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figures

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  1. G

    March-April solar PV capacity figures and the July FIT cuts

    I've just spent the evening analising the Solar PV capacity figures for March and April to see what they would mean if DECC stick to their proposals for basing the level of FIT cuts scheduled for the end June / Start of July on these installation figures. Bluntly, it's not looking good, with...
  2. E

    Cut-out fuse shared by 2 properties

    Hi All, Been to look at a job, where customer wants to install 9.5kw shower. 3 Bed 2 storey flat. Calculating the load on board at present with diversity comes out at 68.8A, if the shower was added calculations came to 94.6A. Looking in the meter cupboard, the supply splits to 2 meters after...
  3. G

    real power figures

    Hi I was just watching the installation of 8 PV panels on my neighbor roof, in each panel was written 250W so in total this will make 2 Kw. As the panels will generate only low voltage C.C. power, this in turn has to be stepped up and convert to 230V C.A. for this purpose an inverter has to...
  4. S

    Silly question, but please spell out what the new FIT figures mean?

    Hi Guys, I missed the boat about MCS I've been busy this year until very recently I understand that the FIT's have changed, but what does that mean to a new install? I will be moving soon and as a consumer will it be worth doing having Photocells installed? As a contractor would it still be...
  5. A

    PV SOL users – help! as my knowledge is limited!

    Put Sunny Design in the hands of a novice and this comes out: Based on 4kW systems + SMA 4000TL-20 LG LG250S1C 857 kWh/kWp Suntech STP250S 20/WD 853 kWh/kWp Samsung LPC250SM 851 kWh/kWp Hyundai HiS S250MG 848 kWh/kWp Sanyo...
  6. T

    So many different investment return figures, which you use?

    I know in the end it doesnt matter as the disclaimer says you might make zero but seems to be so many calculators and different companys giving different quote figures for the FIT investment figure so wondering which do YOU use personally? Or how do you work it out? for example a £1000 per year...
  7. 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?
  8. C

    Most optimistic Annual Yield figures - PVGIS or PVSOL?

    I guess the question is in the title! Would anyone care to comment on how these compare. I currently use PVGIS and Sunny Design to estimate annual yield and for the most part for a given slope, azimuth etc their estimated yields seem to be pretty similar. i have seen some quotes from...
  9. P

    Stats on death/injury through electrocution or fault.

    Hi just wondered if anyone had any up to date UK stats on death or injury caused by electrocution or fires caused by electrical faults resulting in death or injury. I have seen stats on domestic house fires but these were not specific as to the cause. Any pointers much appreciated:)
  10. E

    Frightening figures

    There must be at least 5 enquiries about the domestic Installers course on here weekly. Do the maths thats 5 x 52...so you are looking at about 260 DI's per annum. Off here alone. Frightening figures!
  11. S

    Confused

    Ok, I bit the bullet and bough PvSol, now I'm trying to design 2 systems on it - PC about to go out the window :mad: Can't figure out how to add the panels onto the roof (already identified panels and inverter and roof size and boundaries) Did a test report and the yield is way below...
  12. S

    can someone please confirm my working out, just for piece of mind.

    please can someone confirm my working out of a annual return, as this is my first quote and just need confirmation that i have done it right. the system is a 22 panel 180W bp mono system and i am assuming the customer will be exporting 50% 22 panels x 180W =3960W or 3.96kW this will...
  13. SolarCity

    SAP calculation figures vs. PV SOL figures

    I am becoming increasingly frustrated at the survey handcuffs we all have to wear regarding performance figures. While I can see the benefit of maintaining an industry standard for evaluating system performance, I find it a little baffling that we use such a vague and general standard such as...
  14. G

    Zs figures for a TT System

    Did a Periodic today on a TT system. The Ze was a reasonably healthy 38 Ohms and the Ze figures for the various circuits were around the 25 ohms figure. All circuits are protected by a 30mA RCD and the boards main switch is a 100mA time delayed RCD. The Zs figures are way higher than the...
  15. S

    length of circuit calculation - head scratching stuff!

    Hi all, How do I work out the length of a circuit? I have these figures R1+R2 = 0.40 The circuit is wired in 2.5mm/1.5mm T&E I take it I need to know the resistance of the T&E (where do I find this?) Could someone give me the formula or point me in the right direction Thank you.

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