Good day, everyday around about the same time it seems like the inverter stops drawing energy from the solar panels. What will the reason for that be? 

Probably when your battery is full.

15 minutes ago, Nexuss said:

Probably when your battery is full.

If that was the case I will understand, here I have added the state of charge. 

And a second question, I have 10 x 410 watt panels on but hardly seems to draw more than 2500watts? 

What battery do you have ?  Are all the panels on one mppt or split between the 2? Also are all the panels facing the same direction?

Edited February 13, 20223 yr by Nexuss

1 minute ago, Nexuss said:

What battery do you have ?  Are all the panels on one mppt or split between the 2? Also are all the panels facing the same direction?

I have 2 pylontech UP5000, the panels are on 1 mppt. Yes all 10 are facing North North West. 

Okay so that last graph you posted looks strange , can you select the consumption power parameter aswell as production power and SOC please and post that. Preferably of a day that you know was good and sunny with no clouds if possible.Also please check on the battery charge screen what Ah the battery capacity is set to ,aswell as the charging amps . 

Edited February 13, 20223 yr by Nexuss

2 hours ago, Nexuss said:

Okay so that last graph you posted looks strange , can you select the consumption power parameter aswell as production power and SOC please and post that. Preferably of a day that you know was good and sunny with no clouds if possible.Also please check on the battery charge screen what Ah the battery capacity is set to ,aswell as the charging amps . 

 

Thats pretty strange how between 12 and 3 pm you are using battery instead of solar,you dont perhaps have some major shading on the panels in that time? *Edit on second thought something seems to be clipping the pv power by the way the graph has that flat top and not a bell curve.  Can you go on solarman and go to device>inverter> and under the electricity generation copy and paste the values for the active PV string. It should look something like this

PV1-332.90V-8.90A-2.915kW

Edited February 13, 20223 yr by Nexuss

5 minutes ago, Nexuss said:

Thats pretty strange how between 12 and 3 pm you are using battery instead of solar,you dont perhaps have some major shading on the panels in that time?

Nothing at all. Will monitor it again today. But it happens everyday. 

OK ,go on solarman and go to device>inverter, then right at the bottom wil be a graph and parameters ,select DC voltage PV1 and DC current PV1 and post pic of the graph here . Also post a pic of your system mode/work mode screen.

Edited February 13, 20223 yr by Nexuss

@Adriaanvt Please also indicate your selected System Mode settings (desired State of Charge) at the start and end of the solar acceptance, i.e. between about 12:00 and 15:00. (45% or lower after 12:00, increased to >85% after 15:00?)

Under the Advanced settings, what is your Max Solar Power value set to? (2500W ?)

I suspect at the height of the day his panel voltage may exceed what the inverter is happy/specced with/at you wrote 10 panels on one MPPT?, all in series? what are the Voc & Vmp as well as Imp and Isc values?

7 hours ago, Nexuss said:

OK ,go on solarman and go to device>inverter, then right at the bottom wil be a graph and parameters ,select DC voltage PV1 and DC current PV1 and post pic of the graph here . Also post a pic of your system mode/work 

Is there another version of solarman this I cant select DV voltage PV1

Just now, Adriaanvt said:

Is there another version of solarman this I cant select DV voltage PV1

 

Solarman smart on PC .

1 hour ago, Kalahari Meerkat said:

I suspect at the height of the day his panel voltage may exceed what the inverter is happy/specced with/at you wrote 10 panels on one MPPT?, all in series? what are the Voc & Vmp as well as Imp and Isc values?

The panels are 5 in a string with a Y join(I think that's what its called) 

4 minutes ago, Adriaanvt said:

The panels are 5 in a string with a Y join(I think that's what its called) 

ok, so 5 in series and the other 5 series string in parallel, now at 410W, let's assume 72Vmp /panel times 5 would be 360V, probably still in spec, but not 100% sure, unless you supply the specs one cannot check this... if it is these JA Solar 410W Mono MBB Percium Half-Cell for instance, then Vmp is ±34V, lower than I'd imagined, but the Imp is ±13A and if you have the parallel setup, then you it won't do you much good, since the inverter will probably not consume more than 11A on each MPPT input, and it would make sense to have all 10 in series instead, but.... it all depends on what panels you have and what their specifications are. It seems most 400-odd W panels are around the 40Vmp range and thus the current will limit you severely unless you can series the whole lot (assuming the combined Voc is still within spec for the inverter) or split the parallel strings onto both MPPTs instead, but assuming the 13A Imp apllies you may never see max power out of the panels, if memory serves the inverter will only take 11A on each MPPT.

21 minutes ago, Adriaanvt said:

The panels are 5 in a string with a Y join(I think that's what its called) 

we really need to see your pv string data... if you are paralleling 5 panels x2 on one mppt you will be for sure maxing out the amps and it would explain the graph being flat at the top. What you want is 10 panels on one mppt in one series string ,or 5 panels per mppt both in series.

Edited February 13, 20223 yr by Nexuss

8 minutes ago, Kalahari Meerkat said:

ok, so 5 in series and the other 5 series string in parallel, now at 410W, let's assume 72Vmp /panel times 5 would be 360V, probably still in spec, but not 100% sure, unless you supply the specs one cannot check this... if it is these JA Solar 410W Mono MBB Percium Half-Cell for instance, then Vmp is ±34V, lower than I'd imagined, but the Imp is ±13A and if you have the parallel setup, then you it won't do you much good, since the inverter will probably not consume more than 11A on each MPPT input, and it would make sense to have all 10 in series instead, but.... it all depends on what panels you have and what their specifications are. It seems most 400-odd W panels are around the 40Vmp range and thus the current will limit you severely unless you can series the whole lot (assuming the combined Voc is still within spec for the inverter) or split the parallel strings onto both MPPTs instead, but assuming the 13A Imp apllies you may never see max power out of the panels, if memory serves the inverter will only take 11A on each MPPT

The installer that installed the panels 18 months ago quoted for Canadian 410w. My old inverter was struct by lightning and I bought this one with the insurance payout and got a electrician to install it for me. I had a Mecer 5kw before

7 minutes ago, Adriaanvt said:

The installer that installed the panels 18 months ago quoted for Canadian 410w. My old inverter was struct by lightning and I bought this one with the insurance payout and got a electrician to install it for me. I had a Mecer 5kw before

ok, pretty sure you need to change the panels to be all in series or worst case, split over the two MPPT's, the Mecer being mostly likely a lower Voltage, 160V max on the solar input side, whereas the sunken sun, is up to 500V or so max, which of course you want to stay away from, but 450V or so should be ok...

The specs for the panels seem to be:

Imp 10.49A
Vmp 39.1V
Isc 11.06A
Voc 47.6V

That'll be perfect for 10 series panels which should run at 391V and 10.49A max, it'll be slightly less, likely, but 10 series panels would be the way to go, here.

If I have the Sunsynk specs right the MPPT input range is up to 500V max and running range is 100 to 450V, which at less than 400V for 10 panels would be the right route to go, also the current input is 11A max, which also the 10panel string would satisfy.

Edited February 13, 20223 yr by Kalahari Meerkat

6 minutes ago, Adriaanvt said:

The installer that installed the panels 18 months ago quoted for Canadian 410w. My old inverter was struct by lightning and I bought this one with the insurance payout and got a electrician to install it for me. I had a Mecer 5kw before

yea that makes more sense , the Mecer  has lower voltage mppt's that can handle higher current ,the Sunsynk is the opposite ,the installer should of changed the wiring of your PV array to 10 panels in one series string.

Canadian Solar 410W Bifacial Poly Solar Panel - CS3W-410PB-AG

Vmp 39.1V

Imp 10.49A

Voc 47.6V

Isc 11.06A

10* Vmp is near the ideal operating voltage of 370V, although 10* Voc is over MPPT's 425V operating limit.

Imp is within 11A limit, but certainly not 2 strings in parallel, unless connected to separate MPPTs. (Then 5* Voc is at 238V, which is well over min MPPT range of 125V)

Edited February 13, 20223 yr by LoodPyp
Edit inverter info

32 minutes ago, Kalahari Meerkat said:

 if memory serves the inverter will only take 11A on each MPPT.

It does 13 amps on each mppt, my panels produce 12,2 amps quite regularly,more than their rated spec.

So far we have not found any reason for the sudden drop in PV 12h00 to 14h00.

Even if 2 string of 5 panels in series we get 2 x 10A x 39V x 5 = 3900W. Now because the single MPPT used only uses 11A the inverter should throttle the output at the 12h00 level. This in itself is no reason for the sudden drop down to 60W at 14h04 on 12-02-2022. The voltage is high enough to start the MPPT just after 06h00. Even when panels are loaded the voltage seems to be high enough up to 12h00.

As already indicated by connecting all 10 panels in series should increase the PV to about 3900 x 0.8 = 3120W Connecting 5 in series per string should provide the same output and then the 2 x MPPTs are balanced.

If each string has 5 in series it would have exceeded the 145V of the older spec Axpert. So the actual connection must be confirmed but I doubt it is part of this problem.

Chances are that whatever is cutting the PV might still do it.

4 hours ago, Adriaanvt said:

The installer that installed the panels 18 months ago quoted for Canadian 410w. My old inverter was struct by lightning and I bought this one with the insurance payout and got a electrician to install it for me. I had a Mecer 5kw before

We need the exact model number for the panels so that we can pull the correct spec sheet, otherwise it's all guesswork.