I was wondering in diffrent regions of SA those with monotoring software, what is the maximum time that Imp max value was observed from your SCC and for how long? I have seen on my own istallations during summer with clouds that Imp will spike to nameplate rating for 5~30 seconds. Is there anyone that has experienced longer periods. I am specifically interested in the maximum current in series strings and strings in parallel. 

If you could be so kind to state your Province, Solar panel manufacturer and Power rating and also SCC( or inverter manufacturer and specifications) and lastly load connected and battery Soc when observation was made.

Many thanks.

7 hours ago, TaliaB said:

I was wondering in diffrent regions of SA those with monotoring software, what is the maximum time that Imp max value was observed from your SCC and for how long? I have seen on my own istallations during summer with clouds that Imp will spike to nameplate rating for 5~30 seconds. Is there anyone that has experienced longer periods. I am specifically interested in the maximum current in series strings and strings in parallel. 

If you could be so kind to state your Province, Solar panel manufacturer and Power rating and also SCC( or inverter manufacturer and specifications) and lastly load connected and battery Soc when observation was made.

Many thanks.

I will send you info on your request give me a few days.

Here goes: (added at bit more info for context)

Wattage Recorded: 9018W

Imp: 16.1A & 13.5A

Imp Ratio: 16.1/18.36 = 87.7%

Date & Time: 30 July 2024 @ 10:53:44

Duration: 108s

Max. Normal Production: 7484W (31 July 2024)

PV last cleaned: 16 July 2024

Province: Gauteng

PV Manufacturer: Canadian Solar

Power Rating: 32 x 365W = 11680W

PV Composition/Orientation: 8S2P - North, 8S2P - West

System: Sunsynk 8.8kW

Load: 3044W

Battery SOC%: 69%

Edited August 1, 20242 yr by Sidewinder
Added Imp values

2 hours ago, Sidewinder said:

Here goes: (added at bit more info for context)

Wattage Recorded: 9018W

Imp: 16.1A & 13.5A

Date & Time: 30 July 2024 @ 10:53:44

Max. Normal Production: 7484W (31 July 2024)

PV last cleaned: 16 July 2024

Province: Gauteng

PV Manufacturer: Canadian Solar

Power Rating: 32 x 365W = 11680W

PV Composition/Orientation: 8S2P - North, 8S2P - West

System: Sunsynk 8.8kW

Load: 3044W

Battery SOC%: 69%

Great information but is the question not around producing at a Imp level or higher and for how long? 

This I read if your system got to 11680W or higher

4 hours ago, Sidewinder said:

Here goes: (added at bit more info for context)

Wattage Recorded: 9018W

Imp: 16.1A & 13.5A

Date & Time: 30 July 2024 @ 10:53:44

Max. Normal Production: 7484W (31 July 2024)

PV last cleaned: 16 July 2024

Province: Gauteng

PV Manufacturer: Canadian Solar

Power Rating: 32 x 365W = 11680W

PV Composition/Orientation: 8S2P - North, 8S2P - West

System: Sunsynk 8.8kW

Load: 3044W

Battery SOC%: 69%

Thanks @Sidewinderfor the information i see the North Imp= 16.1A -Imp 18.36 A.( 365w Canadian2p) = 2.26A before reaching IMP. Not bad going for this time of the year but seems Jozi was pushing the solar as of late but can't say the same for Western Cape this year's winter was a disaster in more than one way.

Thanks @TaliaB & @Scorp007, updated my stats with duration and Imp ratio (made sense to me)

@TaliaB The best that I can provide is the following. Not having more detail. 

Imp=8.71A 285W 

Solis 4G grid tied on 28/7. 

Series string of 6.

Peak current 7.1A midday. Not seen anything close to Imp this month. Will have to wait quite a bit longer for higher irradiation. 

 

 

Edited August 1, 20242 yr by Scorp007

@TaliaB From December 2023 to show some clipping.

KZN Midlands

Canadian Solar 415W

Imp = 10.56A

Isc = 11.14A

Vmp = 39.3V

Voc = 47.8V

MPPT2:- P2S6 (12 panels) = 4980W, Voc 286.8V, Vmp 235.8V  Total

Facing 25 Deg NE ( N=0 Deg, E=90 Deg, S=180 Deg, W=270 Deg), Elevation tiled roof +- 22 Deg.

SunSynk 8.8 kW +- 2021, never upgraded Firmware.

 

 

Edited August 1, 20242 yr by TimCam

1 hour ago, TimCam said:

@TaliaB From December 2023 to show some clipping.

KZN Midlands

Canadian Solar 415W

Imp = 10.56A

Isc = 11.14A

Vmp = 39.3V

Voc = 47.8V

MPPT2:- P2S6 (12 panels) = 4980W, Voc 286.8V, Vmp 235.8V  Total

Facing 25 Deg NE ( N=0 Deg, E=90 Deg, S=180 Deg, W=270 Deg), Elevation tiled roof +- 22 Deg.

SunSynk 8.8 kW +- 2021, never upgraded Firmware.

 

 

Thanks @TimCamthat is very efficient production 95% of Imp but 77% of Mppt max current input. At 07h00 you are on Vmp max with very little current flowing whereas it starts to drops at around 07h30 when current starts to flow. Very good data thanks again.

Edited August 1, 20242 yr by TaliaB
Correction on calculation

Unfortunately the old SunSynk 8.8 kW could only process between 18 - 20A per MPPT, mine is one of those, so no 26A for me, therefor the clipping at 19.8A. 😢

9 hours ago, TimCam said:

Unfortunately the old SunSynk 8.8 kW could only process between 18 - 20A per MPPT, mine is one of those, so no 26A for me, therefor the clipping at 19.8A. 😢

Ah ok not the end of the world you only loosing 5% at peak production. For future expansion you can always up the voltage by adding panels in series to each string.