solar pv quote

Martyn1981

asturdy2 wrote: »

whats the price difference between a standard and dual inverter ?

Hiya. The answer is similar to the length of a piece of string. Different makes, models, suppliers, installers etc. But, prices of inverters are falling, and there are simply loads of dual MPPT inverters (just like the Aurora 3.6TL), so any cost difference can almost be ignored, and simply haggled. But in your case it's there already in one quote.

It might seem silly to make a fuss over that vent, but it will have some effect, and even if it's small, perhaps 2 to 5% that still adds up over 20 to 40 years. I've read many comments by people disappointed by their generation, only for it to increase substantially when the scaffolding came down, as the poles were causing problems.

If that vent can't be lowered, then simply shifting it further towards the ridgeline (rather than mid(ish) roof) will move it to the NE of the panels, and the damage will be minimal, as the roof won't be seeing much sun that early in the morning anyway. Worth researching all the regs and options. Soil pipes in similar positions often come up on these threads too.

However, just in case you hadn't realised, we're being pedantic to maximise the set up. You actually have a good looking situation there, that should work very well.

Mart.

silverwhistle

Martyn1981 wrote: »

I've read many comments by people disappointed by their generation, only for it to increase substantially when the scaffolding came down, as the poles were causing problems.

Has anyone any knowledge on the impact of pidgeon s**t? Wish I'd thought of having the aerial down whilst the scaffolding was up. It hasn't been a problem this wet winter, but...:D

asturdy2

just had 4 more quotes back,


Quote 1, 14 kioto KPV 260 w panels with poweron 3.6kw inverter 3.64kw total system producing 2446kw for £5731 ROI of 8.38%


Quote 2, 14 kioto KPV 260w panels with micro inverters 3.64kw system producing 2751kw for £6602 , ROI of 8.02%


Quote 3, 12 sunworld 327w panels with poweron 3.6kw inverter, 3.92kw system producing 2801kw for £7920, ROI of 6.09%


Quote 4, 12 lg300 panels with poweron 3.6kw inverter, 3.6kw system producing 2570kw for £6972, ROI of 6.56%


I know having sunworld 327w panels if your short of space or micro inverters if you have shading issues is mentioned a lot on here but if you look at the figures then the extra outlay doesn't seem worth it.


My first quote looks the best just need to get that chimney moved to sort the shading out !

tunnel

Think you've pretty much summed it up, get the chimney moved. I would look at installing panels up to 30cm from the edge of the roof though, potentially opening it up to a 4kWp system. It is your house and you can do as you wish. If you ask most PV owners on here I think you'll find that their installations are pretty much like that, mine is for sure and there's been no issues with wind.


Some good prices though, take a pat on the back

asturdy2

well the quotes for 14 panels will leave a 25cm gap, to get a 4kw ststem I would need to use the sunworld panels but these would cost £7900 !, seems I have a choice of 14 kioto panels for £5730 or 12 lg panels for £5995, Both 3.6kw systems.


Any feedback on kioto panels ? The installer said they use them on the majority of there installs unless someone asks for something specific.

tunnel

Do you have the exact roof dimensions, maybe someone could then suggest a different panel that may fit better to get you 4kWp


Just found these
Yingli Solar 275W Mono Silver Frame Solar Panel

LG 285 N1C Mono X NeoN G3 Black Frame Solar Panel

asturdy2

the roof is 7.6m wide and 4.4m high, the plan is to have 2 rows of 6 portrait with a 50cm gap or 2 rows of 7 with a 25 cm gap and extra fixings, you can't fit 15 landscape or a mixture of the 2, its either 12 or 14.

tunnel

asturdy2 wrote: »

the roof is 7.6m wide and 4.4m high, the plan is to have 2 rows of 6 portrait with a 50cm gap or 2 rows of 7 with a 25 cm gap and extra fixings, you can't fit 15 landscape or a mixture of the 2, its either 12 or 14.

Well 14 of the LG panels above would give you 3.99kWp and 14 x Yingli at 3.85kWp. The Yinglis are about £30+vat cheaper than the LG's, worth asking about!!


Take a look on here and see if there's anything that may help, like BenQ's which are sunpowers in sheeps clothing
http://www.swithenbanks.co.uk/shop.php?c1=Solar Photovoltaic Equipment&c2=Solar Panels

asturdy2

tunnel wrote: »

Well 14 of the LG panels above would give you 3.99kWp and 14 x Yingli at 3.85kWp. The Yinglis are about £30+vat cheaper than the LG's, worth asking about!!


Take a look on here and see if there's anything that may help, like BenQ's which are sunpowers in sheeps clothing
http://www.swithenbanks.co.uk/shop.php?c1=Solar Photovoltaic Equipment&c2=Solar Panels

only problem is the cheapest company for lg's will only put 12 on, the other company which will bend the reg's to get 14 on want nearly 7 grand for 12 !

Martyn1981

asturdy2 wrote: »

only problem is the cheapest company for lg's will only put 12 on, the other company which will bend the reg's to get 14 on want nearly 7 grand for 12 !

Hiya. Been playing and nosing, and using the supplier Tunnel linked too, here's another option:

Firstly I've made loads of assumptions, the main one being that I'm using the pre VAT retail prices, which may differ from what your installer(s) can get, but stick with me. Don't worry about VAT, retail/wholesale etc, this is just for comparisons.

On that site it has LG 300Wp for £255, which works out at 85p/Wp.

It also has Panasonic 240Wp (hybrids) for £209, which works out at 87p/Wp, so close enough(?)

Next the dimensions of the Panasonics are 1580mm by 798mm. So you could fit 2 rows of 8 panels in portrait, with a total of 3,180mm high (1580*2 +20), and a width of 6,524mm (798*8 +7*20) ....... approx.

Those measurements should be well within the useable height and width, even if you allowed a full 500mm clearance all round.

The installer may of course be getting some great deal on those LG 300's, and can't get it on Panasonic's, but if you don't ask!!!!

Mart.