Solar PV >>> technical question

legoman62

Sterlingtimes wrote: »

Sorry all, here is another query.


I have been offered a 16 x 250 watt system, i.e. 4,000 watts.


Alongside this I have been offered a Solaredge 2200 inverter.




The data for the inverter indicates a maximum DC input of 2400 watts and an AC output of 2200 watts.


Is there a problem here?

They may mean the SE2200 - SE6000 range

Could have have quoted wrong inverter. Give them a call.

Look here;)

http://www.solaredge.com/files/pdfs/products/inverters/se-single-phase-inverter-datasheet.pdf

tunnel

High Sterling,


Tell them to quote you on this one
Solar Edge 3680W 1ph Inverter 16A

and if they need a link to see for themselves http://www.swithenbanks.co.uk/Solar_Photovoltaic_Equipment/12858/Solar_Edge_3680W_1ph_Inverter_16A.html


That should see it right for you

Martyn1981

Sterlingtimes wrote: »

Sorry all, here is another query.

I have been offered a 16 x 250 watt system, i.e. 4,000 watts.

Alongside this I have been offered a Solaredge 2200 inverter.

The data for the inverter indicates a maximum DC input of 2400 watts and an AC output of 2200 watts.

Is there a problem here?

Almost certainly.

Hiya Sterling. Firstly, playing devil's advocate, your 2 panel arrangements won't peak at the same time, as they face in different directions. So expect peaks to be lower than a 4kWp system with a single orientation .......

however ..... the SE2200 sounds seriously undersized for your set up (I have a SE2200 on my 2kWp WNW system).

Now, for some boring numbers/guesses! My 5.58kWp system peaks (sustained peak, not short peaks) at about 4.2kW in really good conditions, when the sun is high and to the south, and is shining on all panels, though not perfectly.

4.2kW is a 75% ratio to the whole system, but my panels are 180d apart, whilst yours would only be 90d, so I'd expect your peak to be a little higher in percentage terms, when the sun is southish and hitting all panels with a reasonably good attack angle. So sustained peaks of more than 3kW. So as suggested above, you probably want/need 3.5kW or 4kW (3.68kW capped) for best compromise.

Probably a mistake in the quote, but if not, the price difference should only be around £150 - I think?

Mart.

theboylard

tunnel wrote: »

High Sterling,


Tell them to quote you on this one
Solar Edge 3680W 1ph Inverter 16A

and if they need a link to see for themselves http://www.swithenbanks.co.uk/Solar_Photovoltaic_Equipment/12858/Solar_Edge_3680W_1ph_Inverter_16A.html


That should see it right for you

Have you seen the package prices lately on Swithenbanks?!

Don't forget the prices are retail, but if you looked at http://www.swithenbanks.co.uk/Solar_Photovoltaic_Equipment/1133046/16_X_250W_Pantile_All_Black_Mono_System.html , for an ok system then budgeted around £1200 for install (inc scaffolding), that's a stonking price!!

Obviously no fine tuning but if you find an installer who will work with you....

tunnel

theboylard wrote: »

Have you seen the package prices lately on Swithenbanks?!

Don't forget the prices are retail, but if you looked at http://www.swithenbanks.co.uk/Solar_Photovoltaic_Equipment/1133046/16_X_250W_Pantile_All_Black_Mono_System.html , for an ok system then budgeted around £1200 for install (inc scaffolding), that's a stonking price!!

Obviously no fine tuning but if you find an installer who will work with you....

Wow, see what you mean(can honestly say I hadn't looked at that part of their website).
Now I can understand how prices are getting so low, if you could get an installer to work on £1k for labour/profit then sub £5k is easily achievable now, beggars belief that we still see people being quoted £8k+ for a 4kWp system(robbing bar stewards)

Sterlingtimes

Thank you all contributors. Via the board, I got a PM giving me the lead for a good local company. The postings have also got me sufficiently up to speed to make a decision. I am now ready to go!

tunnel

Good for you mate, care to expand on the setup and cost(if you have it yet)? It helps for anyone else who may be looking for pv if they know what ball park price and kit to expect for that price

Sterlingtimes

tunnel wrote: »

Hi Sterling(moss?)

The PO's should come in around £600 but not knowing what type of inverter you were quoted for originally its hard to say if its a good or bad deal

I'd like to think you could bring it in under £6k inc the solaredge, especially with some of the prices that's been banded about of late. Not really sure about the 6-10% improvement either unless you have some bad shading.

Obviously you may not need that type of inverter, best to check and double check, no point spending more than you need to

Sorry Tunnel


I will not reference supplier (out of fairness). It is a small local company. Solution is as follows:


14 off 270 watt Trina panels on one roof facing 20 degrees west of south. 14 off Enphase micro inverters. iBoost supplied and installed. Price £6,450 for everything.


I hope this helps.

tunnel

Hi Sterling,
The trees to the easterly direction, will they shade to SSW roof at all? I ask as I don't understand why you've switched to one roof rather than the duel aspect of 2 rooves.

Sterlingtimes

tunnel wrote: »

Hi Sterling,
The trees to the easterly direction, will they shade to SSW roof at all? I ask as I don't understand why you've switched to one roof rather than the duel aspect of 2 rooves.

The trees to the easterly aspect are not as bad as they look, but the surveyor, having regard for all of the circumstances, formed the opinion that I would be 30% down on power on the east roof and proposed instead to populate fully the south facing roof with one row of eight and one row six 270 watt panels.