array

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  1. Mark42

    Sizing DC cables, PV Array to Inverter. Confused. Help please!

    My brain is overheating trying to make sense of PV panel parameters and calculate the CSA of a DC feed cable to the inverter. For my 16 HL Solar 250W panels, the spec is: Imp 4.94A Vmp 50.6V Isc 5.35A Voc 60.5V Two strings of eight panels in parallel. Therefore: Total current at max power =...
  2. O

    Ballast Calcs - flat roof array frames

    Sorry if this is out of place here... But any advice from real world experience would help. Rather than designing PV system using off the shelf mounting systems like Consoles for example where the ballast requirements can easly be ascertained from the installation manual, I'd like to explore...
  3. D

    Ground mounted solar

    Would you know the advised distance between solar frames on a ground mount system Ie one system directly behind another? The back of the first system is 1900mm affl and the next system behind this should be 9000mm away to clear sunlight at 12 degrees in decemeber (its in scotchland!) But that...
  4. D

    split a single string pv array in to 2 using a splitter

    I am a solar installer and i have been told that i can use a mc4 splitter to connect 1 string in to both connections on inverter as they had done this before to spread the load surly this can not be right. as a splitter is used for 2 strings going in to 1 not the other way around
  5. S

    DC Array cabling

    We are designing an install whereby the DC string cables need to come back from the middle of a garden to the property. We plan to install 6mm 4 core SWA cable to carry the load (2 strings) and wonder whether the armouring of this SWA cable needs to be earthed as in an ac application - the Regs...
  6. G

    Array size,Inverter size, what do i put on fit application

    HI all, Im installing 16 x 240w panels and a eversoler 4000tl, so i have 3.8kw system, whats the maximum allowed i read somewhere 3.68 so what do i put on the FIT application and when notifying the DNO.?? thanks Grand
  7. B

    3kw split array with an aurora 3000 - is it working correctly ?

    I have just had installed a Aurora power one split invertor and have 6 250W Solarworld panels facing east, plus 6 facing west. How do I know if both sides are working correctly ? I have no manual on the Aurora but from the panel readout I assume that PIN 1 is for one set of panels and PIN 2 is...
  8. M

    Dti Guide..... When will it be released??

    Hi, does anyone know if there is a proposed release date for the 3rd edition??
  9. M

    connecting array wired by others

    we're gonna be doing the ac work, and possibly connecting strings at inverters, on systems where other contractors will be installing the modules, and feeding cables through to us. or they may already have fed the cables through to inverter location! how can i be certain i'm observing correct...
  10. C

    Why a SB 3000TL-20 for a 4kW array?

    My installation has just been completed. I have 16 x Hyundai HIS-250MG panels connected in 2 x 8 strings to a Sunny Boy SB 3000TL-20. This inverter and configuration is as recommended by Sunny Design. However... The evaluation of design sheet gives PV peak power of 4.00 kWp, max. DC power of...
  11. R

    2 properties, 1 array

    Hi all, I've been asked to quote for a system where the array will span the whole roof space of 2 semi detached properties. The same guy owns both properties and rents out next door so he owns both roofs. All the electricity generated will be fed in to the house he lives in. The guy says he has...
  12. C

    Different watt panels same array?

    Firstly under normal circumstances i wouldnt even entertain this idea and have already advised against it. However... Is there a problem with installing 4x 250w modules and 10x 240w panels on the same array, same inverter? Will the 250w just lose performance or will the whole system be...
  13. G

    circuit advice

    can I check this ground mount system circuit with some one please. Henley block out of tails feeding existing board from cut out to include a small garage consumer unit with a 16A RCBO. AC isolator, generation meter, 6mm2 two core SWA (60meters) to AC isolator - Inverter. Earth inverter as...
  14. P

    Array frame earthing

    Having read the draft PV guide edtion 3 out for review, I see very little instances where you would earth or bond an array frame. I appreciate there are instances where you should but these seem quite rare reading the new guidline, even with transformerless inverters. is anyone still earthing...
  15. D

    3kw split array with an aurora 3000 for 9400 is that reasonable?

    Im getting a system installed with what should be a split 3kw ( 12 suntech 250's) with what should be an aurora 3000 inverter. one half is south east the other is west. It includes scaffolding ect. Does this sound ok? and is there anything i need to be careful about for the install. Im not that...
  16. B

    TL inverter & array frame bonding..confusing at best!

    Hello! I am putting in a 4Kw ground mount scheme with a TL inverter and I can't make sense of the DTI earthing tree. Framework to be of unistrut construction, and effectivley insulated from tera firma by concrete. The main incomer is PME, and if I follow the DTI tree, the end result is that I...
  17. A

    RCD tripping

    Hi All, First time for this so unsure what could be the cause. CSUN 250 panels - string of 16 connected via 4mm DC cable to Fronius IG TL 4.0 feed to CU via 2.5mm T+E DC cable run including the array is 22m and the AC run is 12m. Random tripping of the RCD, AC circuit is okay continuity and...
  18. P

    pv array test - isc test

    Hi all, What is the best method to safely test the short circuit current of a pv array. How do i physically have to do to carry out the test. I am sure our MCS assessor connected the positve and negative string cables of string together, before connecting into the inverter and used a clamp...
  19. N

    Mcs inspection help with array test please

    Have inspection soon and have done my install on my own house.Can someone please help with array test sheet. module is upsolar 240x7 one string array parameters stc. is this as a single panel or v x all 7 isc 8.4 protective divice type,dc rating and capacity ? a very cloudy day on the...
  20. D

    ~3kw Solar PV array required urgently in CHESHIRE !

    Anyone out there ( MCS & REAL accrediated ) interested in supply/fitting a 12 Sanyo N-series 240 or 235 hits / SMA SunnyBoy 3500TL with Sunny Beam so as I can make the Dec's FiTs cutoff date ??? To be installed on a south facing garage roof in East Cheshire within 2weeks ?? Dims:- 3500 x 6200...

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