Terry, I measured the grid voltage at the meterbox of the house at the front of the block which is approx 10 metres from the grid lines. At a guess I would say that the grid voltage is being dragged down by the number of air conditioners in the area working at full strength due to the outside temp being 41* in the shade. The solar output current is currently 22A.
George
Solar quotes for our house
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Re: Solar quotes for our house
George, Julie, Leonie & Sean - Kotara, Newcastle
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Re: Solar quotes for our house
Ummm.... one array is 10 panels @ 32.5v Vmp (STC) = 325v, the other array is 12 panels so a Vmp (STC) = 390v. To drop to 200v means the panels in one array derated its Vmp to around 60% output on a 41*C day and the other array to around 50%

T1 Terry
A person may fail many times, they only become a failure when they blame someone else John Burrows
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Re: Solar quotes for our house
George said the AC volts is 200V, not the panel voltage.
I was commenting on these two points
1. The inverter has a max output of 5.5kW and 23.9a
2. The solar output current is currently 22A.
Which I have just realised are unrelated. oops.
I was commenting on these two points
1. The inverter has a max output of 5.5kW and 23.9a
2. The solar output current is currently 22A.
Which I have just realised are unrelated. oops.
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Re: Solar quotes for our house
At 10:22am when I posted the panel outputs were: East 12 panels - 340.2V 7.5A, West 10 panels - 303.5V 4.9A.
George
George
George, Julie, Leonie & Sean - Kotara, Newcastle
DIY 11.5M 1979 Bedford, Nissan/UD FE6T motor
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Re: Solar quotes for our house
I just read that as voltage output from the panels as it was different to the grid voltage.Newcastle George wrote: ↑Sun Feb 02, 2020 11:22 am I have just noticed that the ACV output from the panels is 200V so on checking the grid voltage found it to be 198.5V so due to the low grid voltage and therefore low solar output volts the watts produced by the solar are drastically reduced.
George
A person may fail many times, they only become a failure when they blame someone else John Burrows
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Re: Solar quotes for our house
I have just measured the grid voltage again at the front house meterbox - 218V at 5:27pm. Terry, I did say AC voltage, not DC voltage.
George.
George.
George, Julie, Leonie & Sean - Kotara, Newcastle
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Re: Solar quotes for our house
George , at a guess I would say that a transformer local to you had dropped an input hv fuse and the measurements you are getting is just your supply phase voltage across a three phase transformer. Probably caused by, as you say, everyone running their airco. It's a bit hard to explain without being able to measure all three phases at the same time. We used to find it quite common after an electrical storm. I am surpised that your inverter did not shutdown due to the low grid voltage.
Cheers
David
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Re: Solar quotes for our house
Dave, our oven did shut down and I am now having trouble restarting it, Dinner was cooked on the BBQ.
George
George
George, Julie, Leonie & Sean - Kotara, Newcastle
DIY 11.5M 1979 Bedford, Nissan/UD FE6T motor
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Re: Solar quotes for our house
George , at a guess I would say that a transformer local to you had dropped an input hv fuse and the measurements you are getting is just your supply phase voltage across a three phase transformer. Probably caused by, as you say, everyone running their airco. Either that or it was just about overloaded ready to melt.It's a bit hard to explain without being able to measure all three phases at the same time. We used to find it quite common after an electrical storm. I am surpised that your inverter did not shutdown due to the low grid voltage. You are lucky your supplier didnt drop supply off to your area for a while. That is what Energex has started doing up on the gold coast and in Brisvegas.
Just found another way to double post while trying to edit. Sorry.
Just found another way to double post while trying to edit. Sorry.
Cheers
David
David and Terrie
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David
David and Terrie
2006 Winnebago Alpine
Not all who wander are lost.