Solar PV Ordered!

ColinFishwick

That article is dated July 2010 hardly today's paper, did you post the wrong article?

energysavingexp wrote: »

the firm that is going to fit my solar pv system as contacted me to tell me that they cannot get hold of sharp pv panels due to shortage.
also i found this in todays paper about shortage of inverters.


http://www.telegraph.co.uk/earth/earthnews/7867727/Shortage-in-parts-for-solar-panels.html :mad::mad::mad::mad:

zeupater

mesopeply wrote: »

HelloI am a beginer astrophisicist and I need full solar spectra at diferent times. I need solar spectra at least for the last 12 yaers.If anybody can help me I will be thankfull.Jorge

Hi

You'll find that any data which would be collected by inverters regarding insolation would be surface measurements which will include the effects of cloud cover. Also, I'd guess that there aren't many installations around with inverters which would have had the ability to collect data for the 12 years you require.

Have you tried the normal sources for this data ... ESA/NASA/Met-office/NOAA etc .... ?

For starters .... NOAA ... http://www.ngdc.noaa.gov/stp/solar/solarirrad.html#composite

..... or for data sets (I use these) .....
ftp://ftp.ngdc.noaa.gov/STP/SOLAR_DATA/


HTH
Z

Automan_2

Question.
If your neighbour also installs a similar system will not both systems fight to push power back into the grid both pushing up the mains voltage to the limit of 253 volts?

Also in my area the voltage is often already at 253volts (using an accurate fluke DVM) 245v at the moment 20:41.

That being the case, I would imagine the inverter would not be able / permitted to increase the voltage and thus no savings?

Automan.

zeupater

Automan wrote: »

Question.
If your neighbour also installs a similar system will not both systems fight to push power back into the grid both pushing up the mains voltage to the limit of 253 volts?

Also in my area the voltage is often already at 253volts (using an accurate fluke DVM) 245v at the moment 20:41.

That being the case, I would imagine the inverter would not be able / permitted to increase the voltage and thus no savings?

Automan.

Hi

In theory the above situation could cause a grid out-of-specification error on your inverter which would trigger the unit to disconnect & wait for the condition to clear.

The local DNO have a duty to ensure that the supply is within specification and may need to tweak things in your locality a little to compensate. Your installer should give you advice on this if it happens, or even liaise directly with the DNO on your behalf if they're decent.

HTH
Z

stoozey

you can have upto 32A per phase as long as it is a ring as opposed to a single run. Have a few myself. The 16A is merely a load function for a single cable, as long as you use the correct rated cable from inverter to consumer unit you can have upto 32A. So all this talk about 16A is not true according to our sparky anyway.

zeupater

stoozey wrote: »

you can have upto 32A per phase as long as it is a ring as opposed to a single run. Have a few myself. The 16A is merely a load function for a single cable, as long as you use the correct rated cable from inverter to consumer unit you can have upto 32A. So all this talk about 16A is not true according to our sparky anyway.

Hi stoozey

The references to 16A per phase do not relate to your house wiring, they refer to the AC output of your inverter in a distributed generation environment. Your pv installer is normally allowed to install G83/1 inverters with a limited maximum current of 16A without requesting prior consent from the local DNO, above this rating the connection will be classified as G59/1 and the DNO must be involved in the planning and provide consent prior to connection due to the possibility of there being a need to upgrade the local network to accept the connection ... this talk is definately true, ask your sparkey, if he(/she) still disagrees refer to G83/1, Ofgem, your DNO etc.

Reference : IET Distributed Generation factfile - http://www.theiet.org/factfiles/energy/dist-gen-page.cfm

HTH
Z

energysavingexp

new solar pv system fitted and up and running.
22.5 KW todays total.
system turned on at first light at 6am and gone in to standby at 8.30pm.:j:j paid 12.5k for a 3.92kw system.

zeupater

energysavingexp wrote: »

new solar pv system fitted and up and running.
22.5 KW todays total.
system turned on at first light at 6am and gone in to standby at 8.30pm.:j:j paid 12.5k for a 3.92kw system.

Hi

I take it that your installer found some Sharp panels for you then ??

Z

energysavingexp

zeupater wrote: »

Hi

I take it that your installer found some Sharp panels for you then ??

Z

Hi Zeupater

yes he managed to get 16 sharp 245w panels.
he has done a great job fitting them all. the rafters were in the wrong place for the brackets. so it took him all day fitting noggins.
this was because i wanted the panels fitting in lanscape to avoid shadowing in winter time.
and i did not want the inverter in the loft.
he did all the extra work for nothing.
and i did not have to pay him untill the job was done.
is todays output ok for a 3.92 system?

zeupater

energysavingexp wrote: »

Hi Zeupater

yes he managed to get 16 sharp 245w panels.
he has done a great job fitting them all. the rafters were in the wrong place for the brackets. so it took him all day fitting noggins.
this was because i wanted the panels fitting in lanscape to avoid shadowing in winter time.
and i did not want the inverter in the loft.
he did all the extra work for nothing.
and i did not have to pay him untill the job was done.
is todays output ok for a 3.92 system?

Hi

I agree with not putting the inverter in the loft ... mine's in the garage, with the extra DC resistance losses being compensated for by using heavier gauge cables.

Payment on completion looks good. I negotiated 25% on order with balance on completion. There was no way I'd pay the maximum split allowed which some installers require.

Regarding the 22.5kWh from your system yesterday being good, this depends on where you are, your weather conditions yesterday and the orientation of your roof. For example, my roof is approx SW and we were overcast until about 2:30 yesterday but still managed to produce over 18.5kWh. However, despite the recent sunny/warm conditions, system performance has been heavily restricted by haze, so I've only hit 22.5kWh a couple of times this month ..... Looks like it's out with the 'wrong type of leaves' or 'wrong type of snow' & in with 'wrong type of sky'

HTH
Z