Compatability issues with SMA HF and Sanyo panels

[edexlab]

Re: Help with fault?

@ Biggs, my tester doesn't like me trying to get a resistance when there's lots of DC voltage present, how is this done?



I think the only way you could do this in the day would be to cover the array and test this would be pretty difficult to do, when we first started I did this on a small display array of 4 panels we had just to see how practical it would be , simple answer is it isn't but it may well rule out the panel fault theory

 

[ExtremePV]

Re: Help with fault?

Try enabling optitac. I've got a hunch it might help...

 

[The Launderer]

Re: Help with fault?

Our first install, on my own house is 12 x Sanyo HIT N240's in 1 string and SB 2500HF. The weather in Central Scotland has been pretty crap since the install last week and the generation figures are not impressive.

These are the figures:

Fri 30/9/11 - 4.9kWh
Sat 1/10/11 - 0.5 kWh
Sun 2/10/11 - 2.3kWh
Mon 3/10/11 - 2.9kwH

Can anyone tell me if these are typical figures or have I got a problem?

 

[confounded]

Re: Help with fault?

It is quite likely you have a problem, certainly when only generating 0.5kWh on Saturday, although the fault we have is only occurring on the clearest and brightest days.

I recommend you interrogate your data on Sunny explorer by connecting to your inverter using a bluetooth enabled lap top. The fault being discussed on this thread is very distinctive due the the drop off being so rapid (3000W down to 300W for example) and then holding at a low level until reset.

 

[edexlab]

On Sunny explorer can you access any events logged like on the sunnybeam ? ie grid disturbance I can't find this
I know you can look at the graphs to see when drops in output occur which will give you times etc, but when you have a scenario like this it would be useful

 

[The Launderer]

Re: Help with fault?

It is quite likely you have a problem, certainly when only generating 0.5kWh on Saturday, although the fault we have is only occurring on the clearest and brightest days.

I recommend you interrogate your data on Sunny explorer by connecting to your inverter using a bluetooth enabled lap top. The fault being discussed on this thread is very distinctive due the the drop of being so rapid (3000W down to 300W for example) and then holding at a low level until reset.

Got MCS accreditation visit tomorrow. If we pass I am really going to get into the nitty gritty of interrogating the inverter.

Saturday was a really horrible day - rained all day and very dark all day.

Sorry if I am on the wrong thread. New here and not to sure of the protocol. Should I have started a new thread?

 

[confounded]

Re: Help with fault?

Got MCS accreditation visit tomorrow. If we pass I am really going to get into the nitty gritty of interrogating the inverter.

Saturday was a really horrible day - rained all day and very dark all day.

Sorry if I am on the wrong thread. New here and not to sure of the protocol. Should I have started a new thread?

Ok, good luck with your MCS certification, a fault will be obvious when you do get a chance to interrogate with Sunny Explorer.

There is another thread that may interest you.
[h=2]Low system output during indian summer? [/h]

 

[Energetic]

Explorer has been really useful for hunting out our issue. The daily graphs i have posted in this thread clearly show the problem. The data can also be exported in .csv files for each day showing the output in 5 minute intervals which is quite useful.

Event logs can be accessed and also exported to excel files with more detail than what is available on sunny beam.

 

[The Launderer]

Re: Help with fault?

Ok, good luck with your MCS certification, a fault will be obvious when you do get a chance to interrogate with Sunny Explorer.

There is another thread that may interest you.
Low system output during indian summer?

Indian Summer in Scotland? You're having a laugh!!

More like Monsoon. Our Indian summer amounted to 1 nice afternoon.

 

[Energetic]

Advised today that the TL inverters as stated by morgan123 in a previous post can power down if there's no earth connection as they dump, which is why they shouldn't be on a 30mA RCD.

Inverter swapped today for another brand...

Thanks to SMA UK for their help and support. Just waiting on a sunny day to see if it worked... Will keep you informed...

 

[Energetic]

Just to update this thread, the new fronius inverter is working perfectly.

 

[Yanman]

Thats answered my question on another thread. I will definately be fitting a Fronius IG30 to 12 240w Sanyo panels and not the sunny boy. Theyre great these forums.

 

[SolarCity]

I'd go for the IG TL 30 over the IG30 - it will produce a better yield.

 

[Yanman]

Hi BiggsSolar It didn't appear like that on the Fronius configurator unless I read it wrong. It also says: Please note: Module grounding at the Fronius IG TL not possible!

 

[JohnBoyZ]

Just to update this thread, the new fronius inverter is working perfectly.

Its all well and good changing the inverter to solve the problem but do you have any idea what was the actual problem with the SMA? Was it an earthing issue? and what effect does the 30ma RCD have on the situation? (I believe SMA recommend 100ma)