Let the sunshine in!

Now THIS is what solar power production should look like on a sunny day! ​I am so happy I could sing, but no one wants that, so instead I'll link to this YouTube video :)
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Our house power was out today while Xcel installed a new transformer.  Greg from Innovative Power Systems was kind enough to get over hear within a short time after power was restored to make sure the system was all in good working order.
​He got here in time to test out the system on the new transformer just as we were at peak production for the day, which made for a very good stress test (thank you Greg!).

The system worked beautifully!
If you read some of my earlier blogs, you know we have been struggling with this for some time.
​Below is a sunny morning from last October which shows how the system behaved as the power climbed.  Usually one of the inverters would reset itself because the Voltage got too high.  Sometimes a pair would reset.
​The graph below shows what a system should NOT be doing on a sunny day.  The dashed lines in both of these show the power generated from each of the three inverters.

​This is such a huge relief and I want to thank Greg and the crew at IPS for hanging in there and getting this fixed.

What I found more interesting was seeing how the voltage behaved on each day.

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Here you can see how steady the voltage is now, as opposed to before.
​Also, you can see the voltage on line 1 and line 2 are identical now, where before they varied a bit.
​Line 1 and 2 should each be in the 120-125 range, giving a house voltage in the 240-250 range.
​Normally, the house power is very close to 240 Volts.
​However, when our solar panels are pushing energy back out to the grid, the voltage rises just a bit.  That voltage adjusts very slowly and smoothly, when working properly.
​Before, the voltage not only spiked much higher, but it was not at all smooth, and Line 1 and Line 2 were not identical.

I am very happy we got a chance to test the system out today.  The rest of the week looks pretty rainy, so I would have had to hold my breath for days, if not a week, and I am no good at that ;)