output

  1. 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...
  2. 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 ?
  3. 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...
  4. 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...
    • Siddie
    • Thread
    • output pump return secondary solar system thermal
    • Replies: 6
    • Forum: Central Heating Systems
  5. 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...
    • Retroviper
    • Thread
    • connect led output though transformer
    • Replies: 2
    • Forum: UK Electrical Forum
  6. 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.
  7. 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...
    • danieru
    • Thread
    • flicker frequency low voltage output transformers varilight voltage volts
    • Replies: 4
    • Forum: UK Electrical Forum
  8. 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...
  9. 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
    • sweetcheeks82
    • Thread
    • output pat pat testing testing voltage volts
    • Replies: 12
    • Forum: UK Electrical Forum
  10. 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...
  11. 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...
  12. 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...
  13. 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?!
  14. B

    Voltage Spikes....

    Voltage spikes cause drops in solar PV performance | YouGen Blog | YouGen, Renewable Energy Made Easy Interesting blog on this "phenomenon"....we came across it once after an install we did that included SolarEdge....the chap owned an electrical maintenance firm and had spotted it via the SE...
  15. P

    pv output

    HI What do people use to send data (automatically) to pvoutput please?
  16. B

    Dimmer Query

    Hey All, I installed two sets of 6 lights, each set controlled by a dimmer. When i bypassed the dimmers, i got 240v at the end of line lights. when the dimmers are connected, i got 208v at the end of line lights. The dimmer switches were on full, i dont know where im losing the 32v...
    • BMelectrics
    • Thread
    • designed dimmer isn't lights output query
    • Replies: 7
    • Forum: UK Electrical Forum
  17. Richard Burns

    Twin output bathroom downflow heater

    Does anyone know of a bathroom downflow fan heater than can be switched between two different heat settings whilst in use. The customer has asked for one but I feel that exposed switches are unlikely in a bathroom, however I have seen a review that said there was one available by pull cord...
  18. R

    DC output from a bridge rectifier.

    Been thinking about this. From standard UK 50Hz 230 Uo into a bridge rectifier the output would be 'b' on the drawing below? Thanks.
  19. M

    Ultima solar PV hybrid 3.84kW predicted 5333kWhpa output

    Hi, Has anyone come across the Ultima solar hybrid panels? I have just come across a quote stating that a 3.84kW system will likely have an annual output of 5,333kWh per annum. This seems a bit optimistic, but I am not familiar with the technology and wondered if anyone here is? cheers Matt
  20. V

    LED Lighting control

    Looking to install quite a lot of floodlights for a customer (direct replacement of SONPAKS), been looking at the LED floods which give a good output along with energy saving for the customer However i have been told by the manufacturer that you cannot use a photocell/retro fit photocell to...
    • vernam616
    • Thread
    • contactor control led lighting looking output photocell
    • Replies: 4
    • Forum: UK Electrical Forum
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