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output

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  1. S

    PV Solar Output 4K System

    Hello Everyone, My first post here and I would like to say what a great forum! :) Found loads of useful information and this has helped me choose the right system and I now have a 4KW system up and running since last Friday 27th Sept. I'm looking for links so I can compare my system with...
  2. The Solar King

    MCS PV Output Estimation and Shading

    Some of you may remember that both myself and Gavin A wrote Mr Angry letters to Gemserve/MCS on this subject. (http://www.electriciansforums.co.uk/photovoltaic-solar-panels-green-energy-forum/75215-mcs-guide-installation-photovoltaic-systems-shading-3.html) Without boring you with the...
  3. E

    Panel Performance Loss over Lifetime, reflect in k/Wh/ROI figures.

    I'm just trying to get some clarity on the above. We currently develop EPiSOLAR, software for people involved in Solar PV sales. At the moment we don't include any figures for panel degradation over lifetime, I've been in contact with MCS who have referred me to RECC who have been unable so...
  4. rustynails

    general purpose timeswitch help!

    hi all, I'm having a nightmare with a Newlec NL24HRTS 24 hour General Purpose Timeswitch. The customer wanted to swap an old pin type timer for this new timer. So I went about fitting it and I cannot get it to operate correctly. The time switch would be used to turn on 3 outdoor lights for...
  5. C

    Sky digibox rf2 output - power to magic eye option to be turned off by sky firmware ?

    "Hello All", I wondered if anyone else has heard the RUMOUR that Sky are going to broadcast a Firmware Update around September which will have the `accidental effect` of removing the Set Up Option within the Engineers Set Up Menu to turn Power ON to the Digi-box RF2 Output / Remote Control...
  6. The Solar King

    Low output until panels in sun thread on public side - how much more to offer?

    I have pm'd the guy a few times as he is relatively local to me. I now know who the installer is and have had a look at the property on Google Earth. I suspect he has been well and truely shafted. The company involved are spun out of a laminate flooring stack em high sell it cheap chain...
  7. D

    low output until all panels in sun

    I have an electricity monitor on our 4kw pv system so I can see what the output is and I noticed today that about noon when all but the last 2 panels were in full sun it was outputting 0.3kw. As the sun moved and that last 2 panels came into full sun it went up to full output of over 3kw in...
  8. J

    Higher PV DC Output voltage

    Just been advised by a customer he had been told a higher DC output voltage (HJ Solar 250w) was better when shading was an issue. Is this correct ?
  9. Mark.W

    Relay Choices

    Morning Chaps A customer has asked me to install a Carbon Monoxide alarm in his boiler room so that when CO2 is detected it switches off his boilers and also then illuminates a light on the other end of the building. I was thinking on the lines of a relay..... but which one?? Could someone...
  10. S

    Solar Thermal secondary return pump Fluropro

    Hi I have been installing a Solar Thermal system (with a plumber friend) with a Glow-Worm Fluropro controller, and the system has a secondary return pump on it. I can't find any live output for the pump. I could just put the pump on a plug-in timer, but in the manual it states that the system...
  11. R

    LED Transformer

    Hello I have got a led light that has come with its own plug type transformer. The LED is 6V DC 30ma The Transformer output is 6V 400ma Would I be able to connect another identical LED light to this transformer even though it would involve cutting/connecting the output cable from the...
  12. H

    RS switch mode power supply

    Hi Guys, Has anyone come across this SMPS from RS, 445-107. Blurb says its class 1, because it has an earth pin. I cannot get a circuit from the earth pin to the '-' of the output. I have sent RS a question about this but have not had a reply. Must fail it as a class 1 appliance.
  13. D

    what frequency do 'HFAC' low voltage transformers (like varilight) typically output?

    Hi, I'm replacing low voltage halogen with MR11 and MR16 LED bulbs. AC supply would be simplest because of existing wiring, but I'm concerned about LED flicker: Characterizing and Minimizing LED Flicker - Lighting Solutions | DigiKey I'm looking at varilight transformers: VARILIGHT...
  14. O

    Solar panels - low output over the last 3 months

    Really just a very basic question. I hadn't been checking on my panels/generation meter for a while as life had just been very busy, but I was quite taken back when I did my generation meter reading?! In the last 3 months it put out less than half of what it did in the first two months (approx...
  15. B

    emergency lighting voltage output

    what voltage should be at the endcaps of an emergency fluorescent light fitting when switched over to emergency mode?
  16. S

    pat testing - ac output voltage

    Hi everyone. Please can someone explain how i calculate the output ac voltage of an appliance? If a power supply adapter shows output volts as dc how do i work out the equivalant output volts in ac? Thanks
  17. B

    Why 54.5VDC float voltage in a 48VDC system?

    Hi Everyone, I'm a bit puzzled by this, can anyone explain why a -48V dc power supply has a float voltage of -54.5V? Is it to account for volt drop? I know this forum is for pv but it's the only place I think I could get an answer! Cheers...
  18. C

    Frequency output of wind turbines

    Ok, if electricity in a wind turbine is generated by the wind spinning a coil in a magnet, how does it match the frequency of mains electricity (i.e.50 Hz) when the wind blows faster and slower all the time? Remember, there are no stupid questions, only stupid answers... :) (at least that's...
  19. Worcester

    Deemed Output - you may lose it if you have a Smart Meter fitted later on.

    Until a few days ago, I had assumed that if you'd signed up for FiTs with no export meter (<30kWp), then you got deemed output and go paid 50% of what you generated for export. Bearing in mind that MOST people actually export more than 50% (even the 2.5kWp systems) because it is difficult to...
  20. t4sltd

    Solar trackers

    Anyone installed them? Know any suppliers? Working for a client who wants to install trackers on a flat-roof 30m high! Anyone done a wind loading calcs for anything like this?!

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