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...
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
This is starting to get right on my !! Now.
Needed a few pumps in the last few months, which wasn't the easiest of jobs getting like for like. But now I can't get them or any for that. All the pump and motor manufacturers are only supplying single phase motors wdf. Some ass in the EU/ G12 or...
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...
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...
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...
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...
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...
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:
now this is not exact, but comes close. say you have a 3 phase, 400v motor, given the kW, to get an approx. value for the current per phase, (can be done in your head), just multiply the kW x 1.5. e.g. a 20kW motor. I = 30A. ( not allowing for efficiency, pf etc. ) just to give a rough idea.
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.
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...
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...
Could anybody please explain the relevance of panel efficiency in real terms?
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...
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.
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...
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%...
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...