efficiency

efficiency

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  1. S

    HJT’s low-light performance and bifacial power generation efficiency

    Hello everyone, can someone please introduce to me the low-light performance and double-sided power generation efficiency data of Maysun Solar's HJT photovoltaic modules? Does it perform much better than ordinary components?
  2. A

    12v or 24v for efficiency

    Hi, I understand some basics about wattage, volts and amps etc but I am trying to decide what would be the most efficient system Situation - 2 x 110 amp hour 12 volt batteries wired in parallel. Use these to heat approximately 8 liters of water through a DC water heating element. Which of...
  3. D

    UK - LED Bulbs Efficiency

    Hello - I am a new member (and just a UK householder rather than a professional) and have a couple of questions about domestic LED bulbs. I want to update many bulbs in my house and looked at the web sites of B&Q and Wickes. Both sites show bizarre variations in energy efficiency ratings for...
  4. T

    4.57Kw PV with a 4Kw inverter. Inverter too small?

    Hi, I bought a 4.57Kw PV system (14x SunPower 327W panels) for my house last year. I now noticed that the installer fitted a SE4000 Solaredge which is limited to 4Kw. I can see from my stats that the system goes up to 3.98Kw but never above. It just goes flat and stays at 3.98Kw (especially...
  5. K

    Question help

    any help with this greatly appreciated..the output of a series dc motor when connected to a 230v supply and running at 1320 rev/min is 3.5kw. the supply current for this loading is 20.5A 1.calculate torque developed 2. Operating efficiency
  6. S

    Conversion Efficiency Of 18.2% Achieved Using Perovskite Solar Cells

    A research group in Japan achieved energy conversion efficiency exceeding 18% using standard size perovskite solar cells. A research group led by Liyuan Han, a leader of the Photovoltaic Materials Group, National Institute for Materials Science (NIMS), Japan, achieved energy conversion...
  7. Marvo

    Energy efficiency of MCB's

    Something that came to my attention recently was an MCB with an efficiency rating and a predicted KWh decade energy loss figure for the OCPD itself. Do the UK consumer units ever come with efficiency ratings? I guessed this was in response to some new EU or US regs regarding supply or...
  8. Dan

    Latest wave of ECA energy efficiency advisors

    Electrical contractors recognised for completing ECA - Schneider Electric course Read the full news article
  9. Dan

    First ECA Energy Efficiency Advisors recognised

    Three electrical contractors achieve new EEA status Read the full news article
  10. S

    DIY Balsamic vinegar fuel injector increases fuel efficiency

    It doesnt. However my van radio refuses to keep good reception, i changed the radio, then ran a new aerial cable and new aerial, then i put a longer aerial on. I think its electrical interference, its mostly when the van is moving, and sometimes the wipers make it worse. AM radio has a constant...
  11. O

    Module efficiency and kWh/yr

    Hi people Does any one include module efficiency when working out kWh/yr generation. We never have, and wasn't sure how to include it in the MCS calcs. I ask, as a competitor as quote a much higher generation total then we have for the same 35kWp, and the only difference I can see is they...
  12. SibertSolar

    250W Mono >16& efficiency?

    Hi all, I'm trying to identify a mono module that has higher than 16% efficiency, preferably 250Wp (60cell) but would look at higher wattage (perhaps 72cell) modules too. Any thoughts/advice?
  13. Dan

    ECA CEO welcomes infrastructure and energy efficiency investment in Chancellor’s Autu

    Steve Bratt, ECA Group CEO, has welcomed the launch of a £1 billion, six year Government programme to fund infrastructure to unlock new large housing sites, announced in the Chancellor’s Autumn Statement on December 5. Read the full news article
  14. S

    Relevant building or not?

    Hi, I have a 30kW project where panels are to be mounted on a warehouse style building that has no form of heating but has just had a 3 phase supply added to it for the purpose of running a large heat pump. The heat supplies two other buildings (main house and maids quarters) but they are on a...
  15. H

    High efficiency PV panel source (one-off qty)

    I'm doing an off-grid install on a narrowboat requiring a small no. of panels (e.g. 5 x 100W or 2 to 3 larger panels - aiming for 400Wp to 600Wp with a 450Ah battery bank). Solar payback for this setup is high because its solar or diesel generation only (rough estimate 5p / Ah at 12v). So I...
  16. A

    High Efficiency fluorecent fittings

    Hi guys Been asked by a friend to replace the fluorecents in his industrial unit he has seen some high efficiency fluorecent fittings installed in another building which have a very narrow tube! Im struggling to find such fittings can anyone point me in the right direction. Than you ashley!
  17. F

    Slightly off topic heating-related/green energy question

    Hi guys. This is quite a long post, and perhaps a bit off-topic, but I suspect that this section of the forum is about the best place to start asking...... As you'll know, I am enthusiastic about "green" and "eco-friendly" solutions. I recycle, I grow my own fruit and veg, I have solar PV and...
  18. S

    Profit over efficiency?

    I have been asked to provide an estimate for the installation of a 2Kw system on each of 13 houses. The energy assessment does not make it clear as to whether it has to be 2Kw installed or 2Kw net. Most of the houses will have front facing dormers which by my calculation mean a maximum of 5 x...
  19. Princesolar

    Installations since April

    Interesting to see the amount of Installations since April. What do you think will happen to the market in August with the proposed 20 year tariff at 16p? How long can the market continue to survive on these cuts,and do you think that panel prices will continue to fall or have they now hit there...
  20. Princesolar

    EPC Solar Thermal

    I was totally shocked to find out when registering a solar thermal and a heat pump installation we carried out that no EPC is required, how an earth does that work when they both involve heat loss, yet pv producing electricity requires it? Proof they are trying to kill the pv industry :61:

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