and I was about to hook it up. So ... errrr ... should I not ground my panels ? ... or what should I understand from this ?

@Scorp007 Do you have bureaucracy in SA ? 😂 We do have some very tight ass people in the government departments (especially in the energy one where the big bucks are) and IF the EXACT NAME and model is NOT on the list ... you can forget of ever getting it on grid so if the name is NOT SunSynk on the label ... it's a no go.

@Scorp007 You are getting somewhere there ... maybe ... I might go towards Growatt and for 1 reason : I might want to go ON Grid later when I add some more panels. In Denmark where I live , there is a list with approved On Grid inverters and only those can be connected to the grid. Growatt is one of the producers that is on the approved list ...Sunsynk and Deye are not (Voltronic either). Also Sunsynk does not seem to have a strong market in Europe as I can not find any sellers

We live and learn , and then when we know the most we die

I did not save for better days , I just thought 5,6K will be enough , and it is indeed , I don't need more , it's just frustrating to see I did not got what I thought I will. So 4K is MORE than enough for my needs as I only have 450w continuous loads on my inverter + 1000w occasional when I am in the workshop. I already save around 70% on my electricity bill in the past 3 months and with the prices this days this is very good for me. It's just "Why does it not do what it suppose to" .. this does not let me sleep at nights 🤣 I do not doubt your experience , I just wonder myself WHY the following issue : If I put 11 panels in one string I DO get around 3,5KW on PV with around 8-9amps. If I make 2 parallel strings of 9 Panels I also got only 4K on PV ? It's not double up of the 11 panels in series , but almost and I should still get more PV with 18 in 2SP than 11 in one string. Correct ? Damn , I will wait for a full sunny day and go on roof and start mixing strings and panels

Unfortunately the roof of my house is like it is I don't want to lift them up more than the roof as we have quite a lot of strong winds here and I would rather loose some PV power than loose the panels / roof. I agree that I should have some PV loss but still not as much in this month. Seeing the PV spiking at 4500Watts and then being reduced automatically down to half just to be left to climb slowly up to 4K and HOLDING steady there makes me strongly believe the PV is limited within the inverter at 4K. If I apply more load to AC I can see it is willing to climb the PV around 4150W ... the wattage of the PV is way to stable around 4K , this is what makes me be 100% sure the limitation is within the inverter and not the PV array. I am even willing to invest 1000eur more to buy a Axpert MAX 7200 just to prove this theory .. but I guess this will have to wait a bit as budget is exhausted.

55.01876372062922, 9.569021797419618 But I am 100% sure the panels can make more than what the Inverter is processing.

I can not run with 12panels in series because it will trigger VOC overload. The highest I could run was 11 in series. I have seen 64A on battery charging also while keeping an eye on the voltage , just did not recorded it.. I am ruining with USE settings on the battery because the firmware of the inverter will not talk with the US3000C , only with US2000B and I need to have the US3000C as master else whole pack won't work properly. Furthermore , I have tried to increase the load on AC side up to 2KW now , battery charging will drop to 40-45A and PV side will never go over 4000W. I guess this deletes the theory with the limitation of the battery charging..