problems with new pv system

[dss456]

Dear all
3 months ago I had professionally (fully acredited) instalation of 10 sanyo ht n240se10 PV panels on my roof. they feed into a Sunnyboy 2000hf inverter. From the very begining the output from the inverter has been very poor. When the electrician contacted SMA they took all the output figures + agreed with him that the power from the panels was fine. They said that it must be a faulty inverter. After waiting to get a replacement a new sunnyboy (same model) was fitted 3 weeks ago. Still the power generated has never gone above 750w (+that v briefly) and the total generated in almost 4 weeks is 29kwh (about 1/3 what I believe I should be getting) at this time of year given my annual estimate of 2160 kwh. The electrician says he is foxed + the desiegner says he has rechecked all the spec + there should be no problem-whilst obviously it is their problem to short out has anyone come across this before?
david
other figures on my cert are voc 327.2v + isc 1.4A

 

[JohnBoyZ]

Dear all
3 months ago I had professionally (fully acredited) instalation of 10 sanyo ht n240se10 PV panels on my roof. they feed into a Sunnyboy 2000hf inverter. From the very begining the output from the inverter has been very poor. When the electrician contacted SMA they took all the output figures + agreed with him that the power from the panels was fine. They said that it must be a faulty inverter. After waiting to get a replacement a new sunnyboy (same model) was fitted 3 weeks ago. Still the power generated has never gone above 750w (+that v briefly) and the total generated in almost 4 weeks is 29kwh (about 1/3 what I believe I should be getting) at this time of year given my annual estimate of 2160 kwh. The electrician says he is foxed + the desiegner says he has rechecked all the spec + there should be no problem-whilst obviously it is their problem to short out has anyone come across this before?
david
other figures on my cert are voc 327.2v + isc 1.4A

I'm not saying this is the problem but Sanyo+HF Compatibility issues have been covered a while ago in a previous thread
http://www.electriciansforums.net/p...compatability-issues-sma-hf-sanyo-panels.html

 

[whinmoor]

Consider a different brand of inverter. Fronius or Power One may be the way forward.

 

[BruceB]

Or update the firmware in the inverter to have optitrac global peak running.

 

[liquidity]

Just to get the complete picture - what is the orientation of the panels, any shading and how many strings?

 

[Nutmeg2]

I have a similar installation and have definitely had generation of well over 1000 W over the middle of the day on sunny days. My panels face almost due West. I live on west side of London.

 

[dss456]

Just to get the complete picture - what is the orientation of the panels, any shading and how many strings?

orientation south 1 string no significant shading