efficiency

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  1. T

    Highest Wattage Panel You've Seen

    Whats the highest wattage panel you've seen? and by who if you can remember? seen some Chinese ones at 400w and wondered if any of more well known ones have bigger output than 250w or some in the pipeline for release at future date. Might help for future planning.
  2. Mark42

    Panel efficiency: Why does it matter?

    I’ve been comparing various makes and models of PV panels for an 8kW project. Sales people keep on and on at me about this or that panel being ‘more efficient’ than some other, so is obviously worth the extra cost. My understanding is that the efficiency of a panel is the rate at which it...
  3. T

    Latest From Greg Barker Comments on Energy Efficiency Requirements

    Fairly lengthy article from Greg Barker here: Solar energy industry may be on threshold of an exciting era | Greg Barker | Environment | guardian.co.uk Little concerned about his comments on the Energy efficiency Requirements: " We really shouldn't be offering a costly subsidy to people to...
  4. P

    Solarmax Efficiency figures...confused

    ...basically, I note the datasheet has Max Efficiency Figures and European Efficiency figures. Can anyone explain the difference? Thanks Newb
  5. K

    Trade mags

    Afternoon all, I just pased the 2399-11 and I'm left with more questions than answers :( Anyone know of any trade magazines for products/jobs etc. Any trade shows coming up? Is the InstallerLive at the NEC a little too plumber based. Lastly, how the heck do I learn to do an energy efficiency...
  6. G

    Panel efficiency, an explanation please

    Could anybody please explain the relevance of panel efficiency in real terms? e.g. Sanyo H series 250W panel - 18% efficiency Sharp 250W - 15.2% efficiency Mitsubishi 250W - 15.1% efficiency 16 of either of the above panels would give me a 4kW system so where does efficiency come into play...
  7. L

    another perspective on comparing different brands of panels

    So having had a bit of time to play with a loaned laptop running PV Sol I decided to analyse some 4 kWp systems using differrent panels all using an SMA SB 4000TL inverter. Here's a summary table. qty panel watt kWp PV Sol size area theoretical PV Sol % efficiency efficiency 16...
  8. W

    Extractor cooker hood efficiency

    I am about to fit a cooker hood with extractor. The vent is some 12 feet from the hood; one bend only. Can someone tell me what capacity (cubic metres per hour) of fan would be required to "blow" that distance? Thanks in anticipation Will2
  9. S

    Black Suntech Panels

    Anyone know where I can source black Suntech panels?
  10. G

    How to use efficiency figures

    having a lot of trouble reading the tech sheet on panels. If a modules efficiency is 14.3% and another is 14.7% how many Watts extra is it likely to produce under STC? is there an equation for this?
  11. W

    What size are you quoting on DNO forms - Peak or Instantaneous output?

    Had a meeting with One of the northern DNO's today and they were as helpful as ever, we were actually talking about over 50kw but this question also applies to the 3.68 to 4kw range. On the ENA DNO application form it asks for the net plant size - what are you filling in for this figure? as I...
  12. S

    Average Annual Power Output per pound spent vs Panel Efficiency

    I am in the process of getting quotes for a PV system of up to 4kW for a house located 35 miles SW of London, and have been looking at various manufacturer's claims w.r.t. performance. The primary data that I seeing presented are: maximum panel output panel efficiency, albeit no satisfactory...
  13. S

    Panel Degradation

    Can anyone explain the impact of degradation on panel efficiency please? I'm struggling to understand why the Schott panels are better than others with amonia when they are less efficient. Ie Schott 230 13.7% ish and Sharp 245 (when certified) 14.9%. Surely if the sharp panels are 1.2%...
  14. F

    Efficiency of Roof Tiles

    Hello All Anyone had any experience with efficiency of roof tiles, is anyone currently monitoring a roof tile system, and is it performing well? does the initial cost ever outway the return... Regards David
  15. SolarCity

    Differences in panels

    Can anybody please help me out with regards to the differences between panels and their potential yield. PV Sol does a great job of giving you figures based on which panel you use but I can't work out why some 180w panels give out one return and another 180w panel gives another figure. I...
  16. S

    yield and efficiency calcs

    Hi all I need a book or something online to help me spec my first system which i want to use for my MCS registration job. The installation will probably be on my own house. i'm looking at the Schott poly 220 modules and i'm confused whether i should be using the electrical data at STC or...
  17. S

    Luminous Efficiency

    Hi all - Very new to this site, wondering if someone could help me! "All lamps must have a luminous efficiency greater than 40 lumens per circuit" Can anyone help/explain the above statement? Thanks Adam
    • sambuca2907
    • Thread
    • aus efficiency electricians' talk
    • Replies: 6
    • Forum: Australia

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