GrootBaas' Solar

GrootBaas said:
I may be under a misperception. Will the peak generation be when the sun hits the panels at 90 degrees? So if the sun has gone over the 90 degree angle, then you are over your peak and the angle will get worse (although it's summer and thus the duration is much longer).

If I look back at the graphs, it seems like I peaked higher a few weeks ago unless there are other factors.

Giving my system a run for its money again today. Pool pump is not running but have an aircon going and the domestic using vacuum etc. Have only recharged the battery to 68% now (13:30). May need to switch off the aircon to get to 100%
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yes angle matters (that's what she said) as do other factors like heat etc etc
 
DawieZA said:
My 5.52 kWp array here in Boston is only reaching 4.6 kWp at the moment. That is with 6 panels facing east and another 6 panels facing north (2 strings). The performance should be getting better as the sun's angle changes with summer heading our way. I am happy with that performance as at 12:00 my two 5.32 kWh batteries are fully charged, and my two geysers are at max temp.
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Not sure if possible, but can you show a graph of only your panels that are facing North? That would mean a total of 2.76kWp right? Would love to know what you peak at for that string in isolation.

Was reading up now on Irradiance and how the panels are rated. Still feels to me like I should be getting more out of them at the moment (maybe it's just hope though!)
 
Got 4 panels facing East and 4 West. This is my curve. 12h00 is combined peak. So the sun at 90 degree giving optimal performance does make sense.

1697548476850.png
 
GrootBaas said:
Not sure if possible, but can you show a graph of only your panels that are facing North? That would mean a total of 2.76kWp right? Would love to know what you peak at for that string in isolation.

Was reading up now on Irradiance and how the panels are rated. Still feels to me like I should be getting more out of them at the moment (maybe it's just hope though!)
Click to expand...
1697550735878.png

That is the north facing string only. 2.27 kWp for today with 6 x 460 W panels.
 
8 x 450, 3600 in total. My best combined peak was 2.8 kW, average combined daily peak 2.5 kW. Best single string peak (four east panels) was 1.5 out of 1.8.
 
If you have the budget go for 2 row of panels.
You can go for the 5** watt or 6** watt panels.
If sun is not available for that day, you have at least some sort of power generation.
One row not ok.
You have to use 8kW inverter.
 
GrootBaas said:
I may be under a misperception. Will the peak generation be when the sun hits the panels at 90 degrees? So if the sun has gone over the 90 degree angle, then you are over your peak and the angle will get worse (although it's summer and thus the duration is much longer).

If I look back at the graphs, it seems like I peaked higher a few weeks ago unless there are other factors.

Giving my system a run for its money again today. Pool pump is not running but have an aircon going and the domestic using vacuum etc. Have only recharged the battery to 68% now (13:30). May need to switch off the aircon to get to 100%
Click to expand...
Heat plays a major role
 
Hi guys
Anyone have an idea how long the city of Cape Town takes nowadays for COC's? I'm still waiting on mine and the installer claims they are not hearing anything back from the city. They supposedly submitted end of August.
 
Are you referring to your application for authorisation to install an embedded generation system (SSEG)? The electrical certificate of compliance (CoC) would have been issued by electrician that was part of the installer team.
 
DawieZA said:
Are you referring to your application for authorisation to install an embedded generation system (SSEG)? The electrical certificate of compliance (CoC) would have been issued by electrician that was part of the installer team.
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Ah okay. Thanks for that clarity. It's the sseg that they are talking about, but I also dont recall getting a coc so will ask them about that now.
 
Received this feedback:
Please find attached Application that was submitted to the City of Cape Town. We will set up an appointment to do your COC as soon as we can.


We received your notification number yesterday from the city.

NN : XXXXXXXX


Now we wait for the Supplementary contract, I will update you when we have received it.
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The installer should receive the permission to install letter and supplemental contract from the CoCT in due course. The permission to install letter would include these requirements (based on mine):

- Final copy of circuit diagram.
- GEN/EMB, Appendix 1 – SSEG Installation Commissioning Report by an ECSA-registered electrical professional.
- Signed Supplemental Contract for Embedded Generation. The contract must be completed in consultation with the City official handling your application.
- A copy of the electrical installations Certificate of Compliance.
 
Morning. Any idea what would cause the sudden drop in the battery from 38% to 0%?
9ddc9c044b8405f9c1e5337fd9644893.jpg
 
GrootBaas said:
Hi guys
Anyone have an idea how long the city of Cape Town takes nowadays for COC's? I'm still waiting on mine and the installer claims they are not hearing anything back from the city. They supposedly submitted end of August.
Click to expand...
Submitted initial application on 25 Ag 2023.
Received permission to install 18 December 2023.
Submitted on 14 March 2024:
1) Final Copy of Circuit Diagram
2) GEN/EMB, Appendix 1
3) Signed Supplemental Contract
4) Copy of the Electrical Certificate of Compliance.

Sent a follow up email on 17 April and received a reply 10 May to say it's awaiting final sign off.
Rec'd final commissioning approval on 20 June 2023.
 
Bunta said:
Perhaps BMS Drift / comms issue, because it seems as though it jumps back to 30ish% at 18h00?
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Doesn't quite jump back, it seemed to have charged back to 35% which is what I have set as the minimum.
 
GrootBaas said:
Doesn't quite jump back, it seemed to have charged back to 35% which is what I have set as the minimum.
Click to expand...
Charged from Grid? No idea then. Unless you lost grid power and it drained the battery. But if you have SOD set at 35%, it should not have drained to 0%.
 
Bunta said:
Charged from Grid? No idea then. Unless you lost grid power and it drained the battery. But if you have SOD set at 35%, it should not have drained to 0%.
Click to expand...
Yeah charged from grid. Very strange. Should not have dropped below 35%. No errors on the system that I can see either.
 
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