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  1. S

    Can some body confirm my 3 phase PV design?

    Hi so i want to install the following over a three phase supply. South roof - 35 degree pitch. 14x Renesola Virtus 2 250W. One string (???) East Roof - 35 degree pitch. 8x Renesola Virtus 2 250W One string Total of 5.5kW. Inverter is to be SMA Sunny Tripower 5000TL-20 G59 installation with...
  2. U

    Solar

    Hi what sort of dc voltage could I expect on 16 panels x250watt'.
  3. S

    GFI fault showing on Power One Inverter

    I have a nominal 4Kw system comprised of 16 REY solar panels arranged on my roof with 11 facing south east and 5 facing south west. it is now 11.15 am and the Gfi (Ground fault indicator) LED is still illuminated. The total generation (FIT) meter is showing a red light which means that no power...
  4. C

    New system, string or micro inverters

    Hi all, I looking at having a new solar panel system installed in kent and would like some advice if you could spare some time. I have been looking at getting installed around 6-8 kw system. If I go for an 8kw system I would have shading issues on a bottom row of panels (spaced over two roofs...
  5. G

    Hyundai PV Panel Array - RISO test help

    I have two 8 panel strings laid flat on a flat roof connected to a Power One inverter. One of the strings is showing a RISO of 0.5 mohm or less. The cables and connectors are all dry and intact, so I think is is a faulty panel. The voltage test doesn't identify the actual panel. If I take off...
  6. P

    Low RISO fault

    Have a problem with a customers array as both the Power One 27.6tl and the 20.0tl are registering low Riso faults. The array has been earthed on the roof and is made up of Renesola 255s. When tested across the +ve and -ve of each string to earth the same voltages were obtained for all strings on...
  7. M

    Solaredge - Waste of Money

    Next week we are removing a solar edge system that has been on test for just over a year alongside an SMA inverter with an identical system. The Solar edge solution promises "25% more energy" yet delivers less and costs more. Thankfully we have none of this product out with our customer...
  8. M

    sma inverter testing string voltage & current

    have sma 3600tl inverter, done tests on each individual panel as installed also each string when connected together got results. then see my meter solar 150pv tester you can also plug into string when connected to inverter, just wanted to know if i can connect at inverter point for each...
  9. M

    Strange fault on DC string ?

    Working in Wales yesterday, 9 255w panels and 1 SMA 2000HF Inverter. So we have 1 string of 9 panels in series. The roof was like this with each letter corresponding to a panel. [A]-[B]-[C] [DORMA WINDOW] [D]-[E]-[F]-[G]-[H]-[I] ABC panels in landscape, the rest portrait. All panels at same...
  10. S

    mastervolt xs4300

    Had a call today from a customer of ours saying his pv system was underpreforming. Ok so i went round . System is 2xstrings 8 panels per string xs4300 inverter. 1st thing i did was check the dc voltage on the inverter it was displaying 105v dc 6.8amp and 800watts So i thought somthings not...
  11. S

    Eversolar 4000TL inverter issue

    Hi, Problem arisen with a solar pv system installed in December 2011. Eversolar 4000TL connected to 16 250W Suntech panels (1x string) Worked fine until 3 weeks ago where a problem has developed in bright sunshine, inverter makes a loud clonk and cuts out. Reads error code: UAC failure...
  12. D

    String voltage low, do I have a panel or two down?p

    I noticed today that my 16 panel system which was installed 14 months ago was showing a lower inverter input voltage than what I remembered. The system is 2 x 8 Hyundai 245 panels in parallel with a Power one 3600 outdoor inverter. Today was totally cloudless and the inverter was showing 215 -...
  13. P

    A PV question from a UK installer in Australia

    Hi All, I'm Dan. Totally new here. I worked as an electrician in Manchester doing solar and basic HVAC before moving for a stint in Australian PV. Here a few years now. Happy to swap stories / prices / knowledge etc. Background to why I have signed up for this forum: I have been wanting to...
  14. J

    Fixing installation where 1 string should be 2

    Hi, On a recent installation a new subbie wired up 1 string of 16 (CS6P-250P) where there should have been 2 strings of 8. Scaffolding came down yesterday but now system has an over-voltage shutdown, not surprising really. Question is ... can it be fixed by asking them to split the incoming...
  15. Davehaywire

    testing dc cables

    well that was fun! very limited testing of dc turned up at job this morning a field of solar panels to test 5 mins instructions off we went carried out irpos to earth array neg to earth array polarity isc with test isolat voc managed to test 1 string pair on 50 invertors not bad for first day!
  16. M

    European installation standards for US based installer

    I'm looking for some input on minimum installation standards for an installation that is a hybrid of US and EU equipment for an installation I am working on. The project is located in a Caribbean island that uses 230/400V 60Hz. My solar training is all US focused although I am originally a UK...
  17. J

    sma overvoltage

    Hello, i am new to forum just need a bit of advice, installation of a 3600tl sma inverter going in to lockout overvoltage first thing in mornings been ok up until nw 3 months old, panels are 250 x16 on single string is this the problem should it be 2 string has shown up to 630v dc max at moment...
  18. S

    String in SWA cables

    Here's a question: What is the purpose of the length of string found in the middle of larger CSA SWA cables? Strain relief when pulling the cable, or something else?
  19. G

    DC string testing at the end of the day

    We were installing a system on an east facing roof today, so by the time I got to doing the DC string tests the sun was well and truely off the roof and close to setting to the west. The string voltage was so low at 408V as opposed to the nominal 444Voc that it could well have been an entire...
  20. P

    solar edge vs string inverters performance

    HI We have installed about 12 solar edge systems and not one of these systems have outperformed our sma string inverter setups. Although there are variables which will influence the results we have 2 installs relatively close to each other, same tilt and orientation 16x yingli 250 pandas. The...

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