Don't believe everything you read on the Internet
Unusual Generation in the Morning
- Thread starter BaldDave
- Start date
Sergio95050
New Member
That's how I could place all my PV panels. No alternative !
Planning adds rails for install new four panels at E slope instead of old Dasol's (it was a test initially - how E slope would work?).
You may not have a choice of where to put the panels, but the 'bad planning' reference by @timselectric related to putting them on one string.
Sergio95050
New Member
As I see (for last 8 years), the optimizers do its job nicely. Sunny days, shadows fighting, winter time ...
timselectric
If I can do it, you can do it.
- Joined
- Feb 5, 2022
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- 19,796
Ok, you have convinced me.
It was the best you could have done.
It was the best you could have done.
Sergio95050
New Member
I will return to the theme if I'll fix one or two broken inverters what I'm keeping for tests. Then will split to strings and monitor each inverter.
AFAIAA it was an academic study in Australia, 8 years ago.Don't believe everything you read on the Internet
LOL?
Sergio95050
New Member
It’s completely solved now!
Here is a recap:
1) Single string in series 6 East Panels 6 West Panels starting to yield power suddenly at around 09:30 rather than gradually from around 05:00. All panels optimised.
2) All say it’s daft to have a string like that. Tigo say similar…that it’ll lose power at either end of a day and they don’t recommend it.
3) The installer agreed to change it at his cost with an extra inverter
4) Before he did, I suggested swapping the strings over on their MPPTs to see if it was a string based issue or inverter based. The problem stayed with the MPPT! So the 12 West Panels were now the ones with daft yield figures.
5)The installer contacted LuxPower and they must have done some algorithm tweaking as two days later…and since it’s all worked brilliantly! Example of today early morning sun. The curves predicted by SolCast actually happen. Just a spot reading. At 06:30 today SolCast predicted 1.7KW, it was higher at 1.8KW
Conclusion: unexpectedly, a single string 6 East and 6 West, fully optimised - at least with Tigo gear - works brilliantly when MPPT algorithm is set up well.
I was not expecting that and can provide screenshots of yield for a sunny day if any want to see the detail!
Here is a recap:
1) Single string in series 6 East Panels 6 West Panels starting to yield power suddenly at around 09:30 rather than gradually from around 05:00. All panels optimised.
2) All say it’s daft to have a string like that. Tigo say similar…that it’ll lose power at either end of a day and they don’t recommend it.
3) The installer agreed to change it at his cost with an extra inverter
4) Before he did, I suggested swapping the strings over on their MPPTs to see if it was a string based issue or inverter based. The problem stayed with the MPPT! So the 12 West Panels were now the ones with daft yield figures.
5)The installer contacted LuxPower and they must have done some algorithm tweaking as two days later…and since it’s all worked brilliantly! Example of today early morning sun. The curves predicted by SolCast actually happen. Just a spot reading. At 06:30 today SolCast predicted 1.7KW, it was higher at 1.8KW
Conclusion: unexpectedly, a single string 6 East and 6 West, fully optimised - at least with Tigo gear - works brilliantly when MPPT algorithm is set up well.
I was not expecting that and can provide screenshots of yield for a sunny day if any want to see the detail!
Sergio95050
New Member
Please, do.
Sergio95050
New Member
Do you have any technical/programming details of such brilliant changes?
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